CN217077329U - Rural domestic sewage treatment system - Google Patents

Abstract

The utility model provides a rural domestic sewage treatment system, which belongs to the field of rural domestic sewage treatment facilities. The system includes a sewage treatment station and a multi-stage biological contact oxidation reactor. The sewage treatment station and the multi-stage biological contact oxidation reactor are buried underground; the sewage treatment station is divided into a grid pool, a regulating pool, a sludge pool, and a grid. The upper part of the pool is provided with a sewage collection pipe, an artificial grid is provided between the grid pool and the regulating pool, a return port is provided between the regulating pool and the sludge pool, and a sewage lifting pump is provided at the bottom of the regulating pool; the multi-stage biological contact oxidation reaction The device includes a front anoxic and anaerobic sedimentation tank, a first aerobic and anoxic sedimentation tank, a second aerobic and anoxic sedimentation tank, and a sedimentation and clarification tank connected in series. The sewage lifting pump lifts the sewage in the regulating tank to the front Anoxic anaerobic sedimentation tank. The utility model is beneficial to reduce the pollution and damage to rivers and environments caused by rural domestic sewage, save energy and protect the environment, and is suitable for popularization and application in rural areas.

Description

A rural domestic sewage treatment system

technical field

The utility model belongs to the field of rural domestic sewage treatment facilities, in particular to a rural domestic sewage treatment system.

Background technique

The sewage generated by rural residents mainly includes the sewage from flushing toilets of farmers and village public toilets, as well as the sewage from washing, bathing and kitchen drainage, as well as the drainage from rural tourist reception households, hotels and restaurants, excluding industrial wastewater from township enterprises, large-scale agricultural and sideline product processing wastewater, The commercial concentrated catering wastewater, livestock and poultry breeding and slaughtering wastewater in tourist areas.

At present, villages and residents in rural areas are scattered, and sewage discharge has the characteristics of wide and scattered discharge. The domestic sewage of rural residents cannot be treated in a large-scale centralized manner. As people pay more and more attention to environmental protection, rural domestic sewage is gradually upgraded from direct discharge to closed septic tank treatment. The sewage is directly discharged after anaerobic fermentation in the septic tank, so that the treated water quality cannot meet the Class A standard of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants". This substandard septic tank drainage gathers into village ditches, fish ponds and lakes, exceeding the carrying capacity of natural water bodies, damaging the water environment, and even threatening the safety of drinking water in rural areas.

SUMMARY OF THE INVENTION

Aiming at the above-mentioned defects or deficiencies in the prior art, the utility model provides a rural domestic sewage treatment system, which conducts secondary centralized treatment of sewage discharged from various septic tanks in rural areas and then discharges it, thereby reducing the impact of rural domestic sewage on the surrounding environment. pollution and damage.

In order to achieve the above purpose, the technical scheme adopted by the present utility model is a rural domestic sewage treatment system, including a sewage treatment station and a multi-stage biological contact oxidation reactor, and the sewage treatment station and the multi-stage biological contact oxidation reactor are all buried underground; The interior of the sewage treatment station is divided into a grid pool, a regulating pool, and a sludge pool. The upper part of the grid pool is provided with a sewage collection pipe, an artificial grid is provided between the grid pool and the regulating pool, and an artificial grid is provided between the regulating pool and the sludge pool. There is a return port, and a sewage lifting pump is arranged at the bottom of the adjustment tank; the multi-stage biological contact oxidation reactor includes a front anoxic and anaerobic sedimentation tank, a first aerobic and anoxic sedimentation tank, a second aerobic and anoxic sedimentation tank, and a second aerobic and anoxic sedimentation tank connected in series. The sedimentation tank, sedimentation and clarification tank, and sewage lifting pump lift the sewage in the adjustment tank to the pre-anoxic and anaerobic sedimentation tank through the pipeline.

