KR20240159139A - Non-submerged type membrane module and membrane bio-reactor including the same - Google Patents

Abstract

A non-submerged membrane module and a membrane bioreactor including the same are disclosed. According to one aspect of the present invention, there is provided an inlet section including a first pipe section and an inlet pipe formed at a closed end of the first pipe section and introducing raw water; a second pipe section having an open end joined to an open end of the first pipe section, a partition wall joined to an inner surface of one end of the second pipe section and forming an inlet chamber between the closed end of the first pipe section and the first pipe section but forming a treated water discharge chamber between the closed end of the first pipe section and the open end of the second pipe section, a plurality of distribution pipes connected to a plurality of first inlet holes formed in the partition wall and discharging raw water in the inlet chamber, and a treated water discharge pipe formed at an outer surface of the second pipe section and discharging treated water in the treated water discharge chamber; A non-submerged membrane module may be provided, including: a third pipe part having an open end coupled to the open end of the second pipe part; a fixing part having a plurality of second inlet holes coupled to an inner surface of one end of the third pipe part to form a filtration chamber between the third pipe part and the open end thereof and having a plurality of pores connected to the treated water discharge chamber; and a filtration part including a plurality of hollow fiber membranes which are arranged in the filtration chamber and are fixed to the fixing part so that the open ends are connected to the plurality of pores and the other ends are closed; and a fourth pipe part having an open end coupled to the open end of the third pipe part, and a raw water discharge part including a raw water discharge pipe formed at the closed end of the fourth pipe part to discharge raw water that does not pass through the plurality of hollow fiber membranes.

Description

{NON-SUBMERGED TYPE MEMBRANE MODULE AND MEMBRANE BIO-REACTOR INCLUDING THE SAME}

The present invention relates to a non-submerged membrane module and a membrane bioreactor including the same.

The MBR (Membrane Bio-Reactor) method, which combines a biological treatment process and a membrane, is widely used to improve the water quality of effluent from wastewater or sewage treatment plants. This is because the MBR method has various advantages compared to the existing activated sludge method.

First, since there is no need for a sedimentation tank, the installation site can be reduced, and there is no need to worry about sludge swelling or other phenomena that occur in the sedimentation tank, so stable operation is possible.

In addition, perfect solid-liquid separation is possible by the separation membrane, and high MLSS concentration can be maintained in the reactor, so the treatment efficiency is excellent, and the sludge retention time (SRT) increases, so there is also the effect of reducing the amount of excess sludge generated. Considering that the cost of excess sludge treatment accounts for a large proportion of the total water treatment cost, this is very significant.

Meanwhile, the membrane modules used in the MBR method can be broadly divided into submerged and pressurized types.

First, the immersed membrane module, a representative example of which is a hollow fiber module, is immersed inside a biological reactor, such as an aerobic tank or a membrane tank, and collects the treated water that has permeated from the outside to the inside of the membrane by suction. It has the advantages of being installed inside a biological reactor, making the system configuration relatively simple, and having relatively low operating pressure and cost. However, it has the disadvantages of requiring a lot of cost for membrane maintenance and being difficult to apply to a sludge circulation line.

In particular, with regard to membrane maintenance, there are problems such as the need to lift heavy membrane frames, such as those weighing several tons, during chemical recovery cleaning (CIP, Cleaning In Place), the high cost of cleaning chemicals, and the need to install a separate membrane tank to prevent membrane damage and for efficient maintenance, which requires additional energy to supply air for membrane contamination reduction.

Next, a pressurized membrane module is a representative example of a multi-bore module, which is installed outside a bioreactor and circulates the raw water of the bioreactor to collect the treated water that has permeated from the inside to the outside of the membrane by pressurization. This has the advantage of easy membrane maintenance and applicability to a sludge circulation line, but has the disadvantages of relatively high operating pressure and high cost, and a small membrane surface area per unit volume compared to a submerged membrane module.

