CN107814467B - A simple rural domestic sewage wetland treatment system - Google Patents

Abstract

A simple rural domestic sewage wetland treatment system comprises rural domestic sewage householder, conventional septic tanks correspondingly connected with each rural domestic sewage householder through sewage pipes and water outlet pipes converging each conventional septic tank, wherein the water outlet pipes are connected with an integrated purifying tank, and the integrated purifying tank is discharged into an artificial wetland through a pipeline. Realizing multi-section biochemical treatment effect; the higher concentration of the activated sludge is kept; the purifying tank is not blocked; the collection and summarization of household sewage in all the places are realized, and the household sewage is treated together; the sewage treatment achieves the effect of total nitrogen and total phosphorus first-grade A; the nitrification and denitrification are synchronously realized by utilizing the aerobic activated sludge particles, and the artificial wetland is utilized, so that the wastewater is not required to be manually reprocessed.

Description

A simple rural domestic sewage wetland treatment system

Technical field

The invention belongs to the technical fields of sewage treatment and environmental protection, especially the process improvement and upgrading of the combined application of conventional septic tanks, improved airlift septic tanks and integrated purification tanks in rural sewage treatment.

Background technique

Now, as rural life pollution becomes increasingly serious, rural sewage treatment is urgent. Among them, conventionally designed septic tanks can generally be divided into two-compartment septic tanks or three-compartment septic tanks. Conventional septic tanks have many disadvantages. When new rural areas use conventional septic tanks for sewage treatment, when the pipes age and become clogged, activated sludge will It will not be able to supply crops. When the pipelines are connected, the conventional two-compartment septic tank or three-compartment septic tank does not have the effect of removing nitrogen and phosphorus, but is discharged directly, thus causing river pollution.

In addition, the traditional septic tank treatment technology is prone to clogging, making it impossible to achieve Grade A results for total nitrogen and total phosphorus. This also brings many difficulties to environmental pollution control in China's new rural areas.

Contents of the invention

In view of the shortcomings of the existing technology, the present invention provides a method to achieve multi-stage biochemical treatment effects; maintain a high concentration of activated sludge; the purification tank is not clogged; and realizes the collection and collection of scattered household sewage for common treatment; the sewage treatment reaches the total nitrogen level. The effect of total phosphorus level A; a simple rural domestic sewage wetland treatment system that uses aerobic activated sludge particles to simultaneously achieve nitrification and denitrification, and uses artificial wetlands to eliminate the need for manual reprocessing of drainage water.

In order to achieve the purpose of the present invention, the following technical solution is provided: a simple rural domestic sewage wetland treatment system, including a rural domestic sewage household head, a conventional septic tank correspondingly connected to each rural domestic sewage household head through a sewage pipe, and each conventional septic tank. The outlet pipe of the septic tank confluence is characterized in that the outlet pipe is connected to the integrated purification tank, and the integrated purification tank is discharged into the artificial wetland through the pipeline. The integrated purification tank includes a horizontal shell and is opened on the left side of the horizontal shell near the top. The inlet, the discharge port near the top of the right side of the horizontal casing, and the main partition installed in the horizontal casing divide the horizontal casing into two chambers from left to right, the left chamber It is an anaerobic zone, and the right chamber is an aerobic zone. It is characterized in that the left chamber includes a solid-liquid separation tank located near the top, and the remaining space constitutes a sludge storage tank. The solid-liquid separation tank includes a tank with an open top, The No. 1 overflow port is provided near the top of the tank body, and the mud outlet is provided near the bottom end of the tank body. The tank body is provided with a first partition and a second partition plate to separate the tank body from left to right into a solid-liquid separation zone. zone, the second solid-liquid separation zone and the third solid-liquid separation zone. The first and second partitions are provided with No. 2 overflow ports and No. 3 overflow ports to connect adjacent areas. The inflow ports are connected to the first fixed separation zone; The right chamber is divided into three upper, middle and lower chambers by the third and fourth partitions, which are respectively the carrier flow chamber, the slow carrier flow chamber and the sedimentation tank. The right chamber is equipped with a disinfection tank near the discharge port. The tank body is provided with a water inlet connected to the top of the sedimentation tank, and a discharge port connected to the disinfection tank. The third partition is provided with a No. 4 overflow port near the top to connect the carrier flow chamber and the slow carrier flow chamber. The fourth partition is The bottom end and the horizontal shell are spaced apart to form a water passage between the slow-carrying body flow chamber and the sedimentation tank; a water outlet is set near the top of the three solid-liquid separation zones to connect the carrier flow chamber, and between the carrier flow chamber and the sludge storage tank A quantitative airlift water inlet device is provided, an adjustable airlift reflux device is provided between the denitrification device and the slow-carrier flow chamber, and both the carrier flow chamber and the slow-carrier flow chamber are equipped with aerobic aeration devices.

