CN213652210U

CN213652210U - Sewage treatment device for village and town sewage treatment

Info

Publication number: CN213652210U
Application number: CN202022662761.7U
Authority: CN
Inventors: 褚金灿; 詹成龙; 卜祖坤
Original assignee: Wuhan Xinjielong Technology Co ltd
Current assignee: Wuhan Xinjielong Technology Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-07-09
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses a sewage treatment device for village and town sewage treatment, which comprises a device body, wherein the device body comprises a biochemical tank and a sedimentation tank; the front end of the device body is provided with a water inlet, and the rear end is provided with a water outlet; the biochemical tank is positioned at the front side of the sedimentation tank; the outlet of the biochemical tank is communicated with the inlet of the sedimentation tank; a biological membrane carrier is arranged inside the biochemical pool in a matching way; the top of the biochemical pool is provided with an aeration fan, and the bottom of the biochemical pool is provided with a plurality of aeration pipes communicated with the aeration fan at intervals; the aeration pipe is correspondingly arranged below the biological membrane carrier; a mud-water separation filler is arranged in the sedimentation tank; a liquid outlet is formed in the bottom of the sedimentation tank, a backflow port is formed in the front end of the device body, and the liquid outlet is communicated with the backflow port through a backflow pump; the bottom of the sedimentation tank is communicated with a sludge discharge pump through a sludge discharge port. The utility model discloses not only can be high-efficient low consumption handle rural domestic sewage for sewage discharge to reach standard, convenient operation has improved rural area's environmental quality simultaneously moreover.

Description

Sewage treatment device for village and town sewage treatment

Technical Field

The utility model relates to a sewage treatment plant especially relates to a sewage treatment plant for villages and small towns sewage treatment, belongs to villages and small towns sewage treatment field.

Background

In recent years, with the development of rural economy and the improvement of the living standard of farmers, rural infrastructure and living environment are greatly changed. Meanwhile, the discharge amount of rural domestic sewage is continuously increased, and the discharge amount of rural sewage in China is estimated to reach more than 250 hundred million tons in 2020. In view of the fact that most rural areas do not have a drainage pipe network and a sewage treatment system at present, most domestic sewage is discharged at will and directly enters local natural water bodies, and even a small part of domestic sewage can seriously pollute the water bodies after being simply treated by a septic tank. Therefore, the rural domestic sewage becomes one of the main pollution sources of the rural water body pollution at present, so that the environmental condition of rural areas is worsened day by day, the environmental quality is obviously reduced, the living environment and the body health of vast farmers are directly threatened, and the healthy development of rural economy is restricted.

At present, the commonly used rural sewage treatment comprises processes such as an activated sludge process, a biofilm process, an artificial rapid infiltration process and the like. The rural domestic sewage treatment work is urgent, and how to treat sewage with high efficiency, low consumption and convenient operation to ensure that the sewage reaches the standard and is discharged is a main subject in the rural sewage treatment field.

SUMMERY OF THE UTILITY MODEL

In order to solve the weak point that above-mentioned technique exists, the utility model discloses a combine biofilm reactor and activated sludge method's advantage separately, solve the contradiction of denitrogenation and dephosphorization simultaneously, it is good to provide a play water quality of water, and synchronous denitrogenation dephosphorization is effectual, and the biofilm formation is stable, and the energy consumption is low, and volume load is high, and the operation is simple and convenient and can unmanned on duty, takes up an area of few sewage treatment plant that is used for villages and small towns sewage treatment's biofilm reactor and activated sludge coexistent.

In order to solve the technical problem, the utility model discloses a technical scheme is: a sewage treatment device for village and town sewage treatment comprises a device body, wherein the device body comprises a biochemical tank and a sedimentation tank; the front end of the device body is provided with a water inlet, and the rear end is provided with a water outlet; the biochemical tank is positioned at the front side of the sedimentation tank; the outlet of the biochemical tank is communicated with the inlet of the sedimentation tank;

a biological membrane carrier is arranged inside the biochemical pool in a matching way; the top of the biochemical pool is provided with an aeration fan, and the bottom of the biochemical pool is provided with a plurality of aeration pipes communicated with the aeration fan at intervals; the aeration pipe is correspondingly arranged below the biological membrane carrier;

a mud-water separation filler is arranged in the sedimentation tank; a liquid outlet is formed in the bottom of the sedimentation tank, a backflow port is formed in the front end of the device body, and the liquid outlet is communicated with the backflow port through a backflow pump; the bottom of the sedimentation tank is communicated with a sludge discharge pump through a sludge discharge port.

Further, the biomembrane carrier is fixed bed filler or corrugated filler; the mud-water separation filler is honeycomb inclined tube filler or inclined plate filler.