Meanwhile, after the membrane undergoes a filtration process for a certain period of time, for example, several minutes to several tens of minutes, backwashing is performed with treated water for, for example, several seconds to several minutes, and when the filtration pressure continues to increase and reaches a certain pressure after the backwashing, chemical enhanced backwashing (CEB) is performed, and when the filtration pressure continues to increase even after the chemical injection backwashing, chemical recovery cleaning (CIP, Cleaning In Place) is performed. In particular, chemical recovery cleaning is different in that, in the case of a submerged membrane module, the membrane frame must be lifted and moved to a separate cleaning tank filled with a cleaning agent, whereas in the case of a pressurized membrane module, the cleaning agent is filled inside the housing of the membrane module and cleaned by circulating or leaving it standing for a long period of time.

Republic of Korea Patent Publication No. 10-2015-0088496 (2015.08.03, MBR process sludge activity maintenance method) Korean Patent Publication No. 10-1405009 (June 10, 2014, Sludge reduction type sewage treatment device using a separation membrane and sewage treatment method using the same)

An embodiment of the present invention provides a non-submerged membrane module and a membrane bioreactor including the same, which is configured to be installed in the form of a pressurized membrane module that is convenient for membrane maintenance and applicable to a sludge circulation line, while improving the shortcomings of existing pressurized membrane modules.

According to one aspect of the present invention, there is provided an inlet section including a first pipe section, and an inlet pipe formed at a closed end of the first pipe section and introducing raw water; a second pipe section having an open end joined to an open end of the first pipe section, a partition wall joined to an inner surface of one end of the second pipe section and forming an inlet chamber between the closed end of the first pipe section and the open end of the first pipe section, but forming a treated water discharge chamber between the closed end of the first pipe section and the open end of the second pipe section, a plurality of distribution pipes connected to a plurality of first inlet holes formed in the partition wall and discharging raw water in the inlet chamber, and a treated water discharge pipe formed on an outer surface of the second pipe section and discharging treated water in the treated water discharge chamber; A non-submerged membrane module may be provided, including: a third pipe part having an open end coupled to the open end of the second pipe part; a fixing part having a plurality of second inlet holes coupled to an inner surface of one end of the third pipe part to form a filtration chamber between the third pipe part and the open end thereof and having a plurality of pores connected to the treated water discharge chamber; and a filtration part including a plurality of hollow fiber membranes which are arranged in the filtration chamber and are fixed to the fixing part so that the open ends are connected to the plurality of pores and the other ends are closed; and a fourth pipe part having an open end coupled to the open end of the third pipe part, and a raw water discharge part including a raw water discharge pipe formed at the closed end of the fourth pipe part to discharge raw water that does not pass through the plurality of hollow fiber membranes.

The above plurality of distribution pipes can extend across the treatment water discharge chamber.

The first pipe section, the second pipe section, the third pipe section, and the fourth pipe section can each be arranged to extend in a horizontal direction.

The above plurality of hollow fiber membranes may be configured with closed ends and free ends.

The above inlet portion, the treated water discharge portion, the filter portion, and the raw water discharge portion can be detachably connected to each other by a flange joint.

An outward flange may be formed on each of the outer surface of the other end of the first pipe section, one end outer surface and the other end outer surface of the second pipe section, one end outer surface and the other end outer surface of the third pipe section, and one end outer surface of the fourth pipe section.

The outward flange formed on the outer surface of the other end of the third pipe section and the outward flange formed on the outer surface of one end of the second pipe section can be configured to be flange-joined to each other so that a plurality of the treated water discharge sections and the filter sections can be alternately arranged between the inlet section and the raw water discharge section.

According to another aspect of the present invention, a membrane bioreactor may be provided, comprising: a bioreactor including at least one reaction tank among an anaerobic tank, an anoxic tank, and an aerobic tank; a non-submerged membrane module according to one aspect of the present invention; a raw water transport pipe for transporting raw water of the bioreactor to an inlet pipe of the non-submerged membrane module; a pressurized pump installed in the raw water transport pipe; a treatment tank; a treated water transport pipe for transporting treated water discharged through a treated water discharge pipe of the non-submerged membrane module to the treatment tank; a suction pump installed in the treated water transport pipe; and a sludge transport pipe for returning raw water discharged through the raw water discharge pipe of the non-submerged membrane module to the bioreactor.

