CN215517081U

CN215517081U - Underground integrated rural domestic sewage treatment system

Info

Publication number: CN215517081U
Application number: CN202121574983.1U
Authority: CN
Inventors: 徐兆静; 付翔; 黄波; 邱宇飞
Original assignee: Shanghai Chuanqingqing Environmental Technology Co ltd
Current assignee: Shanghai Chuanqingqing Environmental Technology Co ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2022-01-14
Anticipated expiration: 2031-07-12

Abstract

A rural domestic sewage treatment system of formula of burying integration includes: catchment equalizing basin and set gradually in the first membrane pond, second membrane pond, third membrane pond, dephosphorization pond, sedimentation tank and the clean water basin of its output, wherein: the first membrane pool, the second membrane pool and the third membrane pool form a three-stage membrane pool, clear water is discharged from the output end of the clear water pool, and an anaerobic filter pool is arranged in the first membrane pool; all be equipped with membrane aeration bioreactor in second membrane tank, the third membrane tank, this membrane aeration bioreactor includes: the biological membrane biological filter comprises a plurality of parallel hollow fiber pipes and biological membranes arranged on the outer layers of the hollow fiber pipes, wherein a cavity connected with a fan is arranged in each hollow fiber pipe. This device passes through physical filtration, microbial degradation, can effectively get rid of organic substance and nitrogen phosphorus nutrient, has the advantage that degree of automation is high, the management of being convenient for, and the quality of water that not only goes out is good to higher stability has.

Description

Underground integrated rural domestic sewage treatment system

Technical Field

The utility model relates to a technology in the field of sewage treatment, in particular to a buried integrated rural domestic sewage treatment system.

Background

The processes adopted in the integrated domestic sewage treatment at present mainly comprise the traditional activated sludge technology, Membrane Biological Reaction (MBR) technology, contact oxidation technology and the like. The advantage of the traditional activated sludge technology is that the MBR technology that is more advanced is: the effluent quality is good; the impact resistance is strong, and the automation degree is high; the facility is compact and the occupied area is small; the sludge yield is small, even no sludge is generated. However, MBR techniques have the disadvantages: the investment is large, the manufacturing cost of the membrane component is high, the service life of the membrane component is short (about 5 years) except high energy consumption in the operation process, and the replacement cost is high; the phosphorus removal effect is not good, and if the total phosphorus of the effluent is required to reach the standard, a medicament is required to be added to form sludge output. The other contact oxidation technology has the advantages compared with the former two technologies: the microbial biomass is large, and the processing capacity is strong; the sludge age is long, and the sludge yield is low; operations such as back washing and the like are not needed, and the power consumption is less; simple structure, low construction and operation cost. However, the contact oxidation technology has the following disadvantages: a carbon source is required to be added in an anaerobic section, so that the operation cost is increased; the phosphorus removal effect is not good, and if the total phosphorus of the effluent is required to reach the standard, a medicament is required to be added to form sludge output.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a buried integrated rural domestic sewage treatment system, which can effectively remove organic substances, nitrogen and phosphorus nutrients through physical filtration and microbial degradation, has the advantages of high automation degree and convenience in management, and has good effluent quality and higher stability.

The utility model is realized by the following technical scheme:

the utility model relates to a buried integrated rural domestic sewage treatment system, which comprises: catchment equalizing basin and set gradually in the first membrane pond, second membrane pond, third membrane pond, dephosphorization pond, sedimentation tank and the clean water basin of its output, wherein: the first membrane pool, the second membrane pool and the third membrane pool form a three-stage membrane pool, and the output end of the clean water pool discharges clean water.

An anaerobic filter tank is arranged in the first membrane tank; all be equipped with membrane aeration bioreactor in second membrane tank and the third membrane tank, this membrane aeration bioreactor includes: the biological membrane biological filter comprises a plurality of parallel hollow fiber tubes and biological membranes arranged on the outer layers of the hollow fiber tubes, wherein the hollow fiber tubes are internally provided with cavities.

