CN217535745U - Domestic sewage treatment system - Google Patents
Domestic sewage treatment system Download PDFInfo
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- CN217535745U CN217535745U CN202221045716.XU CN202221045716U CN217535745U CN 217535745 U CN217535745 U CN 217535745U CN 202221045716 U CN202221045716 U CN 202221045716U CN 217535745 U CN217535745 U CN 217535745U
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Abstract
The utility model provides a domestic sewage treatment system, which comprises a sewage inlet pipe and a grit chamber connected with the sewage inlet pipe; the grit chamber is connected with equalizing basin and mummification pond respectively, and the equalizing basin is connected with the anaerobism pond to the equalizing basin is connected with the mummification pond, and the anaerobism pond is connected with the oxygen deficiency pond, and the oxygen deficiency pond is connected with good oxygen MBBR pond, and good oxygen MBBR pond is connected with the pipe chute sedimentation tank, and the pipe chute sedimentation tank is connected with ultraviolet disinfector, and the pipe chute sedimentation tank is connected with the mummification pond. The utility model discloses a domestic sewage treatment system handles through the processing technology of "anaerobism + oxygen deficiency + MBBR contact oxidation + chemical phosphorus removal + ultraviolet sterilization", and processing technology is ripe reliable to it can effectively get rid of most organic matters in the sewage and pollutants such as N, P, SS, makes domestic sewage discharge to reach standard, and the pollution of the regional river of significantly reducing effectively improves basin water environmental quality.
Description
Technical Field
The utility model relates to a sewage treatment technical field, concretely relates to domestic sewage treatment system.
Background
Domestic sewage is wastewater discharged in daily life of residents and mainly comes from residential buildings and public buildings, such as houses, institutions, schools, hospitals, shops, public places, industrial enterprise toilets and the like. The pollutants contained in the domestic sewage are mainly organic matters (such as protein, carbohydrate, fat, urea, ammonia nitrogen and the like) and a large amount of pathogenic microorganisms (such as parasitic ova, enteroinfectious viruses and the like). Organic matters existing in domestic sewage are extremely unstable and easily decomposed to generate offensive odor. Bacteria and pathogens propagate in large quantities by taking organic matters in domestic sewage as nutrition, and can cause epidemic of infectious diseases. Therefore, domestic sewage must be treated before being discharged.
The domestic sewage treatment can be discharged after meeting the water pollutant discharge standard of the domestic sewage treatment facility. In the prior art, a common domestic sewage treatment system has the problem of inconvenient management, and simultaneously, the sewage treatment system also has the problems of sludge bulking and unstable water quality, and the whole sewage treatment system can not finish simultaneous denitrification.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a domestic sewage treatment system for there is the problem that management is inconvenient, mud inflation and quality of water are unstable in the domestic sewage treatment system among the solution prior art.
In order to achieve the above object, an embodiment of the present invention provides a sand basin comprising a sewage inlet pipe and a sand basin connected to the sewage inlet pipe;
the grit chamber is connected with equalizing basin and mummification pond respectively, and the equalizing basin is connected with the anaerobism pond to the equalizing basin is connected with the mummification pond, and the anaerobism pond is connected with the oxygen deficiency pond, and the oxygen deficiency pond is connected with good oxygen MBBR pond, and good oxygen MBBR pond is connected with the pipe chute sedimentation tank, and the pipe chute sedimentation tank is connected with ultraviolet disinfector, and the pipe chute sedimentation tank is connected with the mummification pond.
The utility model discloses a solve the problem that sewage treatment system easily takes place to block up, it is preferred that the inside grid net that is provided with of grit chamber.
Preferably, a lift pump is installed inside the regulating reservoir.
Preferably, a flow meter is arranged between the regulating tank and the anaerobic tank.
Preferably, the inside of the anaerobic tank is filled with biological fillers.
Preferably, a submersible mixer is arranged inside the anoxic tank, suspended fillers are filled inside the anoxic tank and the aerobic MBBR tank,
preferably, the aerobic MBBR tank is connected with an air blower, and a reflux pump is arranged in the aerobic MBBR tank.