The above non-submerged membrane module can be arranged to extend in a horizontal direction.

A plurality of non-submerged membrane modules can be connected in series between the above raw water transport pipe and the above sludge transport pipe.

A plurality of non-submerged membrane modules can be connected in parallel between the above raw water transport pipe and the above sludge transport pipe.

The method may further include a backwash pipe for transporting the treated water of the treatment tank to the inlet pipe and the treated water discharge pipe of the non-submerged separation membrane module; and a backwash pump installed in the backwash pipe.

The method may further include a mixer installed in the above-described reverse osmosis pipe; and a cleaning agent supply unit for supplying a cleaning agent to the mixer.

According to an embodiment of the present invention, the present invention is configured to be installed in the form of a pressurized membrane module, so that the membrane can be conveniently maintained and applied to a sludge circulation line, and the shortcomings of existing pressurized membrane modules can be improved.

FIG. 1 is a drawing illustrating a non-immersed membrane module according to one embodiment of the present invention.
Figure 2 is a left side view of Figure 1,
Figure 3 is a right side view of Figure 1,
Figure 4 is a cross-sectional view of Figure 1,
Fig. 5 is a cross-sectional view taken along line I-I of Fig. 4,
Fig. 6 is a cross-sectional view from II-II of Fig. 4,
Figure 7 is a drawing for showing the fluid flow in Figure 4.
Fig. 8 is a modified example of Fig. 4,
FIGS. 9 and 10 are drawings illustrating a membrane bioreactor according to another embodiment of the present invention.
Figure 11 is a drawing showing an example of the membrane modules connected in series in Figures 9 and 10.
Figure 12 is a drawing showing another example in which the membrane modules are connected in series in Figures 9 and 10.
Figure 13 is a drawing showing an example of the membrane modules connected in parallel in Figures 9 and 10.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

The terms used in the embodiments of the present invention, unless explicitly defined otherwise, can be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the art to which the present invention belongs, and are to be viewed only as describing specific embodiments and are not intended to limit the present invention.

In this specification, singular forms will be considered to include plural forms as well, unless otherwise specified.

Additionally, when a part is described as "including" a certain component, it is intended that the part may also include other components.

Also, when a component is described as "on", it means above or below that component, and does not necessarily mean that it is located on the upper side with respect to the direction of gravity.

Additionally, when a component is described as being “connected” or “coupled” to another component, this may include not only cases where the component is directly connected or coupled to the other component, but also cases where the component is indirectly connected or coupled through another component.

In addition, terms such as first, second, etc. may be used to describe certain components, but these terms are only intended to distinguish the components from other components and are not intended to limit the nature, order, or sequence of the components.

FIG. 1 is a drawing illustrating a non-submerged membrane module according to an embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a right side view of FIG. 1, FIG. 4 is a longitudinal cross-sectional view of FIG. 1, FIG. 5 is a cross-sectional view taken along line I-I of FIG. 4, FIG. 6 is a cross-sectional view taken along line II-II of FIG. 4, and FIG. 7 is a drawing for showing fluid flow in FIG. 4.

Referring to FIGS. 1 to 7, a non-submerged membrane module (10) according to one embodiment of the present invention may include an inlet (100), a treated water discharge unit (200), a filtration unit (300), and a raw water discharge unit (400).

The inlet portion (100) may include a first pipe portion (110) and an inlet pipe (120).

The first pipe section (110) may have, for example, a circular pipe shape, and one end of the first pipe section (110) may be closed while the other end of the first pipe section (110) may be open.

An inflow chamber (100a) into which raw water flows can be formed on the inside of the first pipe section (110).

An inlet pipe (120) may be formed at a closed end of the first pipe section (110) to provide a passage through which raw water may flow into the inlet chamber (100a).

A raw water transfer pipe that supplies raw water to the bioreactor can be connected to the inlet pipe (120), and a pressurized pump for raw water transfer can be installed in the raw water transfer pipe.