Furthermore, the return port is positioned below the biochemical tank and at the front side of the aeration pipe.

Further, the aeration fan is positioned on the outer wall of the biochemical pool; the aeration pipe is positioned on the inner wall of the biochemical tank.

Further, the water inlet is positioned at the lower part of the front end of the biochemical pool; the water outlet is positioned at the upper part of the rear end of the sedimentation tank.

The utility model discloses not only can be high-efficient low consumption handle rural domestic sewage for sewage discharge to reach standard, convenient operation has improved rural area's environmental quality simultaneously moreover, has extensive suitability.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1. a biochemical pool; 2. a sedimentation tank; 3. a biofilm carrier; 4. an aeration fan; 5. an aeration pipe; 6. a water inlet; 7. a water outlet; 8. a mud-water separation filler; 9. a sludge discharge pump; 10. a reflux pump; 11. a liquid discharge port; 12. a return port.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the sewage treatment device for village and town sewage treatment comprises a device body, wherein the device body comprises a biochemical tank 1 and a sedimentation tank 2; the front end of the device body is provided with a water inlet 6, and the rear end is provided with a water outlet 7; the water inlet 6 is positioned at the lower part of the front end of the biochemical pool 1; the water outlet 7 is positioned at the upper part of the rear end of the sedimentation tank 2. The biochemical tank 1 is positioned at the front side of the sedimentation tank 2; the outlet of the biochemical tank 1 is communicated with the inlet of the sedimentation tank 2; the sewage to be treated enters the device body from the water inlet 6 and is sequentially treated by the biochemical tank 1 and the sedimentation tank 2, the clear water obtained after treatment is discharged from the water outlet 7, and the sludge generated in the sedimentation tank 2 is discharged through the sludge discharge pump 9.

The design utilizes the microorganism to be attached to the surface of the biological membrane carrier 3, and the pollutants are decomposed by the adsorption of organic matters, the diffusion of oxygen to the interior of the biological membrane carrier 3, the biological oxidation generated in the biological membrane carrier 3 and other actions in the process that sewage flows through the surface of the biological membrane carrier 3. Biochemical effluent of the biochemical tank 1 enters a sedimentation tank 2 at the rear end, and solid-liquid separation is carried out on the sedimentation tank 2 through a mud-water separation filler 8, so that a stable effluent clarifying effect is achieved.

A biological membrane carrier 3 is arranged inside the biochemical pool 1 in a matching way; the top of the biochemical pool 1 is provided with an aeration fan 4, and the bottom is provided with a plurality of aeration pipes 5 communicated with the aeration fan 4 at intervals; the aeration pipe 5 is correspondingly arranged below the biological membrane carrier 3; the aeration fan 4 is positioned on the outer wall of the biochemical pool 1; the aeration pipe 5 is positioned on the inner wall of the biochemical tank 1. Air is supplied to the aeration pipe 5 by the aeration fan 4.

Aeration is a low-flux microporous aeration technology, and can generate uniform micro-bubbles with the average diameter of 1mm on the surface layer of the aeration pipe 5. The aeration pipe 5 adopts a hose type aerator, not only the energy consumption is low, but also the aeration is combined with the biomembrane technology, the sufficient oxygen supply is ensured, and the oxygen mass transfer efficiency is high.

A mud-water separation filler 8 is arranged in the sedimentation tank 2; a liquid outlet 11 is formed at the bottom of the sedimentation tank 2, a return port 12 is formed at the front end of the device body, and the liquid outlet 11 is communicated with the return port 12 through a return pump 10; the bottom of the sedimentation tank 2 is communicated with a sludge pump 9 through a sludge discharge port. The return port 12 is positioned below the biochemical tank 1 and in front of the aeration pipe 5.

In order to improve the removal rate of various indexes, particularly TN (total nitrogen) indexes, the removal of the total nitrogen is enhanced by using activated sludge coexisting with a biological membrane. The design is mainly characterized in that a reflux pump 10 is additionally arranged at the inlet of an aeration pipe 5 of an aeration zone, so that sludge-water mixed liquor precipitated by a sedimentation tank 2 flows back to the aeration zone of a biochemical tank 1, and activated sludge and a biological film coexist in the biochemical tank 1, thereby improving the removal rate of total nitrogen.

The biological film carrier 3 is fixed bed filler or wave-shaped filler; the mud-water separation filler 8 is a honeycomb inclined tube filler or an inclined plate filler. After the biomembrane carrier 3 is adopted, the carrier filler is 1-2mm in biofilm formation, so that the biofilm formation is stable and light; the specific surface area of the carrier filler is more than 240m2/m3, so the volume load is high, and the total volume of the biofilm carrier 3 in the sewage treatment device can reach 60-80%. The mud-water separation filler technology is mainly realized by the mud-water separation filler 8, and the mud-water mixture is subjected to the mud-water separation filler 8 and a shallow layer precipitation theory, so that the solid-liquid separation efficiency is improved, and compared with the traditional inclined tube and inclined plate filler, the water outlet effect is more clear and stable.