And the bottoms of the second membrane tank, the third membrane tank and the phosphorus removal tank are connected with a fan to realize aeration.

The equalizing basin catchments sewage through burying underground the inlet tube collection sewage underground, be equipped with grid and sewage pump in this equalizing basin catchments, wherein: and the sewage pump conveys the sewage filtered by the grating to the first membrane tank.

Technical effects

Compared with a conventional contact oxidation system, the oxygen-enriched aeration system has the advantages that through the innovative structural design, oxygen is directly utilized by the microbial membrane after being transmitted out of the oxygen-permeable membrane, the mass transfer resistance of a water-gas interface is avoided, and the utilization rate of the oxygen is more than four times (up to 60%) of that of a conventional contact oxidation method, so that the energy consumption for aeration and oxygenation is greatly reduced; the proportion of nitrification reaction and denitrification reaction in the biological membrane can be controlled by controlling the aeration rate, so that the effective denitrification of the water body is realized; and the defect of poor dephosphorization effect of the conventional contact oxidation method is effectively overcome by an iron-carbon filling method.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a catchment equalizing basin;

FIG. 3 is a schematic view of a membrane aeration bioreactor;

FIG. 4 is a schematic cross-sectional view of FIG. 3;

FIG. 5 is a schematic view of a settling tank;

in the figure: the device comprises a water collecting and adjusting tank 1, a first membrane tank 2, a second membrane tank 3, a third membrane tank 4, a phosphorus removal tank 5, a sedimentation tank 6, a clean water tank 7, a fan 9, a water inlet pipe 101, a grid 102, a sewage pump 103, an anaerobic filter 201, an iron-carbon micro-electrolysis filler plate 501, a sludge discharge pipe 601, an inclined flow mechanism 602, a water outlet pipe 701, a membrane aeration bioreactor 10, a biological membrane 1001, a hollow fiber pipe 1002, a cavity 1003, an aerobic layer a, a facultative layer b, an anaerobic layer c, a water body 11 and sludge 12.

Detailed Description

As shown in fig. 1 and 2, the present embodiment relates to a buried integrated rural domestic sewage treatment system, which includes: catchment equalizing basin 1 and set gradually in the first membrane cisterna 2, second membrane cisterna 3, third membrane cisterna 4, dephosphorization pond 5, sedimentation tank 6 and clean water basin 7 of its output, wherein: the first membrane pool 2, the second membrane pool 3 and the third membrane pool 4 form a three-stage membrane pool, and clear water is discharged from the output end of the clear water pool 7.

The bottoms of the second membrane tank 3, the third membrane tank 4 and the dephosphorization tank 5 are all connected with a fan 9 to realize aeration.

The collecting and adjusting tank 1 collects sewage through a water inlet pipe 101 buried underground, a grid 102 and a sewage pump 103 are arranged in the collecting and adjusting tank 1, wherein: the sewage pump 103 delivers the grille-filtered sewage to the first membrane tank 2.

An anaerobic filter 201 is arranged in the first membrane tank 2.

The second membrane tank 3 and the third membrane tank 4 are both provided with a membrane aeration bioreactor 10 shown in fig. 3 and 4, and the membrane aeration bioreactor 10 comprises: the biological membrane bioreactor comprises a plurality of parallel hollow fiber tubes 1002 and biological membranes 1001 arranged on the outer layers of the hollow fiber tubes 1002, wherein cavities 1003 are formed in the hollow fiber tubes 1002.

As shown in fig. 4, the biofilm 1001 sequentially comprises an aerobic layer a, a facultative layer b and an anaerobic layer c from inside to outside, three process stages of anaerobic process, anoxic process and aerobic process are realized by controlling the aeration amount in the membrane tank, and most of COD, BOD and ammonia nitrogen are degraded and removed under the multiple anaerobic, facultative and aerobic decomposition action of the MABR biofilm.

The aerobic layer a is preferably provided with a heterotrophic bacteria bag and a nitrifying bacteria bag.

The anaerobic layer c is preferably provided with a denitrifying bacteria bag.