Preferably, the inclined tube sedimentation tank is provided with a phosphorus removal agent feeding device, and inclined tube filler is filled in the inclined tube sedimentation tank.
Preferably, an electric butterfly valve is arranged between the inclined tube sedimentation tank and the drying tank.
To sum up, the beneficial effects of the utility model are that:
1. the utility model discloses a domestic sewage enters into the grit chamber from sewage inlet pipe, and reentrant equalizing basin carries out the water yield regulation, flows through anaerobism pond, oxygen deficiency pond, good oxygen MBBR pond in proper order after the regulation, and from good oxygen MBBR pond backward flow to the oxygen deficiency pond, reentrant good oxygen MBBR pond and pipe chute sedimentation tank again, sludge after pipe chute sedimentation tank deposit gets into in the mummification pond, and the supernatant gets into the disinfection pond, discharges after the disinfection of ultraviolet disinfector; meanwhile, the sludge in the drying tank is dried and transported outside, and the residual sewage flows back to the regulating tank. The whole domestic sewage treatment system is treated by the treatment processes of 'anaerobic treatment, anoxic treatment, MBBR contact oxidation treatment, chemical phosphorus removal and ultraviolet sterilization', and the treatment processes are mature and reliable.
2. The utility model discloses a domestic sewage treatment system can effectively remove most organic matters and pollutants such as N, P, SS in the sewage, makes domestic sewage discharge to reach standard, and the pollution of the regional river of significantly reducing effectively improves basin water environment quality, is favorable to protecting and improves the healthy of people, reduces the citizen disease and takes place, maintains the stability of society and reunites.
3. The utility model is provided with a grid net inside, which is used for removing large granular impurities and garbage sundries such as garbage bags and toilet paper contained in domestic wastewater, and preventing the sundries from entering the subsequent treatment process to cause the blockage of pipelines and facilities; meanwhile, the arrangement of the grid net can also ensure the normal operation of the water pump and reduce the abrasion of the water pump.
4. The sewage treatment system of the utility model adopts the MBBR biological contact oxidation method to treat sewage, and the biological contact oxidation method of the MBBR is respectively anaerobic, facultative and aerobic in the biological contact oxidation method of the filler biomembranes from inside to outside, can realize the nitrification and denitrification in the same pool, reduce the number of structures and save investment cost; the system also has the advantages of strong tolerance to impact load and water quality change, stable operation, high volume load, small occupied area, lower construction cost, lower sludge yield, no need of sludge backflow and simple operation management.
Drawings
Fig. 1 is a schematic connection diagram of an embodiment of the present invention.
The method comprises the following steps of 1-sewage inlet pipe, 2-grit chamber, 3-regulating tank, 4-drying tank, 5-anaerobic tank, 6-anoxic tank, 7-aerobic MBBR tank, 8-inclined tube sedimentation tank, 9-ultraviolet sterilizer, 10-grid net, 11-lift pump, 12-flowmeter, 13-biological filler, 14-submersible mixer, 15-suspension filler, 16-blower, 17-reflux pump, 18-phosphorus removing agent feeding device, 19-inclined tube filler and 20-electric butterfly valve.
Detailed Description
The utility model provides a domestic sewage treatment system, advance tub 1 and advance tub 1 grit chamber 2 that is connected with sewage including sewage, sewage advances tub 1 by sewage and gets into in grit chamber 2 to accomplish the sediment of sediment such as less silt in the sewage in grit chamber 2. The sand basin 2 is internally provided with a grid net 10, and the grid net 10 is used for removing large-particle impurities, garbage bags, toilet paper and other garbage impurities contained in domestic sewage, so that the impurities are prevented from entering a subsequent treatment process to cause the blockage of pipelines and facilities; meanwhile, the larger garbage in the sewage is removed through the grid net 10, so that the normal operation of the water pump can be ensured, and the abrasion of the water pump is reduced.