Preferably, a denitrification device is provided in the first area of solid-liquid separation, including an inlet tank placed in the first area of solid-liquid separation, a stuffing pipe connected to the inlet tank, and an outlet pipe connected to the end of the stuffing tube. The stuffing tube is separated from the solid-liquid separation zone. The first area extends into the sludge storage tank near the bottom. The outlet pipe and the filler pipe are set vertically. There are multiple outlets evenly provided on the wall of the outlet pipe, and filler is provided in the filler pipe.

Preferably, an adjustable mixed liquid gas stripping and reflux device is provided between the denitrification device and the buffer body flow chamber. The adjustable mixed liquid gas stripping and reflux device includes a flow control valve and a mixed liquid gas stripping device extending into the near bottom end of the buffer body flow chamber. The main pipe is a return pipe connected to the mixed liquid gas stripping main pipe. The return pipe is connected to the inlet water tank of the denitrification device. An observation port is provided on the upper wall of the return pipe.

Preferably, the sterilization tank includes a sealed housing and a sterilizing tablet quantitative dosing device installed in the sealed housing.

Beneficial effects of the present invention: In the present invention, each household has a dedicated conventional septic tank, which is connected to the corresponding household through pipelines, and each conventional septic tank is independent of each other. This invention connects the treated sludge from each conventional septic tank to an improved airlift septic tank through a circular or rectangular pipe, and finally connects it to an integrated purification tank, where it is processed uniformly in the purification tank. Conventional septic tanks, improved airlift septic tanks, and integrated purification tanks are organically combined to overcome the shortcomings of the existing process and achieve multi-stage biochemical treatment effects; maintaining a high activated sludge concentration; The Johkasou is non-clogging; it realizes the collection and collection of scattered household sewage for joint treatment; the treatment capacity has reached the level A of total nitrogen and total phosphorus; it uses aerobic activated sludge particles to simultaneously achieve nitrification and denitrification; the integrated Johkasou Sharing a fan with the improved gas lift septic tank saves energy consumption and reduces costs. It also uses artificial wetlands to process drainage water by itself, which not only increases the landscape, but also solves the problem of sewage discharge.

Description of the drawings

Figure 1 is a schematic diagram of the system of the present invention.

Figure 2 is a front view of the johkasou in Figure 1.

FIG. 3 is a top view of FIG. 2 .

FIG. 4 is a cross-sectional view along line A-A of FIG. 3 .

Figure 5 is a schematic structural diagram of the denitrification device in Figure 2.

Figure 6 is a top view of the denitrification device of Figure 5.

Figure 7 is a schematic diagram of the connection structure between the blower, air lifting device and aeration zone in Figure 2.

Implementation

Embodiment 1: A simple rural domestic sewage wetland treatment system, including a rural domestic sewage household head 1, a conventional septic tank 2 correspondingly connected to each rural domestic sewage household head 1 through a sewage pipe, and a confluence of each conventional septic tank 2 The water outlet pipe is connected to the integrated purification tank 3, and the integrated purification tank 3 is discharged into the artificial wetland 4 through the pipeline.

