JP2008000679A - Waste water treatment apparatus, waste water treatment system, and waste water treatment method - Google Patents

Abstract

Disclosed is a wastewater treatment apparatus that can easily remove dioxins mixed with a simple structure.
SOLUTION: A water permeable storage sheet 350 can be turned back to the outside of the processing tank 310, and a plurality of stacked sheets are provided in the flowing direction of the inflowing waste water. Activated carbon is filled between the containing sheets 350 to form a plurality of stacked activated carbon layers 360 in the drainage flow direction. The particulate matter to which most of the dioxins in the waste water adhere is filtered through the activated carbon layer 360 and the remaining dissolved dioxins are adsorbed. When clogging occurs, the accommodation sheet 350 is turned over to discharge the activated carbon and incinerate it.
[Selection] Figure 3

Description

  The present invention relates to a wastewater treatment apparatus, a wastewater treatment system, and a wastewater treatment method for removing dioxins mixed in wastewater using activated carbon.

2. Description of the Related Art Conventionally, various configurations for purifying wastewater containing contaminants such as dioxin by adsorption treatment are known (see, for example, Patent Document 1 to Patent Document 3).
In the device described in Patent Document 1, wastewater pressurized by a pressure manual pump is caused to flow into a pretreatment carbon filter, and a part of organic matter in the wastewater is adsorbed on the carbon filter. Thereafter, the pressurized wastewater is introduced into a reverse osmosis membrane separation device, and a configuration is adopted in which harmful substances such as heavy metals, dioxins, bacteria, and trihalomethane in the wastewater are separated to obtain purified water.
The structure described in Patent Document 2 adopts a configuration in which dioxins discharged from an incinerator are adsorbed on activated carbon, and the activated carbon that adsorbs the dioxins is oxidatively decomposed in supercritical water at or above the critical temperature / pressure of water. ing.
The thing of patent document 3 is the thing which settles in the coagulation sedimentation tank after the coagulant etc. are added to the wastewater storage equipment in the landfill in the landfill landfill and the drainage tank in various industries in the chemical mixing tank. Remove. After this, the wastewater is neutralized in a hydration tank, sand-filtered in a sand filtration tower, treated with a membrane separator, and adsorbed by passing the droop of the membrane through an activated carbon adsorption tower to remove dioxins. Configuration is adopted.

Utility Model Registration No. 3098878 JP-A-11-76755 JP 2000-210663 A

  However, in the conventional processing configurations as described in Patent Document 1 to Patent Document 3 described above, in order to remove particulate matter mixed with the dioxin in the waste water, Since the configuration combined with the adsorption process is employed, there are problems such as complicated increase in size of the facility and difficulty in reducing the operation cost of the purification process.

  In view of such a situation, an object of the present invention is to provide a wastewater treatment apparatus, a wastewater treatment system, and a wastewater treatment method that can easily remove dioxins mixed with a simple configuration.

The waste water treatment apparatus according to the present invention includes a treatment tank capable of storing waste water containing an open surface upward and containing dioxins and particulate matter, inflow means for flowing the waste water into the treatment tank, and the treatment tank A discharge port for discharging the stored waste water, and a flow direction of the waste water that flows into the treatment tank from the opening surface and flows out of the treatment tank and flows to the discharge port. And a multi-layered activated storage sheet disposed between the storage sheets and constituting a plurality of stacked activated carbon layers in the flow direction of the drainage. And
In the present invention, a water-permeable storage sheet can be carried out of the processing tank from the opening surface into the processing tank having the opening surface opened upward, and is supplied to the processing tank from the inflow means into the processing tank. A plurality of layers are provided in the direction of flow of the wastewater flowing to the outlet. Further, activated carbon is filled between the accommodation sheets to form a plurality of laminated activated carbon layers in the direction of drainage. The wastewater flowing in from the inflow means is an activated carbon layer. Particulate matter mixed in the wastewater and adhering most of all dioxins in the wastewater is filtered, and the dioxins remaining in the wastewater are adsorbed by the activated carbon. Is done.
For this reason, activated carbon is not only used for adsorption and removal of dioxins, but also filters and separates particulate matter to which most of the dioxins adhere, such as sand filtration for separating particulate matter separately. If the structure is not required and the structure can be simplified, and activated carbon breakthrough or clogging of particulate matter occurs, the activated sheet is discarded outside the treatment tank by lifting up the containing sheet, for example. It is only necessary to fill with new activated carbon, maintenance is easy, discarded activated carbon can be decomposed by, for example, incineration, dioxins can be prevented, and leakage of dioxins due to discarded activated carbon can be prevented. Waste water containing dioxins and particulate matter can be purified.

And in this invention, It is a waste water treatment apparatus of Claim 1, Comprising: The said inflow means and the said discharge port are arrange | positioned in the state in which the flow direction of the said waste water follows a substantially perpendicular direction, The said accommodation sheet | seat is It is preferable that one edge is fixed to the treatment tank and the other edge side is provided so as to be able to be turned back to the outside from the opening surface of the treatment tank.
In this invention, one edge of the storage sheet is fixed to the processing tank, and the other edge side is provided so as to be turned back from the opening surface of the processing tank to the outside of the tank.
For this reason, for example, by sequentially stacking the storage sheet and activated carbon in a state where the activated carbon is spread over a certain thickness on the storage sheet, the activated carbon component to be disposed of can be easily discharged out of the system and processed. Filling is easy and maintenance management is easy.

The waste water treatment apparatus according to the present invention includes a treatment tank capable of storing waste water containing an open surface upward and containing dioxins and particulate matter, inflow means for flowing the waste water into the treatment tank, and the treatment tank A discharge port for discharging the stored waste water, and a flow direction of the waste water that flows into the treatment tank from the opening surface to the outside of the treatment tank and flows into the treatment tank and flows into the discharge port. A plurality of juxtaposed storage containers, and activated carbons that are exchangeably filled in the storage containers and constitute a plurality of activated carbon layers in the flow direction of the drainage. And
According to the present invention, the container having water permeability and filled with activated carbon can be carried out from the opening surface to the outside of the processing tank, and flows into the processing tank from the inflow means. A plurality of activated carbon layers are arranged side by side in the flow direction of the waste water flowing to the discharge port provided in the treatment tank, and a plurality of stacked layers are formed in the flow direction of the waste water. The waste water flowing in from the inflow means is an activated carbon layer. Particulate matter mixed in the waste water and adhering most of all dioxins in the waste water is filtered, and the dioxins remaining in the waste liquid are adsorbed by the activated carbon. Is done.
For this reason, activated carbon is not only used for adsorption and removal of dioxins, but also filters and separates particulate matter to which most of the dioxins adhere, such as sand filtration for separating particulate matter separately. If the structure is not required, the structure can be simplified, and activated carbon breakthrough or particulate matter clogging occurs, the activated container in the container can be replaced by, for example, carrying the container out of the tank. Maintenance and maintenance are also easy. For used activated carbon to be discarded, dioxins can be decomposed, for example, by incineration. Dioxins can be prevented from leaking by the activated carbon to be discarded, and dioxins and particles can be easily configured with a simple structure. The waste water containing the state can be purified.