Further, the front anoxic anaerobic precipitation tank includes a front outer tank body and a front inner tank body, an interlayer is provided between the front outer tank body and the front inner tank body, and a middle part of the front inner tank body is provided. There is a front three-dimensional spiral biological rope filler, an anaerobic sludge filter layer is arranged in the middle of the interlayer between the front outer tank and the front inner tank, and the sewage lifting pump lifts the sewage in the adjustment tank to the front inner tank through the pipeline The upper part of the body and the upper part of the front outer tank body are provided with a front drain pipe, and the front drain pipe is connected to the first aerobic and anoxic sedimentation tank.

Further, the first aerobic and anoxic precipitation tank includes a first outer tank body and a first inner tank body, an interlayer is provided between the first outer tank body and the first inner tank body, and a middle part of the first inner tank body is provided. There is a first three-dimensional spiral biological rope filler, a first anoxic sludge filter layer is arranged in the middle of the interlayer between the first outer tank and the first inner tank, and the drainage end of the front drain pipe extends into the first inner tank. In the upper part, the upper part of the first outer tank body is provided with a first drainage pipe, and the first drainage pipe is connected with the second aerobic and anoxic sedimentation tank.

Further, the second aerobic and anoxic precipitation tank includes a second outer tank body and a second inner tank body, an interlayer is provided between the second outer tank body and the second inner tank body, and a middle part of the second inner tank body is provided. There is a second three-dimensional spiral biological rope filler, the middle of the interlayer between the second outer tank and the second inner tank is provided with a second anoxic sludge filter layer, and the drain end of the first drain pipe extends into the second inner tank. On the upper part, the upper part of the second outer tank body is provided with a second drain pipe, and the second drain pipe is connected to the sedimentation and clarification tank.

Further, a vertical guide tube is arranged in the central part of the sedimentation and clarification tank, an inclined tube precipitator is arranged in the middle of the interlayer between the inner wall of the sedimentation and clarification tank and the vertical guide tube, and the drain end of the second drain pipe extends into the vertical guide. In the upper part of the flow cylinder, the upper part of the sedimentation and clarification tank is also provided with a third drain pipe.

Further, a sludge pump is provided at the bottom of the sedimentation and clarification tank, and the sludge discharge pipeline of the sludge pump has two branch pipes, one of which is connected to the sludge tank, and the sludge discharge end of the other branch pipe extends into the front inner tank. upper body.

Further, the front anoxic and anaerobic precipitation tank, the first aerobic anoxic precipitation tank, and the second aerobic anoxic precipitation tank are respectively provided with a pre-aeration pipe, a first aeration pipe, a second aeration pipe, and a second aeration pipe. The aeration pipe, the front aeration pipe, the first aeration pipe, and the second aeration pipe are respectively connected with the aerator set on the ground through pipes.

Further, an inspection well is connected to the drain end of the third drain pipe, and a clean water discharge pipe is arranged on the inspection well, and the discharge end of the clean water discharge pipe is placed above the river.

Further, the second drainage pipe is connected with a phosphorus removal and medicine addition box arranged on the ground through a pipeline.

Compared with the prior art, due to the adoption of the above-mentioned technical solutions, the beneficial technical effects of the present utility model are: the rural domestic sewage treatment system of the present utility model collects the domestic sewage from each septic tank and sends it to the grid of the sewage treatment station. The grid pond, after removing the larger suspended floating matter and particulate impurities through the artificial grid, enters the regulating pond to homogenize and equalize the water quality. Biochemical reaction treatment is carried out to degrade the organic matter in the sewage, and then the clarified water is discharged after precipitation; the rural domestic sewage treatment system of the utility model is beneficial to reduce the pollution and damage to the river and the environment caused by the rural domestic sewage, energy saving and environmental protection, suitable for To promote application in rural areas.

