CN212151985U - River sewage treatment system - Google Patents
River sewage treatment system Download PDFInfo
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- CN212151985U CN212151985U CN202020113222.5U CN202020113222U CN212151985U CN 212151985 U CN212151985 U CN 212151985U CN 202020113222 U CN202020113222 U CN 202020113222U CN 212151985 U CN212151985 U CN 212151985U
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Abstract
The utility model provides a river course sewage treatment system, this system includes: the device comprises a pretreatment unit, a biochemical treatment unit, a deep treatment unit and a disinfection treatment unit; the biochemical treatment unit comprises an aerobic aeration membrane tank, and specifically comprises a hollow fiber aeration membrane for removing COD, ammonia nitrogen, partial total nitrogen and total phosphorus; the advanced treatment unit comprises a ferro-sulphur autotrophic denitrification filter tank for denitrification and dephosphorization treatment. The treated effluent quality can reach the five-class water standard of surface water.
Description
Technical Field
The utility model relates to a river course water is handled, especially relates to the river course water that goes out water quality of water after handling can reach the settlement standard is handled.
Background
The river water body treatment process is various and mainly comprises a pretreatment section, a biochemical section and an advanced treatment section.
The prior pretreatment section mainly comprises an oil separation tank, a coarse grid, a fine grid, an adjusting tank, a sedimentation tank and other processes.
The existing biochemical section mainly comprises AAO (Anaerobic-aerobic), SBR (Sequencing Batch reactor Sludge Process), an oxidation ditch, an aeration biological filter, a biological rotating disc, a biological contact oxidation method and other processes.
The prior advanced treatment section mainly comprises a denitrification filter tank, a biological nitrogen and phosphorus removal method, a coagulating sedimentation method, a sand filtration method, an activated carbon adsorption method and other processes.
The existing riverway water body treatment process has some defects:
1. the quality of the effluent water can not reach the set standard and can only reach the first-level A standard in comprehensive emission standards of pollutants (GB18918-2002) in urban sewage treatment plants, and compared with the quality standards of surface water environments, the quality of the effluent water after treatment is still 'bad five types' of water bodies, and the influence on sensitive areas of the surface water environments after the discharge is larger.
2. The aerobic tank aeration method adopted in the biochemical section has the problems of low oxygen transfer efficiency, large energy consumption, high sludge yield and the like.
3. The nitrogen and phosphorus removal method adopted by the advanced treatment section mainly comprises a denitrification filter tank, a nitrogen removal V-shaped filter tank, a high-density tank and the like, and because a large amount of carbon sources are required for nitrogen removal as electron donors, and phosphorus removal is required by adding a phosphorus removal agent, the operation cost is high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provides a river course sewage treatment system, is favorable to realizing that the play water quality of water after handling can reach five types of water standards of surface water.
The utility model provides a technical scheme that its technical problem adopted includes: provided is a river sewage treatment system, including: the device comprises a pretreatment unit, a biochemical treatment unit, a deep treatment unit and a disinfection treatment unit; the biochemical treatment unit comprises an aerobic aeration membrane tank, and specifically comprises a hollow fiber aeration membrane for removing COD, ammonia nitrogen, partial total nitrogen and total phosphorus; the advanced treatment unit comprises a ferro-sulphur autotrophic denitrification filter tank for denitrification and dephosphorization treatment.
In some embodiments, the pyrite autotrophic denitrification filter is filled with pyrrhotite.
In some embodiments, the pretreatment unit comprises a tube settler; the residual sludge in the aerobic aeration membrane tank, the backwashing water of the sulfur-iron autotrophic denitrification filter tank and the sludge are returned to the inclined tube sedimentation tank through a return pipe.
In some embodiments, the pretreatment unit further comprises a screen and a lift pump.
In some embodiments, the disinfection processing unit includes an ultraviolet disinfection tank.
Compared with the prior art, the utility model discloses a river course sewage treatment system carries out biochemical treatment ingeniously through the good oxygen aeration membrane pond including hollow fiber aeration membrane to carry out advanced treatment through the sulphur iron autotrophic denitrification filtering pond, be favorable to realizing that the play water quality of water after handling can reach five types of water standards of surface water.
Drawings
Fig. 1 is the schematic structure of the river sewage treatment system of the utility model.
FIG. 2 is a flow chart of the river sewage treatment method of the present invention.