And in this invention, It is a waste water treatment apparatus of Claim 3, Comprising: The said inflow means and the said discharge port are arrange | positioned in the state in which the flow direction of the said waste water follows a substantially horizontal direction, The said storage container is It is preferable to adopt a configuration that is supported so as to be hung from the opening surface to the outside of the tank and to be carried out.
In this invention, in the state where the inflow means and the discharge port are disposed in a state in which the flow direction of the drainage is substantially along the horizontal direction, the storage containers are arranged in parallel in the substantially horizontal direction, and from the opening surface of the processing tank It becomes possible to carry it out by hanging support outside the tank.
For this reason, the activated carbon can be easily replaced with a simple configuration, and maintenance management can be facilitated.

Moreover, in this invention, it is the waste water treatment apparatus of Claim 3 or Claim 4, Comprising: It is preferable that the said container is set as the structure formed in the bag shape with the water-permeable sheet.
In this invention, the storage container is formed in a bag shape with the water-permeable sheet.
For this reason, a configuration in which activated carbon layers can be arranged in a stacked manner in the flow direction of the drainage 10 by filling activated carbon and arranging the storage containers in parallel, and a configuration that facilitates replacement of activated carbon can be easily obtained, and the configuration is simplified. And improvement in manufacturability can be easily obtained.

Furthermore, in this invention, it is the waste water treatment apparatus in any one of Claim 1, Claim 2, and Claim 5, Comprising: Let the said water-permeable sheet be a structure which is a net | network object made from a linen or a synthetic resin. Is preferred.
In the present invention, a net-like material made of linen or synthetic resin is used as the water-permeable sheet.
For this reason, it is easy to obtain, and it is possible to easily arrange the activated carbon layers in a stacked manner, and it is possible to easily obtain a configuration that facilitates replacement of the activated carbon, and it is easy to simplify the configuration, improve productivity, reduce costs, etc. can get.

And in this invention, It is the waste water treatment apparatus in any one of Claim 1 thru | or 6, Comprising: The said activated carbon layer is the said particulate matter in the said waste_water | drain, and the said waste_water | drain can be water_flowed through it. It is preferably composed of activated carbon having a particle size distribution that forms an aggregated layer of particulate matter.
In the present invention, the activated carbon layer is composed of activated carbon having a particle size distribution that forms particulate agglomerated layers of the particulate matter through which the particulate matter in the waste water is filtered to allow the waste water to pass therethrough.
For this reason, the particulate matter to which most of the dioxins adhere is filtered and separated by the agglomerated layer together with the filtration separation by the activated carbon layer, and the dioxins and the particulate matter can be highly removed.

Moreover, in this invention, it is a waste water treatment apparatus in any one of Claim 1 thru | or 7, Comprising: It is preferable that each said activated carbon layer was comprised with the activated carbon from which average particle diameter differs, respectively.
In this invention, the average particle diameter of the activated carbon which comprises each activated carbon layer is comprised in a different state.
For this reason, the particulate matter to which most of the dioxins adhere can be filtered and separated by each activated carbon layer while suppressing clogging in the activated carbon layer, and the dioxins and particulate matter can be stably and highly removed.

Furthermore, in this invention, it is a waste water treatment apparatus in any one of Claim 1 thru | or 8, Comprising: Any one of the said activated carbon layer is activated carbon mainly having a particle size of 1 mm or more and 5 mm or less. It is a configured large-diameter layer, and any one of the activated carbon layers is preferably a small-diameter layer composed of activated carbon mainly having a particle size of 0.1 mm to 3 mm. .
In the present invention, among the activated carbon layers, activated carbon mainly having a particle diameter of 1 mm or more and 5 mm or less is used as the activated carbon constituting the activated carbon layer serving as the large diameter layer, and 0. Activated carbon mainly having a particle size of 1 mm or more and 3 mm or less is used.
For this reason, for example, relatively large suspended particles of 1 μm or more, relatively small particles of sub-micron size, etc. due to the attachment of dioxins, such as in the wastewater generated by incinerator smoke washing Even in wastewater containing a large amount, particulate matter can be filtered and separated with high stability while suppressing clogging with the activated carbon layer, and dioxins and particulate matter can be removed with high stability. In particular, it is preferable to target waste water generated by smoke washing in an incinerator.
Here, when the particle diameter of the activated carbon of the large-diameter layer is smaller than 1 mm, the particulate matter easily forms an agglomerated layer in the vicinity of the upstream surface in the drainage direction of the activated carbon layer, and clogging occurs. May be easier. On the other hand, when the particle size is larger than 5 mm, most of the particulate matter is filtered and separated by the small-diameter layer, the load of the small-diameter layer is increased and clogging is likely to occur, and there is a possibility that a stable purification treatment cannot be obtained. Therefore, the large-diameter layer is composed of activated carbon mainly having a particle diameter of 1 mm or more and 5 mm or less. Further, if the particle diameter of the activated carbon in the small diameter layer is smaller than 0.1 mm, the particulate matter easily forms an agglomerated layer in the vicinity of the upstream surface in the direction of drainage of the activated carbon layer, resulting in clogging. May be easier. On the other hand, when it becomes coarser than 3 mm, the particulate matter may not be filtered and separated. Therefore, the small-diameter layer is composed of activated carbon mainly having a particle size of 0.1 mm or more and 3 mm or less.

Furthermore, in the present invention, the waste water treatment apparatus according to claim 9, wherein each activated carbon layer is preferably configured such that the large-diameter layer and the small-diameter layer are alternately laminated.
In this invention, an activated carbon layer is comprised in a laminated form in a state where large-diameter layers and small-diameter layers are alternately laminated.
For this reason, the filtration load of a large diameter layer and a small diameter layer becomes substantially uniform, and dioxins and particulate matter can be removed highly stably.

And in this invention, it is the waste water treatment apparatus in any one of Claim 1 thru | or 10, Comprising: The liquid level position detection means arrange | positioned in the said processing tank and detects the liquid level position in the said processing tank And a notification means for notifying the fact that the liquid level detection means detects that the liquid level of the waste water that has flowed into the processing tank has reached a predetermined liquid level position, and It is preferable to do.
In this invention, when it is detected by the liquid level position detecting means arranged in the processing tank that the liquid level of the wastewater that has flowed into the processing tank has reached the predetermined liquid level position, the notification means notifies the fact. Inform.
For this reason, for example, even if the drainage is not properly discharged from the discharge port due to clogging due to long-term use, etc. and stays in the treatment tank and the water surface position becomes high, etc., by notifying the administrator etc., There is no inconvenience such as overflow of waste water from the treatment tank, and the purification treatment can be performed stably.

Moreover, in this invention, it is a waste water treatment apparatus in any one of Claim 1 thru | or 11, Comprising: The said activated carbon layer is comprised in the state laminated | stacked on a substantially perpendicular direction, The said inflow means is the said waste_water | drain. It is preferable to use a configuration that allows the water to flow into the treatment tank by watering.
In the present invention, the activated carbon layer is laminated in a state of being laminated in a substantially vertical direction, and the waste water is caused to flow into the treatment tank from the inflow means by watering.
For this reason, while being able to process on the whole surface in the distribution direction of the waste water in the activated carbon layer, for example, it is possible to reduce the impact that the waste water flowing in from the inflow means collides in a state of falling on the activated carbon layer. Even if an agglomerated layer is formed, the agglomerated layer is not destroyed by impact, and a filtration effect by the agglomerated layer is obtained, so that a highly purified treatment can be stably performed.