Description of drawings

Fig. 1 is the structural representation of the rural domestic sewage treatment system of the present utility model;

Reference numerals: 1-sewage treatment station, 101-grid tank, 102-adjustment tank, 103-sludge tank, 104-sewage collection pipe, 105-artificial grille, 106-return port, 107-sewage lift pump, 2- Front anoxic and anaerobic sedimentation tank, 201- Front outer tank, 202- Front inner tank, 203- Front three-dimensional spiral biological rope packing, 204- Anaerobic sludge filter layer, 205- Front Drain pipe, 3- the first aerobic and anoxic sedimentation tank, 301- the first outer tank, 302- the first inner tank, 303- the first three-dimensional spiral biological rope packing, 304- the first anoxic sludge filter layer , 305- the first drainage pipe, 4- the second aerobic and anoxic sedimentation tank, 401- the second outer tank, 402- the second inner tank, 403- the second three-dimensional spiral biological rope filler, 404- the second lack Oxygen sludge filter layer, 405-second drainage pipe, 5-precipitation and clarification tank, 501-vertical guide tube, 502-inclined tube precipitator, 503-sludge pump, 504-third drainage pipe, 6-front Aeration pipe, 7-first aeration pipe, 8-second aeration pipe, 9-aerator, 10-phosphorus removal and dosing box, 11-inspection well, 1101-purified water discharge pipe.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below through preferred embodiments.

Example

Referring to Figure 1, a rural domestic sewage treatment system in this embodiment includes a sewage treatment station 1 and a multi-stage biological contact oxidation reactor. The sewage treatment station 1 and the multi-stage biological contact oxidation reactor are all buried underground. The interior of the sewage treatment station 1 is divided into a grid pool 101, a regulating pool 102, and a sludge pool 103. The upper part of the grid pool 101 is provided with a sewage collection pipe 104, and an artificial grid is arranged between the grid pool 101 and the regulating pool 102. The grid 105, a return port 106 is provided between the adjustment tank 102 and the sludge tank 103, and a sewage lift pump 107 is arranged at the bottom of the adjustment tank 102; The sedimentation tank 2, the first aerobic and anoxic sedimentation tank 3, the second aerobic and anoxic sedimentation tank 4, the sedimentation and clarification tank 5, the sewage lifting pump 107 lifts the sewage in the conditioning tank 102 to the pre-anoxic and anaerobic precipitation tank through the pipeline in sedimentation tank 2.

In this embodiment, the sewage collection pipe 104 collects the domestic sewage from the septic tank, and the domestic sewage enters the grid tank 101 of the sewage treatment station 1, and the artificial grid 105 removes large suspended floating objects and particulate impurities and then enters the adjustment tank 102. Homogenize and equalize the water quality. A sewage lifting pump 107 is installed in the regulating tank 102 to elevate the sewage to the multi-stage biological contact oxidation reactor.

In this embodiment, the tops of the grid tank 101 , the adjustment tank 102 , and the sludge tank 103 are all provided with cleaning ports, and the upper part of the sludge tank 103 is also provided with an exhaust port.