The utility model discloses a working process does:

arranging a biological membrane carrier 3 in a biochemical pool 1, under the condition that a special aerator aeration pipe 5 at the bottom of the biochemical pool 1 is continuously oxygenated, microorganisms are gathered and attached on the surface of the biological membrane carrier 3 to form a biological membrane, and when oxygenated sewage rises at a certain flow rate and flows through the biological membrane carrier 3, the microorganisms in the biological membrane carrier 3 absorb and decompose organic matters in the water, so that the sewage is purified, the microorganisms are proliferated, and the biological membrane is thickened;

after the microorganisms are gathered and attached on the surface of the biological membrane carrier 3 to form a biological membrane, a thin water layer exists on the surface of the biological membrane carrier due to the adsorption effect of the biological membrane, and organic matters in the water layer are oxidized and decomposed by the biological membrane, so that the concentration of the organic matters in the water layer is much lower than that of the organic matters in the sewage entering from the water inlet 6;

the microorganisms on the biofilm decompose organic substances in the presence of dissolved oxygen and metabolize the microorganisms themselves, so that the produced inorganic substances such as carbon dioxide are transferred in the opposite direction, i.e., from the biofilm through the attached water layer into the flowing sewage or air. Thus, the organic content of the effluent is reduced, and the sewage is purified. When the biological membrane grows to a certain thickness, oxygen diffusing to the interior of the biological membrane is limited, the surface of the biological membrane is still in an aerobic state, and the inner layer is in an anoxic or even anaerobic state, and finally the biological membrane falls off. Then, new biological membranes continue to grow on the surface of the biological membrane carrier 3, and the process is repeated repeatedly, so that the sewage is purified.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) energy conservation and consumption reduction: the high-efficiency aeration technology can greatly improve the oxygen utilization rate and reduce the energy consumption;

(2) the operation and maintenance amount is small: the process has short flow, few devices, low failure rate, simple and convenient daily maintenance and simple operation management;

(3) the operation is stable: the process conforms to the natural law of microbial degradation, has the characteristics of biological contact oxidation process and film-forming film, and has strong impact resistance and self-recovery capability.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and the technical personnel in the technical field are in the present invention, which can also belong to the protection scope of the present invention.

Claims

1. The utility model provides a sewage treatment plant for villages and small towns sewage treatment, includes the device body, its characterized in that: the device body comprises a biochemical tank (1) and a sedimentation tank (2); the front end of the device body is provided with a water inlet (6), and the rear end is provided with a water outlet (7); the biochemical tank (1) is positioned on the front side of the sedimentation tank (2); the outlet of the biochemical tank (1) is communicated with the inlet of the sedimentation tank (2);

a biological membrane carrier (3) is arranged inside the biochemical pool (1) in a matching way; the top of the biochemical pool (1) is provided with an aeration fan (4), and the bottom is provided with a plurality of aeration pipes (5) which are communicated with the aeration fan (4) at intervals; the aeration pipe (5) is correspondingly arranged below the biological membrane carrier (3);

a mud-water separation filler (8) is arranged in the sedimentation tank (2); a liquid outlet (11) is formed in the bottom of the sedimentation tank (2), a backflow port (12) is formed in the front end of the device body, and the liquid outlet (11) is communicated with the backflow port (12) through a backflow pump (10); the bottom of the sedimentation tank (2) is communicated with a sludge pump (9) through a sludge discharge port.

2. The sewage treatment apparatus for village and town sewage treatment according to claim 1, wherein: the biological film carrier (3) is fixed bed filler or corrugated filler; the mud-water separation filler (8) is a honeycomb inclined tube filler or an inclined plate filler.

3. The sewage treatment apparatus for village and town sewage treatment according to claim 2, wherein: the return port (12) is positioned below the biochemical tank (1) and at the front side of the aeration pipe (5).

4. The sewage treatment apparatus for village and town sewage treatment according to claim 3, wherein: the aeration fan (4) is positioned on the outer wall of the biochemical pool (1); the aeration pipe (5) is positioned on the inner wall of the biochemical tank (1).

5. The sewage treatment plant for village and town sewage treatment according to claim 4, wherein: the water inlet (6) is positioned at the lower part of the front end of the biochemical pool (1); the water outlet (7) is positioned at the upper part of the rear end of the sedimentation tank (2).