Furthermore, in the present invention, the waste water treatment apparatus according to any one of claims 1 to 12, wherein the activated carbon layer is configured to be stacked in a substantially vertical direction, and the waste water from the inflow means is disposed. A flow rate adjusting means for adjusting the inflow amount and the discharge amount of the waste water from the discharge port so that the liquid level of the waste water stored in the treatment tank is located above the activated carbon layer; It is preferable to do.
In the present invention, the activated carbon layer is laminated in a state of being laminated in a substantially vertical direction, and the liquid level position of the wastewater stored in the treatment tank is positioned above the activated carbon layer by the flow rate adjusting means so that the inflow means Adjust the amount of wastewater flowing in and the amount of wastewater discharged from the outlet.
For this reason, it is possible to reduce the impact such that the influent wastewater collides with the state where it falls on the activated carbon layer, and it is possible to obtain a state in which the wastewater flows substantially uniformly over the entire surface of the activated carbon layer in the flow direction of the wastewater, and filtration. Even if an agglomerated layer is formed by the separated particulate matter, the agglomerated layer is not destroyed by impact, a filtration effect by the agglomerated layer is obtained, and a highly purified treatment can be stably performed.

In the wastewater treatment system according to the present invention, a plurality of wastewater treatment apparatuses according to any one of claims 1 to 13 are connected in parallel so that the inflow means communicate with each other and the discharge ports communicate with each other. It is characterized by.
According to the present invention, a plurality of waste water treatment apparatuses according to any one of claims 1 to 13 are connected in parallel so that inflow means communicate with each other and discharge ports communicate with each other.
For this reason, for example, in any one of the wastewater treatment apparatuses, even if the treatment is stopped by exchanging activated carbon or the like, the purification treatment can be continued in another wastewater treatment apparatus, and a stable wastewater purification process can be obtained. Furthermore, the processing efficiency can be improved by improving the processing capacity, and it is also easy to selectively change the processing capacity by selectively switching the waste water treatment equipment used for processing according to the pollution status and processing load of the waste water. Cleans well.

A wastewater treatment system according to the present invention is characterized in that a plurality of wastewater treatment apparatuses according to any one of claims 1 to 13 are connected in series so that the inflow means and the discharge port communicate with each other. To do.
In the present invention, a plurality of waste water treatment apparatuses according to any one of claims 1 to 13 are connected in series so that the inflow means and the discharge port communicate with each other.
For this reason, for example, even if the treatment capacity such as activated carbon breaks down in any one of the wastewater treatment devices, it can be highly purified by purification treatment in another wastewater treatment device. In addition, for example, by replacing the activated carbon of the wastewater treatment device by providing a flow path that bypasses the wastewater treatment device without allowing the inflow means and the discharge port to communicate with each other, for example, the wastewater treatment device. Efficient purification treatment can be easily achieved with a simple configuration providing a bypass path, and stable wastewater purification treatment can be easily obtained, and the processing capacity can be easily changed selectively depending on the number of wastewater treatment devices in series. Can be easily obtained with a simple configuration in which a bypass path is provided.

The waste water treatment method according to the present invention is a waste water treatment method for purifying waste water containing dioxins and particulate matter, wherein activated carbon is filled between the accommodation sheets having water permeability arranged in a plurality of layers. When the waste water is circulated through the activated carbon layer formed in a plurality of layers and the particulate matter is filtered through the activated carbon layer, and the flow resistance through which the waste water flows through the activated carbon layer is increased by this treatment step. A discharge step of discharging the activated carbon constituting the activated carbon layer located upstream in the flow direction of the waste water to the outside in a state where it is scraped off by the containing sheet, and an incineration for incinerating the activated carbon discharged in the discharge step And a processing step.
In the present invention, in the treatment step, activated carbon is filled between the water-permeable accommodation sheets arranged in a plurality of layers, and the waste water is circulated through the activated carbon layer configured in a plurality of layers, so that the particulate matter is made into the activated carbon layer. Filter. And when the distribution resistance through which the wastewater flows through the activated carbon layer in the treatment process increases, the activated sheet constituting the activated carbon layer located upstream in the distribution direction of the wastewater in the discharge process is wound up on the containing sheet. Discharge out of the system. The activated carbon discharged in this discharge process is incinerated in the incineration process.
For this reason, activated carbon is not only used for adsorption and removal of dioxins, but also filters and separates particulate matter to which most of the dioxins adhere, such as sand filtration for separating particulate matter separately. The structure is not required, the structure can be simplified, and when the distribution resistance increases due to breakthrough of activated carbon or clogging of particulate matter, the activated sheet is removed from the system by raising the containing sheet in the discharge process. It only needs to be discarded and refilled with new activated carbon, maintenance is easy, and the discarded activated carbon can be incinerated in the incineration process to decompose dioxins, preventing leakage of dioxins due to the discarded activated carbon. The wastewater containing dioxins and particulate matter can be easily purified with a simple configuration.

The waste water treatment method according to the present invention is a waste water treatment method for purifying waste water containing dioxins and particulate matter, and has a plurality of containers that have water permeability and are filled with activated carbon to form an activated carbon layer. A treatment step of circulating the waste water through a plurality of activated carbon layers arranged side by side and filtering the particulate matter through the activated carbon layer, and a flow resistance through which the waste water flows through the activated carbon layer. Increases, the discharge step of discharging the storage container constituting the activated carbon layer located upstream in the flow direction of the waste water and discharging the filled activated carbon, and the activated carbon discharged in this discharge step And an incineration processing step of incinerating
In this invention, in the treatment process, the waste water is circulated through a plurality of activated carbon layers that are water-permeable, filled with activated carbon inside to form an activated carbon layer, and are arranged in a plurality of layers to form a particulate matter. Is filtered through an activated carbon layer. And when the distribution resistance through which the wastewater flows through the activated carbon layer increases in the treatment process, the container that constitutes the activated carbon layer positioned upstream in the distribution direction of the wastewater is discharged out of the system and filled in the discharge process. The activated carbon is discharged. The activated carbon discharged in this discharge process is incinerated in the incineration process.
For this reason, activated carbon is not only used for adsorption and removal of dioxins, but also filters and separates particulate matter to which most of the dioxins adhere, such as sand filtration for separating particulate matter separately. The configuration is not required, the configuration can be simplified, and when the distribution resistance increases due to the breakthrough of activated carbon or clogging of particulate matter, the example storage container is taken out of the system in the discharge process. It is only necessary to replace the activated carbon, and maintenance management is easy. The used activated carbon to be discarded can be incinerated in the incineration process to decompose dioxins, and it is easy to prevent dioxins from leaking due to the discarded activated carbon. With such a configuration, wastewater containing dioxins and particulate matter can be purified easily.

Hereinafter, the best mode for carrying out the present invention will be described in detail.
In the present embodiment, for example, a wastewater treatment system in which a wastewater treatment device that treats wastewater discharged from smoke cleaning equipment of an incinerator will be described, but not limited to the system configuration, the wastewater treatment device is used alone. It is good also as a form. The system configuration is exemplified by a configuration in which wastewater treatment devices are connected in two series and two in parallel, but a simple parallel connection or a simple series connection configuration may be used, and the number of wastewater treatment devices to be connected is appropriately designed. Moreover, although the structure which distribute | circulates waste water in a substantially vertical direction and performs a purification process is illustrated as a waste water treatment apparatus, you may make it the structure which distribute | circulates in a substantially horizontal direction and performs a purification process, for example.