Specifically, the front anoxic anaerobic sedimentation tank 2 includes a front outer tank body 201 and a front inner tank body 202. An interlayer is provided between the front outer tank body 201 and the front inner tank body 202. The inner middle of the inner tank 202 is provided with a front three-dimensional spiral biological rope filler 203, the middle of the interlayer between the front outer tank 201 and the front inner tank 202 is provided with an anaerobic sludge filter layer 204, and the sewage lifting pump 107 will The sewage in the adjustment tank 102 is lifted to the upper part of the front inner tank 202 through the pipeline. The upper part of the front outer tank 201 is provided with a front drain pipe 205 , and the front drain pipe 205 is connected to the first aerobic and anoxic sedimentation tank 3 . The first aerobic and anoxic precipitation tank 3 includes a first outer tank 301 and a first inner tank 302. An interlayer is provided between the first outer tank 301 and the first inner tank 302. The first inner tank The middle part of 302 is provided with a first three-dimensional spiral biological rope filler 303; the middle part of the interlayer between the first outer tank body 301 and the first inner tank body 302 is provided with a first anoxic sludge filter layer 304; The drain end extends into the upper part of the first inner tank 302 , and the upper part of the first outer tank 301 is provided with a first drain pipe 305 , and the first drain pipe 305 is connected to the second aerobic and anoxic sedimentation tank 4 . The second aerobic and anoxic precipitation tank 4 includes a second outer tank 401 and a second inner tank 402. An interlayer is provided between the second outer tank 401 and the second inner tank 402. The second inner tank is 402 is provided with a second three-dimensional spiral biological rope filler 403 in the middle, and a second anoxic sludge filter layer 404 in the middle of the interlayer between the second outer tank 401 and the second inner tank 402. The drain end extends into the upper part of the second inner tank body 402 , the upper part of the second outer tank body 401 is provided with a second drain pipe 405 , and the second drain pipe 405 is connected to the sedimentation and clarification tank 5 . The central part of the sedimentation and clarification tank 5 is provided with a vertical guide tube 501, the middle of the interlayer between the inner wall of the sedimentation and clarification tank 5 and the vertical guide tube 501 is provided with an inclined tube settler 502, and the drainage end of the second drainage pipe 405 extends. Entering the upper part of the vertical guide tube 501, the upper part of the sedimentation and clarification tank 5 is also provided with a third drain pipe 504. The bottom of the sedimentation and clarification tank 5 is provided with a sludge pump 503, and the sludge discharge pipeline of the sludge pump 503 has two branch pipes, one of which is connected to the sludge tank 103, and the sludge discharge end of the other branch pipe extends into the front. The inner upper part of the tank body 202 . The front anoxic and anaerobic precipitation tank 2, the first aerobic and anoxic precipitation tank 3, and the second aerobic and anoxic precipitation tank 4 are respectively provided with a pre-aeration pipe 6, a first aeration pipe 7, The second aeration pipe 8 , the front aeration pipe 6 , the first aeration pipe 7 , and the second aeration pipe 8 are respectively connected to the aerator 9 installed on the ground through pipes.

In this embodiment, the sewage is lifted to the front inner tank 202 of the front anoxic and anaerobic sedimentation tank 2, the inside of the front inner tank 202 is an anoxic zone, and the front inner tank 202 is filled with three-dimensional spiral biological ropes The filler, anaerobic activated sludge, return sludge and nitrification liquid enter the upper part of the anoxic zone, and use the higher organic carbon source in the raw water to carry out denitrification and denitrification, and at the same time degrade part of the organic matter; the front outer tank 201 and the front The interlayer between the inner tanks 202, that is, the anaerobic zone, conducts mud-water separation, and the supernatant enters the first aerobic and anoxic sedimentation tank 3, and the settled activated sludge forms a high-concentration anaerobic sludge filter layer in the interlayer. 204. Due to the absence of the interference of nitrates, the phosphorus-accumulating bacteria fully release phosphorus, laying the foundation for the subsequent phase to fully absorb phosphorus in the aerobic zone. After anaerobic reaction, the macromolecular organic matter that is difficult to biodegrade becomes easily degradable small molecules organic matter, reducing the load impact on the subsequent biological reactions in the aerobic zone. The sewage enters the first inner tank 302 of the first aerobic and anoxic sedimentation tank 3 through the front drain pipe 205. The inside of the first inner tank 302 is an aerobic zone, and the aerobic zone is filled with three-dimensional spiral biological rope filler and aerobic Activated sludge, a first aeration pipe 7 is set at the bottom of the tank to supply oxygen to the suspended aerobic activated sludge and the biofilm attached to the biological rope filler, and the sewage further degrades organic pollutants and ammonia nitrogen in the aerobic zone. The ammonia nitrogen is changed into nitrite nitrogen or nitrate nitrogen, and then the sewage enters the interlayer between the first outer tank body 301 and the first inner tank body 302, that is, the anoxic zone, for mud-water separation, and the supernatant enters the second best solution. In the anoxic and anoxic sedimentation tank 4, the settled activated sludge forms a high-concentration first anoxic sludge filter layer 304 in the interlayer, and nitrate nitrogen or nitrite nitrogen is denitrified and denitrified again by microorganisms using endogenous respiration. The sewage is processed by the first aerobic and anoxic precipitation tank 3 and then enters the second aerobic and anoxic precipitation tank 4 to repeat the biochemical reaction process of the first aerobic and anoxic precipitation tank 3 . The sewage after passing through the second aerobic and anoxic precipitation tank 4 enters the vertical guide tube 501 in the center of the precipitation and clarification tank 5, and flows downward to the bottom of the tank, and then flows upward through the inclined tube precipitator 502. The purified water is discharged to rivers or reused.