The integrated johkasou 3 includes a horizontal shell 3.1, an inlet 3.1.1 opened on the left side of the horizontal shell 3.1 near the top, and a discharge port 3.1.2 opened on the right side of the horizontal shell 3.1 near the top. The main partition 3.2 in the horizontal shell 3.1 divides the horizontal shell 3.1 into two chambers from left to right. The left chamber 3.3 is an anaerobic zone, and the right chamber 3.4 is an aerobic zone. , the left chamber 3.3 includes a solid-liquid separation tank 3.5 located near the top, and the remaining space constitutes a sludge storage tank 3.6. The solid-liquid separation tank 3.5 includes a tank body 3.5.1 with an open top, and a tank body 3.5.1 arranged at the top. The No. 1 overflow port 3.5.2 near the top is opened at the mud outlet 3.5.3 near the bottom of the tank 3.5.1. The tank 3.5.1 is provided with a first partition 3.3.1 and a second partition 3.3. .2 Divide the tank 3.5.1 from left to right into the first solid-liquid separation area 3.7, the second solid-liquid separation area 3.8, and the third solid-liquid separation area 3.9. The first and second partitions (3.3.1, 3.3.2) There are No. 2 overflow port 3.3.1.1 and No. 3 overflow port 3.3.2.1 to connect adjacent areas. The inflow port 3.1.1 is connected to the fixed separation zone 3.7; the right chamber 3.4 passes through the third overflow port 3.3.2.1. , four partitions (3.4.1, 3.4.2) are divided into three upper, middle and lower chambers, namely the carrier flow chamber 3.10, the slow carrier flow chamber 3.11, the sedimentation tank 3.12, the right chamber 3.4 near the discharge port 3.1.2 A disinfection tank 3.13 is provided at the disinfection tank 3.13. A water inlet 3.13.3 is provided on the tank body of the disinfection tank 3.13 and is connected to the top of the sedimentation tank 3.12 (that is, a water inlet is provided on the common wall of the disinfection tank and the sedimentation tank). The discharge port 3.1.2 is connected to the disinfection tank 3.13. The tank 3.13 is connected, and the third partition 3.4.1 is provided near the top with a No. 4 overflow port 3.4.1.1 that connects the carrier flow chamber 3.10 and the buffer carrier flow chamber 3.11. The bottom end of the fourth partition 3.4.2 is connected to the horizontal shell. The bodies 3.1 are arranged at intervals to form a water passage 3.14 between the slow-carrying body flow chamber 3.11 and the sedimentation tank 3.12; the third solid-liquid separation zone 3.9 is provided with an outlet 3.9.1 near the top connected to the carrier body flow chamber 3.10 (i.e., the common main partition of the two There is a water outlet 3.9.1) on 3.2, and a quantitative airlift water inlet device 3.15 is provided between the carrier flow chamber 3.10 and the sludge storage tank 3.6. The quantitative airlift water inlet device 3.15 includes a flow control valve 3.15.1, an extension Enter the mixed liquid gas lift water inlet main pipe 3.15.2 near the bottom of the sludge storage tank 3.6, and the mixed liquid gas lift water inlet pipe 3.15.2 is connected to the outlet pipe 3.15.3. The outlet pipe 3.15.3 is connected to the carrier flow chamber 3.10 .

A denitrification device 3.16 is provided in the first solid-liquid separation area 3.7, including an inlet tank 3.16.1 placed in the first solid-liquid separation area 3.7, a filling pipe 3.16.2 connected to the inlet tank 3.16.1, and a filling pipe 3.16.2 The end-connected outlet pipe 3.16.3 and the packing pipe 3.16.2 pass through the solid-liquid separation area 3.7 and extend into the sludge storage tank 3.6 near the bottom. The outlet pipe 3.16.3 and the packing pipe 3.16.2 are set vertically. A plurality of water outlets 3.16.4 are evenly provided on the wall of the water pipe 3.16.3, and a filler 3.16.5 is provided in the filler pipe 3.16.2.

An adjustable mixed liquid gas lift and reflux device 3.17 is provided between the denitrification device 3.16 and the buffer body flow chamber 3.11. The adjustable mixed liquid gas lift and reflux device 3.17 includes a flow control valve 3.17.1 and extends into the buffer body flow chamber 3.11 near the bottom. The mixed liquid gas stripping main pipe 3.17.2 at the end, the return pipe 3.17.3 connected to the mixed liquid gas stripping main pipe 3.17.2, the return pipe 3.17.3 is connected to the denitrification device inlet water tank 3.16.1, the upper pipe of the return pipe 3.17.3 There is an observation opening in the wall.

The mixed liquid gas lifting main pipes (3.15.2, 3.17.2) of the quantitative gas lifting water inlet device 3.15 and the adjustable mixed liquid gas lifting reflux device 3.17 are equipped with pipelines connected to the fans 3.18.

The bottoms of the carrier flow chamber 3.10 and the slow carrier flow chamber 3.11 are both equipped with aerobic aeration devices, and the aeration volume of the two aerobic aeration devices is controlled by a two-way control valve. The aeration pipe 3.19 of the aerobic aeration device is connected to the fan.

The sterilization tank 3.13 includes a sealed housing 3.13.1 and a sterilizing tablet quantitative dosing device 3.13.2 installed in the sealed housing 3.13.1.

In the above embodiment 1, the material of the main partition 3.2 of the integrated purification tank 3 can be fiberglass. The material of the fourth partition 3.4.2 can be fiberglass. The third partition 3.4.1 between the slow support body flow chamber 3.11 and the support body flow chamber 3.10 can be integrally injection molded. Carriers are provided in the slow-carrier flow chamber 3.11 and the carrier flow chamber 3.10, and the number of carriers in the slow-carrier flow chamber 3.11 is greater than the number of carriers in the carrier flow chamber 3.10. The horizontal shell 3.1 of the integrated purification tank 3 can be integrated injection molded. Observation manholes can be provided on the left and right sides of the top of the horizontal shell 3.1.