The treated water discharge unit (200) may include a second pipe unit (210), a bulkhead (220), a plurality of distribution pipes (230), and a treated water discharge pipe (240).

The second pipe section (210) may have, for example, a circular pipe shape, and one end and the other end of the second pipe section (210) may be open.

The open end of the second pipe section (210) can be connected to the open end of the first pipe section (110).

The partition wall (220) may be coupled to the inner surface of one end of the second pipe section (210) to partition the inflow chamber (100a) and the treated water discharge chamber (200a). Specifically, the inflow chamber (100a) may be formed between the closed end of the first pipe section (110) and the partition wall (220), and the treated water discharge chamber (200a) may be formed to extend from the partition wall (220) toward the open end of the second pipe section (210).

Each of the bulkheads (220) may have a plurality of first inlet holes (221) penetrating the bulkhead (220).

A plurality of distribution pipes (230) can be connected to the right side of the partition wall (220) so that the inner space of the distribution pipes (230) is connected to the first inlet hole (221). Accordingly, the raw water of the inlet chamber (100a) can be supplied in an evenly distributed form to the filtration chamber (300a) described later through the plurality of distribution pipes (230).

For example, a plurality of distribution pipes (230) can be extended across the treated water discharge chamber (200a) to realize a compact structure with improved space utilization.

The treated water discharge pipe (240) can be formed on the outer surface of the second pipe section (210) to provide a passage through which the treated water collected in the treated water discharge chamber (200a) can be discharged.

A treated water transport pipe for transporting treated water to a treatment tank may be connected to the treated water discharge pipe (240), and a suction pump for transporting treated water may be installed in the treated water transport pipe.

That is, in the present embodiment, by providing the pressure for allowing the treated water to pass through the plurality of hollow fiber membranes in the filtration chamber (300a) by suction using a suction pump rather than a pressurized method, it is possible to operate at a relatively low operating pressure and cost compared to a conventional pressurized separation membrane module.

The filter unit (300) may include a third pipe unit (310), a fixed unit (320), and a plurality of hollow fiber membranes (330).

The third pipe section (310) may have, for example, a circular pipe shape, and one end and the other end of the third pipe section (310) may be open.

The open end of the third pipe section (310) can be connected to the open end of the second pipe section (210).

The fixed part (320) can be coupled to one end inner surface of the third pipe part (310) to partition the treated water discharge chamber (200a) and the filtration chamber (300a). Specifically, the treated water discharge chamber (200a) can be formed between the partition wall (220) and the fixed part (320), and the filtration chamber (300a) can be formed to extend from the fixed part (320) toward the open other end of the third pipe part (310).

The fixed part (320) may have a plurality of second inlet holes (321) and a plurality of holes (322) penetrating the fixed part (320).

A plurality of distribution pipes (230) can be connected to a plurality of second inlet holes (321). That is, the inner space of the distribution pipe (230) can be connected to the second inlet holes (321).

For example, the distribution pipe (230) can be detachably inserted into the second inlet hole (321).

As a result, the raw water of the inflow chamber (100a) can be supplied in an evenly distributed form into the filtration chamber (300a) through the first inflow hole (221), the distribution pipe (230), and the second inflow hole (321) in sequence.

A plurality of hollow fiber membranes (330) can be fixed to a fixing member (320) and placed within a filtration chamber (300a).

The hollow fiber membrane (330) may have a hollow space formed inside that extends lengthwise, with one end open and the other end closed.

The hollow fiber membrane (330) can be fixed to the fixing member (320) by, for example, using an adhesive resin or the like so that an open end of the hollow fiber membrane (330) is connected to a pore (322) of the fixing member (320).

Accordingly, the inner space of the hollow fiber membrane (330) can be connected to the treated water discharge chamber (200a) through the pores (322), and the treated water that passes through the hollow fiber membrane (330) in the filtration chamber (300a) and flows into the inner space of the hollow fiber membrane (330) can be collected into the treated water discharge chamber (200a) through the pores (322).