[Configuration of wastewater treatment system]
FIG. 1 is a block diagram showing a schematic configuration of a wastewater treatment system according to the present invention.
In FIG. 1, 100 is a waste water treatment system, and this waste water treatment system 100 is a system for treating waste water discharged from, for example, smoke cleaning equipment of an incinerator. This waste water treatment system 100 is connected to a raw water pipe 110 through which waste water flows.
A bypass unit 200 is connected to the raw water pipe 110. This detour means 200 has a detour pipe 210 having a detour valve 211 that is connected at one end to the raw water pipe 110 and through which drainage can flow. The other end of the bypass pipe 210 is connected to an oil-impregnated pit 220 into which drainage water flowing through the bypass pipe 210 is introduced and stored. Various types of drainage can flow into the oil retaining pit 220. The oil-impregnated pit 220 is connected to a processing facility (not shown) that separately processes the wastewater to be stored, and an outflow pipe 230 that circulates to a tank that stores the wastewater for processing at these processing facilities.

Further, the waste water treatment system 100 connected to the raw water pipe 110 includes a branch pipe 120. The branch pipe 120 branches on the downstream side opposite to the side connected to the raw water pipe 110. A branch valve 121 is provided at each branch portion on the downstream side of the branch pipe 120. A waste water treatment device 300 into which waste water flowing through the branch pipe 120 flows is connected in parallel to each downstream end of the branch pipe 120. Further, each of the wastewater treatment devices 300 connected in parallel is connected to a connection pipe 130 provided with a connection valve 131 for discharging the wastewater stored in the wastewater treatment device 300 to the outside of the tank. Furthermore, waste water treatment devices 300 into which waste water flowing through the connection pipes 130 flows are connected in series to the ends of the connection pipes 130. The downstream wastewater treatment apparatus 300 connected in series is connected to a collecting pipe 140 through which stored wastewater flows out of the tank. In the collecting pipe 140, the upstream side connected to the waste water treatment apparatus 300 is branched into a plurality of branches, and the downstream side is connected to one.
Further, the waste water treatment system 100 is connected between the vicinity of the branching end on the downstream side of the branch pipe 120 and the connecting pipe 130, and the waste water flowing through the branch pipe 120 is connected in series and positioned upstream. An upstream bypass pipe 150 is provided so as to flow into the downstream wastewater treatment device 300 without flowing into the wastewater treatment device 300. Each upstream bypass pipe 150 is provided with an upstream bypass valve 151. The waste water treatment system 100 is connected between the connecting pipe 130 and the vicinity of the upstream end where the collecting pipe 140 branches and is connected to the upstream bypass pipe 150, and the upstream waste water treatment apparatus 300. A downstream bypass pipe 160 is provided for allowing wastewater flowing out from the wastewater and flowing through the upstream bypass pipe 150 to flow into the collecting pipe 140 without flowing into the downstream wastewater treatment apparatus 300. Each downstream bypass pipe 160 is provided with a downstream bypass valve 161.
In addition, each valve in the wastewater treatment system 100 is opened and closed by a control device (not shown) that is provided separately and constitutes a flow rate adjusting unit, such as an electromagnetic valve. In addition, it is good also as a structure opened and closed manually.

Further, for example, a rainwater pit 410 is connected to the downstream end of the collecting pipe 140, and wastewater treated by the wastewater treatment system 100 is stored in the rainwater pit 410 together with rainwater.
A treated water pipe 420 is connected to the rainwater pit 410. Then, the wastewater stored in the rainwater pit 410 is separately treated, for example, in a sewage treatment facility via the treated water pipe 420 and discharged into a river or the like, or used for cooling water or the like. In addition, when using as cooling water, you may mix with seawater etc. and may use.

[Configuration of wastewater treatment system]
Next, the configuration of the wastewater treatment apparatus constituting the wastewater treatment system 100 will be described in detail with reference to the drawings.
FIG. 2 is a cross-sectional view showing a schematic configuration of a wastewater treatment apparatus constituting the wastewater treatment system. FIG. 3 is a conceptual diagram schematically showing the configuration of the activated carbon layer in the wastewater treatment apparatus.

As shown in FIG. 2, the waste water treatment apparatus 300 includes a substantially box-shaped treatment tank 310 having an opening surface 311 on the upper surface. For example, the processing tank 310 is configured in a substantially box shape having a side of about 5 m and a height of about 2 m.
An inlet 312 is formed in the upper part of the processing tank 310. The inflow port 312 is connected to a water spray means 320 as an inflow means to which the downstream end of the branch pipe 120 is connected. One end side of the watering means 320 is connected to the branch pipe 120, and the other end side is branched into a plurality of water spray pipes 321 arranged substantially in parallel with the axial direction being substantially along the horizontal direction. These sprinkling pipes 321 are provided with a plurality of sprinkling holes 322 on the surface facing the bottom surface of the treatment tank 310 on the peripheral surface, and the waste water 10 flowing through the branch pipe 120 is sprinkled into the treatment tank 310.
Further, the watering means 320 is provided with a flow meter (not shown) as a liquid level position detecting means. This flow meter is provided on the end side connected to the branch pipe 120 of the water spray means 320, and detects the flow rate of the waste water 10 flowing from the branch pipe 120 into the treatment tank 310. This flow meter is connected to the control device, and outputs a detection signal relating to the detected flow rate of the drainage 10 to the control device.

Further, at the bottom of the processing bath 310, a so-called grating-like grid-like or saw-like bottom-up bottom 330 is disposed. The bottom-up bottom portion 330 is provided in a state in which a water collection chamber 331 that is a gap of about 0.2 m is defined between the bottom surface of the treatment tank 310 and the bottom. A water-permeable sheet (not shown) is provided on the upper surface of the bottom-up bottom portion 330. A discharge port 313 is formed at the bottom of the treatment tank 310 so as to face the water collection chamber 331. A connecting pipe 130 and a collecting pipe 140 are connected to the discharge port 313, and the waste water 10 stored in the processing tank 310 is discharged out of the tank.
Furthermore, a partition plate 340 is provided in the processing tank 310 in a state where the plane direction is substantially along the vertical direction from the upper surface of the bottom-up bottom portion 330 and faces the inlet 312. The partition plate 340 defines a processing chamber 341 and a flow chamber 342 communicating with the water collecting chamber 331 above the bottom-up bottom portion 330 in the processing tank 310. The partition plate 340 is formed slightly lower than the wall surface height of the processing tank 310, and the drainage 10 can overflow from the upper end of the partition plate 340 from the processing chamber 341 to the flow chamber 342.

And in the processing tank 310, as shown, for example in FIG. 3, the some accommodation sheet | seat 350 arrange | positioned in the processing chamber 341 is provided in the laminated form.
The accommodation sheet 350 is a resin net that is a net-like material made of linen or synthetic resin, for example, and is a flexible sheet having water permeability. And the accommodation sheet 350 is fixed to the wall surface position which faces the process chamber 341 by one wall surface facing in the direction which cross | intersects the axial direction of the water spray pipe 321 in the processing tank 310, and the other edge becomes a free end. The grip portion (not shown) provided on the edge opposite to the one edge side can be turned back one by one to the one edge side, which is a fixed end that intersects the axial direction of the water spray pipe 321.
Then, activated carbon is spread on the storage sheet 350 in a state of being interposed between the storage sheets 350, and the activated carbon is approximately vertically oriented in the processing chamber 341 in a state where the storage sheets 350 and the activated carbon layers 360 of the activated carbon are alternately stacked. A layer 360 is stacked. Although FIG. 3 shows a state where a gap is provided between the activated carbon layers 360 for convenience of explanation, the activated carbon is actually spread and filled in the processing chamber 341 without a gap.