A constructed wetland is a surface similar to a swamp that is artificially constructed and controlled to operate. Sewage and sludge are controlled and distributed to the artificially constructed wetland. During the flow of sewage and sludge in a certain direction, they are mainly used It is a technology for treating sewage and sludge based on the triple synergy of physics, chemistry and biology of soil, artificial media, plants and microorganisms. Its mechanism of action includes adsorption, retention, filtration, redox, precipitation, microbial decomposition, transformation, plant shading, residue accumulation, transpiration of water and nutrient absorption, and the effects of various animals. Constructed wetland is a comprehensive ecosystem.

Claims (3)

1. A simple rural domestic sewage wetland treatment system, including a rural domestic sewage household head, a conventional septic tank connected to each rural domestic sewage household head through a sewage pipe, and an outlet pipe that merges each conventional septic tank. Its characteristics The outlet pipe is connected to the integrated purification tank. The integrated purification tank is discharged into the artificial wetland through the pipeline. The integrated purification tank includes a horizontal shell, an inlet opened on the left side of the horizontal shell near the top, and an inlet opened on the left side of the horizontal shell. The discharge port near the top on the right side and the main partition installed in the horizontal shell divide the horizontal shell into two chambers from left to right. The left chamber is the anaerobic zone and the right chamber is the best. The oxygen zone is characterized in that the left chamber includes a solid-liquid separation tank located near the top, and the remaining space constitutes a sludge storage tank. The solid-liquid separation tank includes a tank body with an open top and a No. 1 overflow tank located near the top of the tank body. The flow port and the mud outlet are located near the bottom of the tank. The tank is provided with a first partition and a second partition to divide the tank from left to right into a solid-liquid separation zone, a solid-liquid separation zone two, and a solid-liquid separation zone. To separate the three zones, the first and second partitions are provided with the No. 2 overflow port and the No. 3 overflow port to connect the adjacent areas. The inflow port is connected to the fixed separation zone 1; the right chamber has the third and fourth overflow ports connected to the first and second partitions. The partition is divided into three chambers: the upper, middle and lower chambers, which are the carrier flow chamber, the slow carrier flow chamber and the sedimentation tank. The right chamber is equipped with a disinfection tank near the discharge port, and the body of the disinfection tank is equipped with a water inlet and a sedimentation tank. It is connected near the top, and the discharge port is connected with the disinfection tank. The third partition is provided with a No. 4 overflow port near the top that connects the carrier flow chamber and the slow carrier flow chamber. The bottom end of the fourth partition is spaced apart from the horizontal shell. There is a water passage between the slow carrier flow chamber and the sedimentation tank; a water outlet is set near the top of the three solid-liquid separation areas to connect the carrier flow chamber, and a quantitative airlift water inlet device is installed between the carrier flow chamber and the sludge storage tank. An adjustable gas lift reflux device is installed between the nitrification device and the slow-carrier flow chamber. Both the carrier flow chamber and the slow-carrier flow chamber are equipped with aerobic aeration devices. A denitrification device is installed in the solid-liquid separation area, including a solid-liquid separation zone. The inlet tank in the first liquid separation area, the stuffing pipe connected to the inlet tank, and the outlet pipe connected to the end of the stuffing pipe. The stuffing pipe penetrates from the solid-liquid separation area and extends into the near bottom of the sludge storage tank. The outlet pipe is connected to the end of the sludge storage tank. The stuffing pipe is arranged vertically, a plurality of water outlets are evenly provided on the wall of the water outlet pipe, and fillers are arranged in the stuffing pipe. 2. A simple rural domestic sewage wetland treatment system according to claim 1, characterized in that an adjustable mixed liquid gas lift and reflux device is provided between the denitrification device and the buffer body flow chamber, and the mixed liquid gas lift and reflux can be adjusted The device includes a flow control valve, a mixed liquid gas stripping main pipe extending into the flow chamber near the bottom of the buffer body, and a return pipe connected to the mixed liquid gas stripping main pipe. The return pipe is connected to the denitrification device inlet water tank, and an observation hole is provided on the upper wall of the return pipe. mouth. 3. A simple rural domestic sewage wetland treatment system according to claim 1, characterized in that the disinfection tank includes a sealed housing and a quantitative dosing device for disinfecting tablets installed in the sealed housing.