That is, in the present embodiment, by using a hollow fiber membrane-shaped separation membrane, the disadvantage of a small separation membrane surface area per unit volume compared to a conventional pressurized separation membrane module can be improved.

Additionally, the closed end of the hollow fiber membrane (330) may be configured as a free end that is not fixed to anything.

Accordingly, a high-velocity fluid flow can be formed on the surface of the hollow fiber membrane (330) according to the raw water flow within the filtration chamber (300a), and a plurality of hollow fiber membranes (330) can flow while being bent and deformed according to the fluid flow within the filtration chamber (300a), and as a result, in the case of a general hollow fiber module, air must be injected periodically to prevent contaminants from accumulating on the surface of the hollow fiber membrane, whereas in the present embodiment, periodic air injection and installation of a blower for this purpose are not required, and thus an energy saving effect can be achieved.

The raw water discharge unit (400) may include a fourth pipe unit (410) and a raw water discharge pipe (420).

The fourth pipe section (410) may have, for example, a circular pipe shape, and one end of the fourth pipe section (410) may be open, while the other end of the fourth pipe section (410) may be closed.

The open end of the fourth pipe section (410) can be connected to the open end of the third pipe section (310).

Accordingly, the filtration chamber (300a) can be formed between the fixed portion (320) and the closed other end of the fourth pipe portion (410).

The raw water discharge pipe (420) may be formed at the closed end of the fourth pipe section (410) to provide a passage through which raw water that has not passed through the plurality of hollow fiber membranes (330) in the filtration chamber (300a) may be discharged.

Meanwhile, the inner space of the fourth pipe section (410) may be formed in a funnel shape with the inner diameter decreasing as it gets closer to the raw water discharge pipe (420) so that the raw water can be discharged smoothly to the raw water discharge pipe (420).

Meanwhile, the membrane module (10) may be installed to extend in a horizontal direction. That is, the first pipe section (110), the second pipe section (210), the third pipe section (310), and the fourth pipe section (410) may each be arranged to extend in a horizontal direction. As a result, the pump for transporting raw water or treated water can be operated at a low head.

Meanwhile, the inlet (100), the treated water discharge (200), the filter (300), and the raw water discharge (400) can be detachably connected to each other by flange connection.

To this end, an outward flange (F) may be formed on the outer surface of the other end of the first pipe section (110), the outer surface of one end and the outer surface of the other end of the second pipe section (210), the outer surface of one end and the outer surface of the other end of the third pipe section (310), and the outer surface of one end of the fourth pipe section (410).

Specifically, the outward flange (F) formed on the outer surface of the other end of the first pipe section (110) and the outward flange (F) formed on the outer surface of one end of the second pipe section (210) can be configured to be flange-joined to each other, the outward flange (F) formed on the outer surface of the other end of the second pipe section (210) and the outward flange (F) formed on the outer surface of one end of the third pipe section (310) can be configured to be flange-joined to each other, and the outward flange (F) formed on the outer surface of the other end of the third pipe section (310) and the outward flange (F) formed on the outer surface of one end of the fourth pipe section (410) can be configured to be flange-joined to each other.

For example, a pair of outwardly facing flanges (F) can be flanged together by a clamp (C).

In this case, a pair of outwardly facing flanges (F) can be formed with the same shape and size so that they can be flanged to each other.

As another example, a pair of outwardly facing flanges (F) may be flanged to each other by bolts and nuts.

In this case, the pair of outwardly facing flanges (F) may be provided with bolt fastening holes of the same size, number and arrangement so that they can be flanged together.

Meanwhile, the first pipe section (110), the second pipe section (210), the third pipe section (310), and the fourth pipe section (410) may be viewed as having a pipe shape, but are not necessarily limited thereto, and in particular, the first pipe section (110) or the fourth pipe section (410) may be in the shape of a lid.

Fig. 8 is a modified example of Fig. 4.

Referring to FIG. 8, the membrane module (10) may be configured in a form in which a plurality of treated water discharge units (200) and filtration units (300) are alternately arranged between the inlet unit (100) and the raw water discharge unit (400).