As the activated carbon constituting each activated carbon layer 360, any one formed from various raw materials can be used. In addition, pulverized materials such as charcoal can also be targeted.
The activated carbon has an average particle size of 0.1 mm or more, preferably 0.5 mm or more, which is a particle size by which the activated carbon layer 360 functions as a filter to filter particulate matter such as dust mixed in the waste water 10. Those having an average particle diameter are used. Here, when the average particle size of the activated carbon is smaller than 0.1 mm, the filtration efficiency of the particulate matter in one activated carbon layer 360, particularly the uppermost activated carbon layer 360 is increased, and clogging in the uppermost activated carbon layer 360 is clogged. There is a risk that the wastewater treatment cannot be performed stably due to rapid progress. On the other hand, when the average particle diameter of the activated carbon exceeds 5 mm, there is a possibility that inconveniences such as generation of drift and deterioration of the filtration function may occur. Therefore, those having an average particle diameter of preferably 0.5 mm to 4 mm, more preferably 1 mm to 3 mm are used.
Further, the activated carbons of the activated carbon layers 360 may have the same particle diameter, but preferably different particle size distributions are different. For example, a layer in which the activated carbon is relatively coarse and a layer in which the activated carbon is relatively fine may be repeatedly formed sequentially from the top layer.

In addition, the flow chamber 342 is partitioned and formed with the opposite wall surface of the processing tank 310 with a width of, for example, about 0.3 m, and the waste water 10 that flows through the processing chamber 341 and flows into the water collecting chamber 331 enters the processing chamber 341. The inflow is possible due to the head difference of the inflowing wastewater 10.
The processing tank 310 is provided with a level sensor (not shown) as a liquid level position detecting unit facing the flow chamber 342. This level sensor detects the liquid level position of the drainage 10 flowing into the flow chamber 342 and outputs a detection signal related to the detected liquid level position to the control device.
Further, the treatment tank 310 is provided with an overflow pipe 370 that discharges the waste water 10 in the flow chamber 342 to the outside of the tank at a height position that is a predetermined water head difference. The overflow pipe 370 allows the overflowed drainage 10 to flow into the oil retaining pit 220 of the bypass means 200, for example. In the case of the overflow pipe 370 of the wastewater treatment apparatus 300 located on the upstream side, it may be allowed to flow into the wastewater treatment apparatus 300 on the downstream side.

[Treatment operation of wastewater treatment system]
Next, the treatment operation of the waste water 10 in the waste water treatment system 100 will be described.
In addition, although the structure which processes the waste_water | drain 10 by the automatic control by a control apparatus is illustrated, it is good also as a structure which opens and closes a valve suitably manually.

First, a treatment process for purifying the waste water 10 is performed under the control of the control device.
That is, the control device opens the branch valve 121 of the branch pipe 120 of the waste water treatment system 100 and the connection valve 131 of the connection pipe 130 and causes the waste water 10 to flow into the branch pipe 120 from the raw water pipe 110. Then, the wastewater 10 flowing through the branch pipe 120 is branched and flows into the wastewater treatment apparatus 300. The wastewater 10 that has flowed into the wastewater treatment apparatus 300 flows into the water spray means 320 connected to the branch pipe 120 and flows into the treatment chamber 341 from the water spray pipe 321, for example, water is sprinkled.
The drainage water 10 sprayed from the sprinkling pipe 321 is poured onto the laminated activated carbon layer 360, flows through the activated carbon layer 360, and is collected in the water collecting chamber 331. When the waste water 10 flows through the activated carbon layer 360, particulate matter mixed in the activated carbon layer 360 is filtered into the activated carbon layer 360, and some dioxins dissolved in the waste water 10 are adsorbed and removed by the activated carbon. . In the filtration and adsorption purification treatment, most of the dioxins in the waste water 10 generated by the smoke washing adhere to the particulate matter, and the remaining small amount of dioxins is dissolved. As a result, the activated carbon layer 360 is composed of activated carbon whose particle size has been adjusted, so that particulate matter to which most of the dioxins in the waste water 10 adheres is efficiently filtered and separated.
Then, the wastewater 10 collected in the water collection chamber 331 flows into the downstream wastewater treatment device 300 from the discharge port 313 through the connecting pipe 130, and as described above, particulate matter is filtered and dioxin is filtered. Is adsorbed. Then, the wastewater 10 purified by the downstream wastewater treatment device 300 and collected in the water collection chamber 331 flows into the rainwater pit 410 from the discharge port 313 through the collecting pipe 140.

Moreover, when a certain amount of purification treatment proceeds, the particulate matter trapped in the activated carbon layer 360 forms an agglomerated layer that becomes a so-called cake layer. Due to the formation of the agglomerated layer by the particulate matter, the wastewater 10 that is sequentially introduced and flows through the activated carbon layer 360 is filtered not only in the activated carbon layer 360 but also in the agglomerated layer, the particulate matter in the drainage 10 is filtered, Particulate matter in the waste water 10 to which dioxins adhere is more efficiently filtered and separated. Furthermore, when the water flow resistance of the drainage water 10 increases due to the formation of the agglomerated layer, for example, as shown in FIG. 2, the water surface of the drainage water 10 that flows upward from the upper surface of the activated carbon layer 360 is positioned, and the activated carbon layer 360 is formed. The agglomerated layer is prevented from being broken by the collision of the drained water 10 and the agglomerated layer is stably formed.
As the purification process further proceeds and the thickness dimension of the agglomerated layer gradually increases, the water flow resistance of the drainage 10 increases. For example, as shown in FIG. 2, the difference in the water level between the treatment chamber 341 and the flow chamber 342 occurs. Occurs. When the water flow resistance of the drainage 10 increases to some extent, the water level in the flow chamber 342 is further lowered, and the level sensor detects that the water level has decreased to a predetermined water level. When the control device recognizes the detection signal output from the level sensor, the control device notifies, for example, a buzzer or a warning light that is a notification means to an operator or a manager, An e-mail is sent to a terminal device used by a certain worker or administrator.
In addition, the control device closes the branch valve 121 of the branch pipe 120 connected to the wastewater treatment apparatus 300 to be notified or the connection valve 131 of the connection pipe 130, and the upstream bypass pipe 150 that is in a side-by-side relationship. The upstream bypass valve 151 or the downstream bypass valve 161 of the downstream bypass pipe 160 is opened, and the wastewater 10 does not flow into the wastewater treatment apparatus 300 that is the subject of notification, but the upstream bypass pipe 150 or the downstream bypass pipe 160 is used. The wastewater treatment apparatus 300 and the collecting pipe 140 on the downstream side are allowed to flow and the treatment of the wastewater 10 is continued.

On the other hand, the worker or manager who has recognized the notification starts to perform the discharge process.
That is, the watering means 320 in the target wastewater treatment apparatus 300 is removed, and the holding portion of the accommodation sheet 350 on which the activated carbon constituting the uppermost activated carbon layer 360 is spread is hooked by a hanging device or the like, as shown in FIG. As described above, the activated carbon is carried out of the tank so as to be turned from the opening surface 311 to the outside of the tank toward the fixed end of the accommodation sheet 350. For carrying out the activated carbon, the conveyance vehicle may be stopped adjacent to the treatment tank 310 so that the activated vehicle is discharged to a conveyance vehicle, for example. In the activated carbon discharge process, in the treatment stage where the adsorption ability of activated carbon is not broken, only the accommodation sheet 350 corresponding to the uppermost activated carbon layer 360 or the accommodation sheet corresponding to the activated carbon layer 360 from the uppermost to a predetermined number of stages. What is necessary is just to turn over 350 sequentially and to discharge | release activated carbon.
And the accommodation sheet | seat 350 which discharged | emitted activated carbon should just lay down again in the process chamber 341, and lay down new activated carbon, and the new activated carbon layer 360 should just be formed.