Wherein the reference numerals are as follows: 10 river sewage treatment system 1 pretreatment unit 11 screen 12 lift pump 13 pipe chute sedimentation tank 2 biochemical treatment unit 3 advanced treatment unit 4 disinfection treatment unit 6 blower 7 sludge outward transport 8 rubbish outward transport A1 influent A2 intermediate wastewater A3 intermediate wastewater A4 intermediate wastewater A5 intermediate wastewater A6 effluent A7 backwashing water and sludge A8 excess sludge A9 sludge A10 sludge A11 rubbish A12 air supply A13 air supply.
Detailed Description
For the purpose of illustrating the structure and features of the present invention in detail, the following preferred embodiments are described in conjunction with the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of a principle structure of a river sewage treatment system of the present invention. The utility model provides a river course sewage treatment system 10, application scope is wide, and the specially adapted water environment is sensitive and the area of lack of water, and district park landscape lake, city river course, other distributed black and odorous water body are handled etc.. River sewage treatment system 10 includes: a pretreatment unit 1, a biochemical treatment unit 2, a deep treatment unit 3 and a disinfection treatment unit 4.
The pretreatment unit 1 pretreats influent water (i.e., river sewage) a 1. The effluent of the pretreatment unit 1 is intermediate wastewater A3, which has been filtered of the waste and most of the sludge in the influent a 1. The pretreatment unit 1 specifically comprises a screen 11, a lift pump 12 and an inclined tube sedimentation tank 13.
The biochemical treatment unit 2 biochemically treats the intermediate wastewater a 3. The effluent of the biochemical treatment unit 2 is intermediate wastewater A4 which still contains high content of nitrate nitrogen and phosphate. The biochemical treatment unit 2 comprises an aerobic aeration membrane tank, which specifically comprises a hollow fiber aeration membrane. The biochemical treatment unit 2 not only has the function of removing COD (Chemical Oxygen Demand) and ammonia nitrogen in the traditional aerobic tank, but also has the function of removing partial total nitrogen and total phosphorus in the traditional anoxic and aerobic tank.
The hollow fiber aeration membrane not only has the bubble-free oxygen supply function, but also can be used as a carrier for attachment and growth of the biological membrane. The hollow fiber aeration membrane divides the aerobic aeration membrane pool into three parts of a gas phase (membrane inner cavity), a biological membrane phase (attached growth) and a liquid phase (waste water), and oxygen and pollutants diffuse in different directions, so that a stable and reliable anaerobic, anoxic and aerobic three-section biological membrane phase is formed.
The advanced treatment unit 3 carries out advanced treatment on the intermediate wastewater A4. The effluent of the advanced treatment unit 3 is intermediate wastewater A5. The advanced treatment unit 3 comprises a sulfur-iron autotrophic denitrification filter, and the interior of the filter is filled with pyrrhotite. The advanced treatment unit 3 can utilize sulfur autotrophic denitrification microorganisms, take sulfur as an electron donor, take nitrate nitrogen as an electron acceptor, and reduce the nitrate nitrogen into nitrogen to realize denitrification. The sulfur autotrophic denitrifying microorganism does not need to add a carbon source. At the same time, Fe is generated during the denitrification process2+、Fe3+The adsorption of the surface film of the pyrrhotite can remove the phosphateDenitrifying phosphorus removal is carried out.
The sterilization treatment unit 4 includes an ultraviolet sterilization tank. The sterilization processing unit 4 performs sterilization processing by ultraviolet rays. The disinfection treatment unit 4 disinfects the intermediate wastewater a5 by ultraviolet rays. The effluent A6 of the disinfection treatment unit 4 can be discharged after reaching the standard or returned to the river channel to be used as regenerated water for replenishment. Through detection, the water quality index of the effluent A6 can reach the five water standards of the environmental quality standard of surface water.
Referring to fig. 2, fig. 2 is a flow schematic of the river sewage treatment method of the present invention. Referring to fig. 1, the utility model provides a river sewage treatment method, which substantially comprises the following steps:
s101, preprocessing the inlet water. The method specifically comprises the following steps: the feed water A1 was sent to the pretreatment unit 1 described above for treatment. It will be appreciated that the pretreatment employs an inclined tube settling tank for the removal of fine particles from the wastewater.
Specifically, the inlet water a1 is isolated from larger floating pieces of garbage and hair by the filter screen 11 before reaching the lift pump 12, which is beneficial to protect the lift pump 12 and prolong the life of the lift pump 12. The intermediate wastewater A2 from the lift pump 12 enters the inclined tube sedimentation tank 13 to further remove suspended matters in the wastewater, and the intermediate wastewater A3 from the inclined tube sedimentation tank 13 is the effluent of the pretreatment unit 1.