To this end, the outward flange (F) formed on the outer surface of the other end of the third pipe section (310) and the outward flange (F) formed on the outer surface of one end of the second pipe section (210) can be configured to be flange-joined to each other.

That is, the membrane module (10) can be configured with a structure that facilitates serial connection of the filter unit (300).

For example, in cases where the contamination level of raw water is high or the inflow rate of raw water needs to be increased, the quality of the treated water can be maintained at a constant level by alternately arranging multiple treated water discharge units (200) and filtration units (300) between the inflow unit (100) and the raw water discharge unit (400).

FIGS. 9 and 10 are drawings illustrating a membrane bioreactor according to another embodiment of the present invention.

Referring to FIGS. 9 and 10, a membrane bioreactor (1) according to another embodiment of the present invention may include a membrane module (10), a bioreactor (20), a raw water transport pipe (30), a pressurizing pump (30a), a treatment tank (40), a treated water transport pipe (50), a suction pump (50a), and a sludge transport pipe (60), and may further include a backwash pipe (70), a backwash pump (70a), a mixer (80), and/or a cleaning agent supply unit (90).

The membrane module (10) may be a non-submerged membrane module according to one embodiment of the present invention.

In particular, the non-submerged membrane module (10) may be installed to extend horizontally, thereby allowing the pump for transporting raw water or treated water to operate at a low head.

The biological reactor (20) can perform a biological treatment process and may include at least one reactor among an anaerobic reactor (20a), an anoxic reactor (20b), and an aerobic reactor (20c).

The raw water transport pipe (30) is connected to the inlet pipe (120) of the membrane module (10), thereby transporting the raw water biologically treated in the bioreactor (20) to the inlet pipe (120) of the membrane module (10).

A pressurized pump (30a) is installed in a raw water transport pipe (30) and can generate fluid pressure for raw water transport.

The treatment tank (40) can temporarily store the treated water and then discharge it to the outside, for example, by discharge.

The treated water transport pipe (50) is connected to the treated water discharge pipe (240) of the membrane module (10), thereby transporting the treated water discharged through the treated water discharge pipe (240) of the membrane module (10) to the treatment water tank (40).

A suction pump (50a) is installed in a treatment water transport pipe (50) and can generate fluid pressure for transporting treatment water.

That is, in the present embodiment, the pressure for allowing the treated water to pass through the plurality of hollow fiber membranes (330) in the filtration chamber (300a) is provided by a suction pump (50a) rather than a pressurized method, thereby enabling operation at a relatively low operating pressure and cost compared to a conventional pressurized separation membrane module.

The sludge transfer pipe (60) is connected to the raw water discharge pipe (420) of the membrane module (10), thereby allowing the raw water discharged through the raw water discharge pipe (420) of the membrane module (10) to be returned to the bioreactor (20).

Additionally, the sludge transport pipe (60) can transport the raw water discharged through the raw water discharge pipe (420) of the membrane module (10) to the sludge thickener.

The reverse-washing pipe (70) is connected to the inlet pipe (120) and the treated water discharge pipe (240) of the membrane module (10), thereby transporting the treated water of the treatment tank (40) to the inlet pipe (120) and the treated water discharge pipe (240) of the membrane module (10) to perform the reverse-washing operation.

For example, the backwashing operation can be performed periodically for about 1 minute after normal operation (filtration operation) that takes place for about 14 minutes, and the wastewater that has undergone the backwashing can be discharged to a bioreactor (20) or a sludge thickener through the raw water discharge pipe (420) of the membrane module (10).

A backwash pump (70a) can be installed in a backwash pipe (70) to generate fluid pressure for transporting treated water.

A mixer (80) is installed in a backwash pipe (70) and can mix a cleaning agent into the treated water transported through the backwash pipe (70). For example, the mixer (80) may be a line mixer.

The cleaning agent supply unit (90) can supply cleaning agents for membrane cleaning to the mixer (80).

For example, the cleaning agent may include, but is not limited to, NaOCl/Acid.