Moreover, the activated carbon discharged in the discharge process is processed in the incineration process.
That is, activated carbon is drained or dried as appropriate, and incinerated with an incinerator. During the incineration process, the incineration is performed at a temperature at which dioxins are sufficiently decomposed. That is, the dioxins are sufficiently decomposed by firing at a temperature at which the activated carbon is burned off and becomes only ash.

[Effect of wastewater treatment system]
As described above, in the above-described embodiment, the water-permeable storage sheet 350 can be carried out of the processing tank 310 from the opening surface 311 into the processing tank 310 having the opening surface 311 opened upward, and the water spray means 320. Are provided in a stacked manner in the flow direction of the drainage 10 that flows into the treatment tank 310 and flows to the discharge port 313 provided in the treatment tank 310. Further, the activated carbon layer 360 is configured to be a plurality of stacked layers in the flowing direction of the drainage 10 by filling the storage sheets 350 with activated carbon. The waste water 10 flowing from the sprinkling means 320 is the activated carbon layer 360. The particulate matter mixed in the waste water 10 and adhering most of all dioxins in the waste water 10 is filtered and dissolved in the waste water 10. Dioxins are adsorbed by activated carbon.
For this reason, activated carbon is not only used for adsorption and removal of dioxins, but also filters and separates particulate matter to which most of the dioxins adhere, such as sand filtration for separating particulate matter separately. No configuration is required and the configuration can be simplified. Furthermore, when breakthrough of activated carbon or clogging of particulate matter occurs, for example, a discharge process is performed in which the activated carbon is discarded outside the treatment tank 310 by lifting up the storage sheet 350 and filled with new activated carbon again. Maintenance is easy, and the activated carbon that has been discarded can be incinerated and decomposed together with the dioxins captured by incineration during the incineration process, for example, and leakage of dioxins due to discarded activated carbon can be prevented. The waste water 10 containing dioxins and particulate matter can be easily purified with a simple configuration.

And one edge of the accommodation sheet 350 is fixed to the processing tank 310, and the other edge side is provided so that it can be turned back from the opening surface of the processing tank 310 to the outside of the tank.
For this reason, for example, by sequentially stacking the accommodation sheet 350 and activated carbon in a state where activated carbon is spread over the accommodation sheet 350 to a certain thickness, the activated carbon component to be discarded can be easily discharged out of the tank, In the filling, it is only necessary to relay the storage sheet 350 in the processing chamber 341 and spread the activated carbon, and the work can be easily performed with a simple configuration, and the maintenance and management can be improved.

Further, by using a net cloth or a synthetic resin net-like material as the accommodation sheet 350, an activated carbon layer 360 can be easily and inexpensively arranged in a stacked manner, and the configuration in which the activated carbon can be easily exchanged can be easily obtained.
Therefore, simplification of the configuration, improvement of manufacturability, reduction of costs, and the like can be easily obtained.

And the activated carbon layer 360 is comprised using the thing of the particle size distribution which forms the aggregated layer of the particulate matter in which the particulate matter in the waste_water | drain 10 can be filtered, and the waste_water | drain 10 can permeate | transmit as activated carbon.
For this reason, the particulate matter to which most of the dioxins adhere can be separated by filtration using the activated carbon layer 360 and filtration by the aggregation layer, and dioxins and particulate matter can be removed to a high degree.

Further, the activated carbon constituting each activated carbon layer 360 is formed in a state where the average particle diameter is different, that is, a relatively coarse layer that becomes a large diameter layer and a relatively fine layer that becomes a small diameter layer.
Therefore, particulate matter to which most of the dioxins adhere can be filtered and separated by each activated carbon layer 360 while suppressing clogging in the activated carbon layer 360, and the dioxins and particulate matter can be stably and highly removed. .

Moreover, among the activated carbon layers 360, activated carbon mainly having a particle diameter of 1 mm or more and 4 mm or less is used as the activated carbon constituting the relatively coarse activated carbon layer 360 which is a large-diameter layer, and a relatively small-diameter layer is formed. As the activated carbon constituting the fine activated carbon layer 360, activated carbon mainly having a particle size having a distribution in the range of 0.1 mm to 3 mm is used.
For this reason, for example, in the waste water 10 generated by incinerator smoke washing, dioxins adhere to relatively large diameter suspended particles of 1 μm or more, relatively small diameter fine particles of about submicron, etc. Even in the waste water 10 containing a large amount, the activated carbon layer 360 can filter and separate particulate matter with high stability while suppressing clogging, and can stably remove dioxins and particulate matter with high stability. In particular, the wastewater 10 generated by the incinerator's smoke cleaning can be maintained and operated in a configuration that can be stably and highly purified with a simple configuration without requiring multistage treatment such as agglomeration treatment, sand filtration treatment, and adsorption treatment. It is easy and suitable.

Further, the activated carbon layer 360 is formed in a stacked state in a state where the large diameter layer and the small diameter layer are alternately stacked.
For this reason, the filtration load of a large diameter layer and a small diameter layer becomes substantially uniform, and dioxins and particulate matter can be removed more stably and highly.

Further, based on the liquid level position of the drainage 10 detected by the level sensor disposed in the processing tank 310, the control device determines that the drainage 10 that has flowed into the processing chamber 341 has reached a predetermined liquid level position. Inform the worker or manager by a buzzer, warning light, or e-mail.
For this reason, for example, even if the drainage 10 is not properly discharged from the discharge port 313 due to clogging due to long-term use or the like and remains in the treatment tank 310 and the water surface position becomes high, the manager is notified. Thus, there is no inconvenience such as overflow of the waste water 10 from the treatment tank 310, and the purification treatment can be performed stably.
Furthermore, the drainage 10 does not flow into the target wastewater treatment apparatus 300 or the inflow amount is reduced by appropriately opening and closing each valve with the control device or adjusting the flow rate based on the flow meter. To do.
For this reason, the purification process can be performed more stably without causing an overflow or the like more reliably, and an easier operation of the purification process can be obtained by automatic control by the control device.

Then, a plurality of activated carbon layers 360 are constructed in a layered state in a substantially vertical direction in a substantially box-shaped treatment tank 310 opened upward, and the waste water 10 is caused to flow into the treatment tank 310 from the watering means 320 by watering. ing.
For this reason, while being able to purify almost the entire surface of the activated carbon layer 360 in the flow direction of the waste water 10, it is possible to reduce the impact that the waste water 10 that has flowed in from the water sprinkling means 320 collides with the activated carbon layer 360 in a falling state, Even if an agglomerated layer is formed by the particulate matter separated by filtration, the agglomerated layer is not destroyed by impact, and a filtration effect by the agglomerated layer is obtained, so that a highly purified treatment can be stably performed.