S103, carrying out biochemical treatment on the pretreated intermediate wastewater. The method specifically comprises the following steps: the intermediate wastewater A3 is sent to the biochemical treatment unit 2 for treatment. It is understood that the biochemical treatment employs an aerobic aerated membrane tank, which specifically includes a hollow fiber aerated membrane, for removal of COD, ammonia nitrogen, part of total nitrogen and total phosphorus.
And S105, carrying out advanced treatment on the intermediate wastewater after the biochemical treatment. The method specifically comprises the following steps: the intermediate wastewater A4 is sent to the advanced treatment unit 3 for treatment. It can be understood that the advanced treatment adopts a ferro-sulphur autotrophic denitrification filter for denitrification and dephosphorization.
S107, carrying out disinfection treatment on the intermediate wastewater after advanced treatment. The method specifically comprises the following steps: the intermediate wastewater a5 is sent to the disinfection treatment unit 4 for treatment. It is understood that the sterilization process employs a uv sterilization tank.
It is worth mentioning that firstly, the sludge A9 (including the residual sludge A8 of the biochemical treatment unit 2 and the backwashing water and the sludge A7 of the advanced treatment unit 3) is returned to the inclined tube sedimentation tank 13 through a return pipe to be precipitated and then is intermittently discharged, and the sludge A10 (including the sludge generated in the pretreatment process in addition to the sludge A9) discharged from the inclined tube sedimentation tank 13 is sent to the sludge export 7. Secondly, the garbage A11 separated by the filter screen 11 is sent to the garbage outward transportation 8. Thirdly, the biochemical treatment unit 2 obtains air supply A12 through the blower 6. The deepening processing unit 3 obtains an air supply a13 by a blower 6.
The utility model discloses a river course sewage treatment system and method's beneficial effect includes but is not limited to:
1. the effluent quality standard is high, and the influence on a water environment sensitive area is reduced.
2. The aerobic aeration tank comprises a hollow fiber aeration membrane, the oxygen utilization rate can be improved, the sludge yield can be reduced, and meanwhile, the formed three-section membrane combines anaerobic organic matter removal and autotrophic denitrification nitrogen and phosphorus removal, so that the aims of multi-element circulation and multi-pollutant removal are fulfilled.
3. The sulfur autotrophic denitrification microorganisms in the sulfur-iron autotrophic denitrification filter tank are utilized to realize denitrification and denitrification without adding carbon sources.
4. By utilizing the precipitation of iron ions in the sulfur-iron autotrophic denitrification filter, phosphate is adsorbed on the pyrrhotite surface film, and then phosphorus is removed.
5. The cryptosporidium and giardia which are ultraviolet disinfection clean and have no secondary pollution and tolerance to chlorine disinfection have good inactivation effect.
6. The sludge generated by the system is discharged in a unified and intermittent manner, and the subsequent sludge treatment is facilitated.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and is not intended to limit the present invention. All such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention.
Claims (5)
1. A river sewage treatment system comprising: the device comprises a pretreatment unit, a biochemical treatment unit, a deep treatment unit and a disinfection treatment unit; the device is characterized in that the biochemical treatment unit comprises an aerobic aeration membrane tank, and specifically comprises a hollow fiber aeration membrane for removing COD, ammonia nitrogen, partial total nitrogen and total phosphorus; the advanced treatment unit comprises a ferro-sulphur autotrophic denitrification filter tank for denitrification and dephosphorization treatment.
2. The river sewage treatment system of claim 1, wherein the inside of the sulfur-iron autotrophic denitrification filter is filled with pyrrhotite.
3. The river sewage treatment system of claim 1 wherein the pretreatment unit comprises a sloped tube settling tank; the residual sludge in the aerobic aeration membrane tank, the backwashing water of the sulfur-iron autotrophic denitrification filter tank and the sludge are returned to the inclined tube sedimentation tank through a return pipe.
4. The river sewage treatment system of claim 3 wherein the pretreatment unit further comprises a screen and a lift pump.
5. The river sewage treatment system of claim 1 wherein the disinfection treatment unit comprises an ultraviolet disinfection tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020113222.5U CN212151985U (en) | 2020-01-17 | 2020-01-17 | River sewage treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020113222.5U CN212151985U (en) | 2020-01-17 | 2020-01-17 | River sewage treatment system |
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| CN212151985U true CN212151985U (en) | 2020-12-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114044609A (en) * | 2021-11-19 | 2022-02-15 | 江苏力鼎环保装备有限公司 | AO device and AO technology for efficiently removing nitrogen and phosphorus |
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- 2020-01-17 CN CN202020113222.5U patent/CN212151985U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114044609A (en) * | 2021-11-19 | 2022-02-15 | 江苏力鼎环保装备有限公司 | AO device and AO technology for efficiently removing nitrogen and phosphorus |
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