Chemical injection backwashing can be performed for about 30 minutes in a cycle of two to three times a week, and chemical recovery washing can be performed for about 2 to 4 hours in a cycle of one to two times a year, and chemical injection backwashing and chemical recovery washing can be performed in the same manner.

For example, when the reverse pump (70a) and the cleaning chemical supply unit (90) are driven, the treated water mixed with the cleaning chemical in the mixer (80) is supplied to the inlet pipe (120) and the treated water discharge pipe (240) of the membrane module (10), thereby performing a chemical injection reverse washing or a chemical recovery washing operation, and the resulting waste water can be discharged to a bioreactor (20) or a sludge thickener through the raw water discharge pipe (420) of the membrane module (10).

That is, since the cleaning operation using the cleaning agent is performed within the housing of the membrane module (10), the amount of cleaning agent used can be drastically reduced compared to a conventional immersion-type membrane module.

Meanwhile, valves (V) are installed in the raw water transport pipe (30), the treated water transport pipe (50), the sludge transport pipe (60), and the backwash pipe (70), so that the various tasks described above can be performed smoothly, and the pipes required for each task can be opened while the pipes that are not required can be closed.

Meanwhile, the pressurizing pump (30a) for introducing raw water from the bioreactor (20) into the membrane module (10) can also provide the fluid pressure required for sludge transport through the sludge transport pipe (60).

Meanwhile, since air injection is not required for membrane maintenance of the membrane module (10), raw water can be circulated or supplied from the aerobic tank (20c) to the membrane module (10) as shown in the drawing, and can also be circulated or supplied from the anaerobic tank (20a) or the anoxic tank (20b).

In addition, the present invention can be applied to various other construction methods and high-liquid separation fields.

In addition, the present invention may be applied to various fields as an MBR method or a solid-liquid separation filtration method across various industries, including floating substances and metal processing, food solid-liquid separation, and pulp and paper manufacturing.

Meanwhile, the separation membrane of the present invention, for example, a hollow fiber membrane, can be manufactured from materials such as olefin, PVDF, PTFE, PVC, etc., and the separation membrane housing, for example, the first pipe section, the second pipe section, the third pipe section, the fourth pipe section, etc., can be manufactured from materials such as FRP, CPVC, ABS, stainless steel, etc.

FIG. 11 is a drawing showing an example of the membrane modules in FIGS. 9 and 10 being connected in series, FIG. 12 is a drawing showing another example of the membrane modules in FIGS. 9 and 10 being connected in series, and FIG. 13 is a drawing showing an example of the membrane modules in FIGS. 9 and 10 being connected in parallel.

Referring to FIGS. 11 and 12, a plurality of separation membrane modules (10) can be connected in series between the raw water transport pipe (30) and the sludge transport pipe (60). As a result, the filtration rate can be improved.

In particular, multiple membrane modules (10) can be interconnected by a curved pipe to increase space utilization as shown in Fig. 12.

Referring to FIG. 13, a plurality of separation membrane modules (10) can be connected in parallel between the raw water transport pipe (30) and the sludge transport pipe (60).

As a result, the processing capacity can be increased, and the filtration operation can be performed without interruption even when washing or replacing some of the plurality of parallel-connected membrane modules (10).

Meanwhile, when connecting the membrane modules (10) in series or in parallel, the inlet (100) and the raw water discharge (400) may be omitted at the connection point of multiple membrane modules (10) as described above.

Although the preferred embodiments of the present invention have been described above, they are merely examples and do not limit the present invention. Those skilled in the art to which the present invention pertains will be able to modify and change the embodiments in various ways by adding, changing, deleting or adding components within the scope that does not depart from the technical idea of the present invention described in the claims, and this will also be considered to be included within the scope of the rights of the present invention.