The sedimented sludge at the bottom of the sedimentation and clarification tank 5 is partially returned to the anoxic area of the first aerobic and anoxic sedimentation tank 3 through the sludge pump 503, and part of it is transported to the sludge tank 103, and the supernatant of the sludge tank 103 is passed through. The return port 106 returns to the adjustment tank 102, and the concentrated sludge in the sludge tank 103 is deposited in the tank for anaerobic digestion, and is regularly transported out.

Specifically, the second drain pipe 405 is connected with the phosphorus removal and medicine addition box 10 arranged on the ground through a pipeline. The rural domestic sewage treatment system of the present invention focuses on strengthening denitrification. Since it is difficult to achieve stable compliance by removing total phosphorus by biological methods alone, a phosphorus removal and dosing box 10 for electrochemically assisted phosphorus removal is also configured, so that total phosphorus can be The controllability is stable.

Specifically, the drain end of the third drain pipe 504 is connected to the inspection well 11 , the inspection well 11 is provided with a clean water discharge pipe 1101 , and the discharge end of the clean water discharge pipe 1101 is placed above the river.

Preferably, if the reclaimed water needs to be reused, another clear water tank is built to store a part of the purified water, and the excess purified water is overflowed and discharged.

The above are preferred embodiments of the present invention, and are used to explain the technical solutions of the present invention. Those skilled in the art can also make routine modifications, equivalent replacements, and improvements within the spirit and principles of the present invention.

Claims (9)