In addition, the activated carbon layer 360 is laminated in a substantially vertical direction in a substantially box-shaped treatment tank 310 opened upward, and the control of the control device determined based on the liquid level position detected by the level sensor, The inflow amount of the waste water 10 from the sprinkling means 320 and the discharge amount of the waste water 10 from the discharge port 313 are adjusted so that the liquid level of the waste water 10 stored in the treatment tank 310 is located above the activated carbon layer 360. . For example, the inflow amount and the outflow amount of the drainage 10 are adjusted by adjusting the opening degree of each valve or the flow rate of the drainage 10 supplied from the raw water pipe 110.
As a result, it is possible to reduce the impact that the inflowing wastewater 10 collides with the state of falling on the activated carbon layer 360, and the wastewater 10 flows almost uniformly over the entire surface of the activated carbon layer 360 in the flow direction of the wastewater 10. In addition, even if an agglomerated layer is formed by the particulate matter separated by filtration, the agglomerated layer is not destroyed by impact, a filtration effect by the agglomerated layer is obtained, and a highly purified treatment can be stably performed. In particular, since the water resistance is relatively low at the beginning of formation of the aggregated layer, the activated carbon layer 360 can be exposed from the liquid surface, which is effective in such a case.

A plurality of waste water treatment apparatuses 300 are connected in parallel so that the water sprinkling means 320 communicate with each other and the discharge port 313 communicates.
For this reason, for example, in any one of the wastewater treatment apparatuses 300, even when the treatment is stopped by replacement of activated carbon or the like, the purification treatment can be continued in the other wastewater treatment apparatus 300, and the stable purification treatment of the wastewater 10 can be obtained. Furthermore, the processing capacity is improved by selectively switching the waste water treatment apparatus 300 used for processing according to the improvement of the processing efficiency due to the improvement of the processing capacity, the contamination state of the waste water 10 and the processing load of the waste water treatment apparatus 300. Can be easily performed, and purification can be performed efficiently.
Further, a plurality of waste water treatment apparatuses 300 are connected in series so that the water sprinkling means 320 and the discharge port 313 communicate with each other.
For this reason, for example, even if activated carbon breaks through or becomes clogged in any one of the wastewater treatment devices 300, even if the treatment capacity is reduced, the purification treatment by other wastewater treatment devices 300 is highly purified. it can.
Further, for example, the upstream side bypass pipe 150 or the downstream side bypass which is a flow path in which the water sprinkling means 320 and the discharge port 313 communicate with each other of the waste water treatment device 300 to bypass the waste water 10 without flowing into the waste water treatment device 300. A tube 160 is provided.
For this reason, stable purification treatment of the waste water 10 can be easily obtained with a simple configuration in which the upstream bypass pipe 150 and the downstream bypass pipe 160 that bypass the waste water 10 without flowing in, such as replacement of activated carbon in the waste water treatment apparatus 300, are provided. In addition, the processing capacity can be easily changed selectively depending on the number of waste water treatment apparatuses 300 in series, and an efficient purification process can be easily obtained with a simple configuration that provides a bypass path.

[Modification of Embodiment]
The aspect described above shows one aspect of the present invention, and the present invention is not limited to the above-described embodiment, and within the scope of achieving the objects and effects of the present invention. Needless to say, the modifications and improvements are included in the contents of the present invention. In addition, the specific structure and shape in carrying out the present invention may be used as other structures and shapes within the scope of achieving the object and effect of the present invention.

That is, the wastewater treatment apparatus of the present invention is not limited to a system configuration in which a plurality of wastewater treatment apparatuses are connected, and has a single tank configuration, or a plurality of treatment chambers 341 are partitioned in one tank, so that a plurality of wastewater treatment processes are substantially performed. For example, the apparatus 300 may be connected. Moreover, although four tanks were illustrated as a system configuration, not only four tanks but two or more tanks can be connected. Furthermore, the system configuration is not limited to the parallel and series configurations, and may be only parallel or only series.
In addition, the processing has been described in a substantially box-shaped processing tank 310 whose upper surface is opened. For example, during the purification process, the activated carbon is transported such that the upper surface is closed with a lid or the like and the storage sheet 350 is turned over. In this case, any structure may be used as long as the lid can be removed to open the upper surface.

In addition, although the sheet-shaped accommodation sheet 350 is used in a stacked state, the activated carbon is filled in between to form an activated carbon layer 360, and the activated carbon is discharged and replaced by turning over as appropriate. The sheet 350 is formed into a bag shape to form a storage container, and the storage container is filled with activated carbon. And the storage container which accommodated activated carbon is laminated | stacked in the state arranged in parallel by the flow direction of the waste_water | drain 10. FIG. Specifically, as in the above-described embodiment, in a configuration in which the drainage 10 flows in from above and flows out from the bottom of the treatment tank 310 so that the flow direction becomes a substantially vertical direction, the storage containers are stacked so as to be stacked. Let Further, in the case where the flow direction is a substantially horizontal direction, a state in which the storage container is suspended is provided in parallel. In the case of hanging and supporting, it is preferable to use a structure using a lattice or a frame so that the activated carbon is not biased to the lower part of the container. And it is only necessary to lift and carry the entire container from the processing tank 310 by making it into a bag shape, and the workability can be further improved. Furthermore, by adopting a bag structure that can be incinerated such as a hemp bag, it is easy to incinerate the entire storage container, and workability can be further improved.
Furthermore, although the storage sheet 350 has been described by turning it back with a suspension device or the like, a moving body such as a pulley that travels on the guide rail provided in the processing tank 310 with the edge of the storage sheet 350 provided with a grip portion in advance. Or the like, and the moving body of the target wastewater treatment apparatus 300 may be moved by a guide rail and automatically turned over to discharge the activated carbon.
Moreover, although the water-permeable sheet was provided on the upper surface of the bottom-up bottom portion 330, as shown in FIG. 3, for example, when the accommodation sheet 350 is laid just above the bottom-up bottom portion 330, the water-permeable sheet may not be used.

  And as the inflow of the waste_water | drain 10, you may make it the structure made to just flow in from the inflow port 312 instead of using the sprinkling means 320. Furthermore, the configuration for watering is not limited to the configuration using a plurality of water spray pipes 321, and may be configured to spray water like a so-called sprinkler.

When purifying the waste water 10, the control device performs the open / close state of each valve, the flow rate adjustment from the raw water pipe 110, and the like, for example, the activated carbon layer 360 is immersed in the water surface of the waste water 10 that has always flowed. The flow rate may be controlled. With this configuration, the wastewater 10 flowing into the activated carbon from the beginning of the treatment is prevented from colliding, and the formation of an agglomerated layer in the initial stage provides a more advanced purification treatment.
Further, the flow rate may be adjusted based on the dioxin concentration of the inflowing waste water 10 or the content of particulate matter. Thus, a stable purification process can be obtained.

Next, the present invention will be described in more detail with reference to Examples and Reference Examples.
In addition, this invention is not restrict | limited at all to description content, such as these Examples.

[Examples 1 and 2 and Reference Example 1]
The waste water treatment apparatus 300 was configured with only one tank, and purification treatment of the waste water 10 discharged from the smoke washing apparatus of the incinerator was performed to compare and examine the treatment status.
Below, the comparative examination of the processing status is demonstrated.

(Processing conditions)
As the wastewater treatment apparatus 300, activated carbon having different particle diameters was used under the conditions shown in Table 1. That is, Example 1 has an average particle diameter of 1.5 mm, Example 2 has a combination of a small diameter layer having an average particle diameter of 0.8 mm and a large diameter layer having an average particle diameter of 1.5 mm, and Reference Example 1 The thing with an average particle diameter of 1.5 mm was used. The filling amount was unified at 12.5 m ³ .
Further, the waste water 10 having the properties shown in Table 1 was used and was allowed to flow under the conditions shown in Table 1. And the density | concentration of the dioxins in the treated water after a process, the quantity of suspended solids (SS: suspended solid), and turbidity were measured. In addition, the density | concentration of dioxins measured based on JISK0312 and the brand name made from JEOL uses JMS-700. The suspended substance was measured using a filtration mass with a glass fiber filter having a pore diameter of 1 μm in accordance with JIS K 0120. Turbidity was measured using an inspection apparatus having a trade name of 2100P manufactured by HACH, in accordance with JIS K 0400-9-10. The results are shown in Table 1.