1: Membrane bioreactor 10: Membrane module
20: Bioreactor 20a: Anaerobic tank
20b: Anaerobic tank 20c: Aerobic tank
30: Raw water transfer pipe 30a: Pressurized pump
40: Treatment tank 50: Treatment water transfer pipe
50a: Suction pump 60: Sludge transfer pipe
70: Backwash pipe 70a: Backwash pump
80: Mixer 90: Cleaning agent supply section
100: Inlet 100a: Inlet chamber
110: 1st pipe section 120: Inlet pipe
200: Treatment water discharge section 200a: Treatment water discharge chamber
210: 2nd pipe section 220: Bulkhead
221: 1st inlet 230: Distribution pipe
240: Treatment water discharge pipe 300: Filtration unit
300a: Filtration chamber 310: Third pipe section
320: Fixed part 321: Second inlet hole
322: 330: Hollow Desert
400: Raw water discharge section 410: 4th pipe section
420: Raw water discharge pipe

Claims (10)

An inlet section including a first pipe section and an inlet pipe formed at a closed end of the first pipe section for introducing raw water;
A treated water discharge unit including a second pipe unit having one open end joined to the open other end of the first pipe unit, a partition wall joined to an inner surface of one end of the second pipe unit to form an inflow chamber between the closed one end of the first pipe unit and the open other end of the second pipe unit, and forming a treated water discharge chamber between the closed one end of the first pipe unit and the open other end of the second pipe unit, a plurality of distribution pipes connected to a plurality of first inflow holes formed in the partition wall to discharge raw water in the inflow chamber, and a treated water discharge pipe formed on an outer surface of the second pipe unit to discharge treated water in the treated water discharge chamber;
A third pipe part having an open end connected to the open end of the second pipe part, a fixing part having a plurality of second inlet holes connected to the inner surface of one end of the third pipe part and forming a filtration chamber between the open end of the third pipe part and the open end of the third pipe part, and a plurality of pores connected to the treated water discharge chamber, and a filtration part including a plurality of hollow fiber membranes arranged in the filtration chamber, the open ends of which are connected to the plurality of pores and the other ends of which are closed; and
A non-submerged separation membrane module comprising: a fourth pipe section having an open end joined to the open end of the third pipe section; and a raw water discharge section including a raw water discharge pipe formed at the closed end of the fourth pipe section and discharging raw water that has not passed through the plurality of hollow fiber membranes.
In the first paragraph,
A non-submerged separation membrane module in which the plurality of distribution pipes extend across the treated water discharge chamber.
In the first paragraph,
A non-submersible separation membrane module in which the first pipe section, the second pipe section, the third pipe section, and the fourth pipe section are each arranged to extend in a horizontal direction.
In the first paragraph,
The above-mentioned plurality of hollow fiber membranes are non-submerged separation membrane modules in which the closed end is configured as a free end.
A biological reactor comprising at least one reactor selected from the group consisting of an anaerobic reactor, an anoxic reactor, and an aerobic reactor;
Non-immersed membrane module according to Article 1;
A raw water transfer pipe that transfers the raw water of the above bioreactor to the inlet pipe of the above non-submerged separation membrane module;
A pressure pump installed in the above raw water transport pipe;
treatment tank;
A treated water transport pipe that transports the treated water discharged through the treated water discharge pipe of the above non-submerged separation membrane module to the above treatment water tank;
A suction pump installed in the above-mentioned treatment water transfer pipe; and
A membrane bioreactor including a sludge transfer pipe that returns raw water discharged through the raw water discharge pipe of the non-submerged membrane module to the bioreactor.
In paragraph 5,
The above non-submerged membrane module is a membrane bioreactor in which the membrane module is arranged to extend in a horizontal direction.
In paragraph 5,
A membrane bioreactor in which a plurality of non-submerged membrane modules are connected in series between the raw water transport pipe and the sludge transport pipe.
In paragraph 5,
A membrane bioreactor in which a plurality of non-submerged membrane modules are connected in parallel between the raw water transport pipe and the sludge transport pipe.
In paragraph 5,
A backwash pipe that transports the treated water of the above treatment tank to the inlet pipe and the treated water discharge pipe of the non-submerged separation membrane module; and
A membrane bioreactor further comprising a backwash pump installed in the above backwash pipe.
In Article 9,
A mixer installed in the above reverse osmosis pipe; and
A membrane bioreactor further comprising a cleaning chemical supply unit for supplying a cleaning chemical to the above mixer.