1. a rural domestic sewage treatment system, is characterized in that: comprise sewage treatment station (1), multistage biological contact oxidation reactor, sewage treatment station (1), multistage biological contact oxidation reactor are all buried underground; The sewage treatment station (1) is internally divided into a grid tank (101), a regulating tank (102), and a sludge tank (103). The upper part of the grid tank (101) is provided with a sewage collection pipe (104), and the grid tank ( An artificial grill (105) is arranged between 101) and the adjustment tank (102), a return port (106) is arranged between the adjustment tank (102) and the sludge tank (103), and the inner bottom of the adjustment tank (102) is provided with a return port (106). A sewage lifting pump (107); the multi-stage biological contact oxidation reactor comprises a pre-anoxic and anaerobic precipitation tank (2), a first aerobic and anoxic precipitation tank (3), a second aerobic and anoxic precipitation tank (3), and a second aerobic and anoxic precipitation tank (2) connected in series in sequence The sedimentation tank (4), the sedimentation and clarification tank (5), and the sewage lifting pump (107) lift the sewage in the adjustment tank (102) to the pre-anoxic and anaerobic sedimentation tank (2) through the pipeline. 2. The rural domestic sewage treatment system according to claim 1, characterized in that: the pre-anoxic and anaerobic sedimentation tank (2) comprises a pre-external tank (201) and a pre-inner tank (202) , an interlayer is arranged between the front outer tank body (201) and the front inner tank body (202), and the front inner tank body (202) is provided with a front three-dimensional spiral biological rope filler (203) in the middle part. An anaerobic sludge filter layer (204) is arranged in the middle of the interlayer between the tank body (201) and the front inner tank body (202), and the sewage lifting pump (107) lifts the sewage in the regulating tank (102) to the The upper part of the front inner tank (202) and the upper part of the front outer tank (201) are provided with a front drain pipe (205), and the front drain pipe (205) is connected to the first aerobic and anoxic precipitation tank (3). 3. The rural domestic sewage treatment system according to claim 2, wherein the first aerobic and anoxic precipitation tank (3) comprises a first outer tank (301), a first inner tank (302) , an interlayer is arranged between the first outer tank (301) and the first inner tank (302), and a first three-dimensional spiral biological rope filler (303) is arranged in the middle of the first inner tank (302). A first anoxic sludge filter layer (304) is arranged in the middle of the interlayer between the tank body (301) and the first inner tank body (302), and the drain end of the front drain pipe (205) extends into the first inner tank body (302) In the upper part of the inner part, the upper part of the first outer tank body (301) is provided with a first drain pipe (305), and the first drain pipe (305) is connected to the second aerobic and anoxic precipitation tank (4). 4. The rural domestic sewage treatment system according to claim 3, wherein the second aerobic and anoxic sedimentation tank (4) comprises a second outer tank (401), a second inner tank (402) , an interlayer is arranged between the second outer tank (401) and the second inner tank (402), and a second three-dimensional spiral biological rope filler (403) is arranged in the middle of the second inner tank (402). A second anoxic sludge filter layer (404) is arranged in the middle of the interlayer between the tank body (401) and the second inner tank body (402), and the drain end of the first drain pipe (305) extends into the second inner tank body (402) The upper part of the inner part and the upper part of the second outer tank body (401) are provided with a second drain pipe (405), and the second drain pipe (405) is connected to the sedimentation and clarification tank (5). 5. The rural domestic sewage treatment system according to claim 4, characterized in that: a vertical guide tube (501) is arranged in the central part of the sedimentation and clarification tank (5), and the inner wall of the sedimentation and clarification tank (5) is connected with the vertical guide An inclined tube precipitator (502) is arranged in the middle of the interlayer between the flow cylinders (501), the drain end of the second drain pipe (405) extends into the upper part of the vertical flow guide cylinder (501), and the upper part of the sedimentation and clarification tank (5) is also provided. A third drain (504) is provided. 6. The rural domestic sewage treatment system according to claim 5, characterized in that: a sludge pump (503) is provided at the inner bottom of the sedimentation and clarification tank (5), and the sludge discharge pipeline of the sludge pump (503) has a Two branch pipes, one of which is connected to the sludge tank (103), and the sludge discharge end of the other branch pipe extends into the inner upper part of the front inner tank body (202). 7. The rural domestic sewage treatment system according to claim 1, characterized in that: the pre-anoxic and anaerobic sedimentation tank (2), the first aerobic and anoxic sedimentation tank (3), the second aerobic and anoxic sedimentation tank (3), and the second The inner bottom of the oxygen precipitation tank (4) is respectively provided with a pre-aeration pipe (6), a first aeration pipe (7), a second aeration pipe (8), a pre-aeration pipe (6), a first aeration pipe (6), a first The air pipe (7) and the second aeration pipe (8) are respectively connected with the aerator (9) arranged on the ground through pipes. 8. The rural domestic sewage treatment system according to claim 5, characterized in that: the drain end of the third drain pipe (504) is connected with an inspection well (11), and the inspection well (11) is provided with a clean water discharge Pipe (1101), the discharge end of the clean water discharge pipe (1101) is placed above the river. 9 . The rural domestic sewage treatment system according to claim 5 , wherein the second drainage pipe ( 405 ) is connected with a phosphorus removal and dosing box ( 10 ) arranged on the ground through pipes. 10 .

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