(result)

From the results shown in Table 1, the removal rate of dioxin far exceeds the effect predicted by the linear equation with respect to the change in contact time. That is, the contact time of Example 2 is 5 times that of Reference Example 1. In the contact time of Reference Example 1, the dioxin at the outlet is about ½ of the inlet. If the contact time is 5 times, 1/2 ⁵ , that is, 1/64 is the primary prediction, but it can be reduced to 1/1000. Moreover, in Example 1, it has fallen to 1 / 1500,000 with respect to prediction of 1/256.

  In the present invention, for example, various wastewaters containing dioxins and particulate matter such as wastewater generated by smoke washing treatment in an incinerator are purified using activated carbon.

It is a block diagram which shows schematic structure of the waste water treatment system in this invention. It is sectional drawing which shows schematic structure of the waste water treatment equipment which comprises the waste water treatment system in the said embodiment. It is a conceptual diagram which shows roughly the structure of the activated carbon layer of the waste water treatment apparatus in the said embodiment. It is explanatory drawing which shows the discharge condition of the activated carbon in the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Waste water 100 ... Waste water treatment system 300 ... Waste water treatment apparatus 310 ... Treatment tank 311 ... Opening surface 313 ... Discharge port 320 ... Sprinkling means as inflow means 350 ... Accommodating sheet 360 ... Activated carbon layer used as large diameter layer or small diameter layer

Claims (17)

A treatment tank capable of storing waste water containing dioxins and particulate matter by opening an opening surface upward;
Inflow means for flowing the waste water into the treatment tank;
A discharge port for discharging waste water provided and stored in the treatment tank;
In this treatment tank, water permeability is provided in a plurality of layers in the flow direction of the waste water flowing from the inflow means and flowing to the discharge port so as to be able to be carried out from the opening surface to the outside of the treatment tank. A storage sheet;
Activated carbon filled between these containing sheets and constituting a plurality of laminated activated carbon layers in the flow direction of the waste water,
A wastewater treatment apparatus characterized by comprising: A wastewater treatment apparatus according to claim 1,
The inflow means and the discharge port are disposed in a state in which the flow direction of the drainage is substantially along the vertical direction,
The waste water treatment apparatus characterized in that the storage sheet is provided such that one edge is fixed to the treatment tank and the other edge side can be turned back to the outside from the opening surface of the treatment tank. A treatment tank capable of storing waste water containing dioxins and particulate matter by opening an opening surface upward;
Inflow means for flowing the waste water into the treatment tank;
A discharge port for discharging wastewater provided and stored in the treatment tank;
A container having water permeability arranged in parallel in the flow direction of the waste water flowing from the inflow means and flowing to the discharge port so as to be able to be carried out of the opening surface from the opening surface into the treatment tank; ,
Activated carbon that is exchangeably filled in these storage containers and constitutes a plurality of stacked activated carbon layers in the flow direction of the waste water,
A wastewater treatment apparatus characterized by comprising: A wastewater treatment apparatus according to claim 3,
The inflow means and the discharge port are arranged in a state where the flow direction of the drainage is substantially along the horizontal direction,
The waste container is characterized in that the container is suspended and supported from the opening surface to the outside of the tank so as to be able to be carried out. The waste water treatment apparatus according to claim 3 or 4,
The waste container is characterized in that the container is formed into a bag shape with a water-permeable sheet. A wastewater treatment apparatus according to any one of claims 1, 2, and 5,
The water permeable sheet is a net-like material made of linen or synthetic resin. A wastewater treatment apparatus according to any one of claims 1 to 6,
The activated carbon layer is composed of activated carbon having a particle size distribution that forms a coalesced layer of the particulate matter through which the particulate matter in the waste water is filtered to allow the waste water to pass therethrough. apparatus. A wastewater treatment apparatus according to any one of claims 1 to 7,
Each said activated carbon layer was comprised with the activated carbon from which average particle diameter differs, respectively. The waste water treatment equipment characterized by the above-mentioned. A wastewater treatment apparatus according to any one of claims 1 to 8,
Any one of the activated carbon layers is a large-diameter layer composed of activated carbon mainly having a particle size of 1 mm to 5 mm,
Any other one of the activated carbon layers is a small-diameter layer composed of activated carbon mainly having a particle diameter of 0.1 mm or more and 3 mm or less. The waste water treatment apparatus according to claim 9,
Each activated carbon layer is configured such that the large-diameter layer and the small-diameter layer are alternately laminated. A wastewater treatment apparatus according to any one of claims 1 to 10,
A liquid level position detecting means disposed in the processing tank for detecting a liquid level position in the processing tank;
When the liquid level position detecting means detects that the liquid level of the waste water that has flowed into the processing tank has reached a predetermined liquid level position, it has a notifying means for notifying that effect. Wastewater treatment equipment. A wastewater treatment apparatus according to any one of claims 1 to 11,
The activated carbon layer is configured to be laminated in a substantially vertical direction,
The inflow means causes the wastewater to flow into the treatment tank by watering. A wastewater treatment apparatus according to any one of claims 1 to 12,
The activated carbon layer is configured to be laminated in a substantially vertical direction,
The inflow amount of the waste water from the inflow means and the discharge amount of the waste water from the discharge port are adjusted so that the liquid level of the waste water stored in the treatment tank is located above the activated carbon layer. A wastewater treatment apparatus characterized by comprising a flow rate adjusting means. A wastewater treatment system according to any one of claims 1 to 13, wherein a plurality of wastewater treatment apparatuses are connected in parallel so that the inflow means communicate with each other and the discharge ports communicate with each other. A wastewater treatment system, wherein a plurality of the wastewater treatment apparatuses according to any one of claims 1 to 13 are connected in series such that the inflow means and the discharge port communicate with each other. A wastewater treatment method for purifying wastewater containing dioxins and particulates,
A treatment in which activated carbon is filled between a plurality of laminated storage sheets arranged in a laminated form and a plurality of laminated activated carbon layers are passed through the waste water and the particulate matter is filtered through the activated carbon layer. Process,
When the flow resistance through which the wastewater flows through the activated carbon layer is increased by this treatment step, the activated carbon constituting the activated carbon layer located on the upstream side in the flow direction of the wastewater is scraped off by the containing sheet. A discharge process to discharge to
A wastewater treatment method characterized by performing an incineration treatment step of incinerating the activated carbon discharged in the discharge step. A wastewater treatment method for purifying wastewater containing dioxins and particulates,
The activated carbon layer is made up of the particulate matter by passing the waste water through a plurality of activated carbon layers that are water permeable and filled with activated carbon inside to form a layer of activated carbon. Processing steps to filter;
When the flow resistance through which the waste water flows through the activated carbon layer is increased by this treatment step, the activated carbon filled by unloading the storage container constituting the activated carbon layer located upstream in the flow direction of the waste water is filled. A discharge process for discharging
An incineration treatment step of incinerating the activated carbon discharged in the discharge step.

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