The phosphorus removal tank 5 is internally provided with an iron-carbon micro-electrolysis filler plate 501, the filler can release iron ions through the reaction of a primary battery and is combined with phosphate radical to form insoluble compound precipitate so as to remove phosphorus in the water body.

As shown in fig. 5, the sedimentation tank 6 is provided with an inclined flow mechanism 602, which can remove suspended matters and fallen biological films in water by adjusting the flow direction of the inlet water, and the outlet water of the sedimentation tank automatically flows into the clean water tank.

The bottom of the sedimentation tank 6 is further provided with a sludge discharge pipe 601 to realize the automatic removal of sediment at regular intervals.

The system works in the following way: the effluent of the membrane pool enters a phosphorus removal pool, wherein an iron-carbon micro-electrolysis filler plate is arranged, and the filler can release iron ions through the reaction of a primary battery and is combined with phosphate radical to form insoluble compound precipitate so as to remove phosphorus in a water body; the effluent of the dephosphorization tank enters a sedimentation tank, a honeycomb inclined tube is arranged in the sedimentation tank, suspended matters and dropped biological membranes in the water are removed through the sedimentation of the inclined tube, and the effluent of the sedimentation tank automatically flows into a clean water tank for recycling or discharging. The sludge at the bottom of the sedimentation tank can flow back to the front end of the system, the residual sludge at the bottom is cleaned regularly by using a sewage suction truck, and the effect data of the device is shown in table 1.

TABLE 1

Compared with the prior art, when the device is used for aeration and oxygen supply, oxygen permeates through the membrane filaments and is directly utilized by the biological membrane without passing through a liquid phase boundary layer, so that the mass transfer resistance of the oxygen is greatly reduced, and the oxygen supply speed and the oxygen utilization rate are favorably improved; oxygen and a substrate are transmitted in opposite directions, and the biological membrane can be obviously layered by controlling oxygen supply, so that the effects of simultaneously nitrifying and denitrifying and removing organic matters are achieved; the defect of poor dephosphorization effect of the conventional contact oxidation method is effectively overcome by the iron-carbon filling method.

The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the utility model, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. The utility model provides a rural domestic sewage treatment system of formula of burying integration which characterized in that includes: catchment equalizing basin and set gradually in the first membrane pond, second membrane pond, third membrane pond, dephosphorization pond, sedimentation tank and the clean water basin of its output, wherein: the first membrane pool, the second membrane pool and the third membrane pool form a three-stage membrane pool, and clean water is discharged from the output end of the clean water pool;

2. The buried integrated rural domestic sewage treatment system according to claim 1, wherein the bottoms of the second membrane tank, the third membrane tank and the phosphorus removal tank are all connected with a fan to realize aeration.

3. The buried integrated rural domestic sewage treatment system according to claim 1, wherein the collecting and adjusting tank collects sewage through a water inlet pipe buried underground, and a grid and a sewage pump are provided in the collecting and adjusting tank, wherein: and the sewage pump conveys the sewage filtered by the grating to the first membrane tank.

4. The buried integrated rural domestic sewage treatment system according to claim 1, wherein the biofilm comprises an aerobic layer, a facultative layer and an anaerobic layer in sequence from inside to outside.

5. The buried integrated rural domestic sewage treatment system according to claim 4, wherein a heterotrophic bacteria bag and a nitrifying bacteria bag are arranged in the aerobic layer; the anaerobic layer is internally provided with a denitrifying bacteria bag.

6. The buried integrated rural domestic sewage treatment system according to claim 1, wherein an iron-carbon microelectrolysis filler plate is arranged in the phosphorus removal tank.

7. The buried integrated rural domestic sewage treatment system according to claim 1, wherein an inclined flow mechanism is provided in the sedimentation tank to adjust the inflow.

8. The buried integrated rural domestic sewage treatment system according to claim 1 or 7, wherein the bottom of the sedimentation tank is further provided with a sludge discharge pipe to realize automatic removal of sediment at regular intervals.