The grit chamber 2 is respectively connected with an adjusting tank 3 and a drying tank 4 through pipelines, sediment such as silt precipitated in the grit chamber 2 enters the drying tank 4, and precipitated sewage enters the adjusting tank 3. Two lifting pumps 11 are arranged in the adjusting tank 3, one lifting pump 11 is in normal operation, and the other lifting pump 11 is used for standby. Because the discharge of the domestic sewage in the daytime and at night has the characteristics of time-interval nonuniformity and larger time-varying coefficient, the influence of the impact load caused by the discharge variation of the domestic sewage in different time intervals is reduced as much as possible to achieve the ideal treatment effect when a subsequent treatment system is operated in a balanced manner. The adjusting tank 3 utilizes the larger tank capacity to homogenize the size change of the sewage flow and the change of the sewage water quality concentration in different time periods, and combines the constant flow of the lifting pump 11 to keep the sewage water quality and the flow in a relatively stable state in the subsequent process treatment section, so that the treatment effect is prevented from being influenced by the impact load.
The adjusting tank 3 is connected with an anaerobic tank 5 through a pipeline, and the adjusting tank 3 is also connected with a drying tank 4 through a pipeline. The adjusting tank 3 conveys the wastewater into the anaerobic tank 5, a flow meter 12 is arranged between the adjusting tank 3 and the anaerobic tank 5, and the flow meter 12 is used for controlling the amount of the wastewater conveyed to the anaerobic tank 5 by the adjusting tank 3, so that the quality and the flow of the wastewater are kept in a relatively stable state in a subsequent process treatment section. The anaerobic tank 5 is filled with biological filler 13, the anaerobic biological treatment method is an organic wastewater treatment method which utilizes facultative anaerobes and obligate anaerobes to degrade macromolecular organic matters in the sewage into low molecular compounds and further convert the low molecular compounds into methane and carbon dioxide, and the treatment method is divided into two stages of acid digestion and alkaline digestion. Acid digestion stage: the exoenzyme secreted by acid-producing bacteria acts to change macromolecular organic substances into simple organic acids, alcohols, aldehyde ammonia, carbon dioxide and the like; alkaline digestion stage: the metabolites of acidic digestion are further decomposed into stable structural substances such as methane, carbon dioxide and the like under the action of methane bacteria.
The utility model A 2 the/O process is characterized in that the front A1 anaerobic section, the A2 anoxic section and the rear aerobic basic oxidation section are communicated with water through a water return and passing system device to serve as a biological phosphorus release process function. The aerobic phosphorus accumulation micro-substance which flows back from the aerobic MBBR tank 7 is subjected to energy metabolism to release phosphorus in an anaerobic state, the more the phosphorus accumulation micro-substance releases phosphorus in the process section, the greater the phosphorus adsorption and synthesis amount of the phosphorus accumulation micro-substance in the aerobic MBBR tank 7 is, the lower the content of soluble phosphorus elements in the sewage is, and the phosphorus in the sewage can be removed by quantitatively discharging activated sludge.
The anaerobic tank 5 is connected with the anaerobic tank through a pipelineAn anoxic tank 6 is connected, a submersible stirrer 14 is arranged in the anoxic tank 6, and sewage inflow and aerobic nitrification liquid are refluxed and uniformly mixed through the submersible stirrer 14 so as to improve the denitrification rate. And the inside of the anoxic tank 6 is also filled with a suspended filler 15, and the anoxic tank 6 is connected with an aerobic MBBR tank 7. Heterotrophic bacteria hydrolyze suspended pollutants and soluble organic matters in the sewage into organic acid at an anoxic section, so that macromolecular organic matters are decomposed into micromolecular organic matters, insoluble organic matters are converted into soluble organic matters, and when products after anoxic hydrolysis enter an aerobic MBBR tank 7 for aerobic treatment, the biodegradability and the oxygen efficiency of the sewage can be improved; in the hydrolytic acidification anoxic section, heterotrophic bacteria ammonify pollutants such as protein and fat to free ammonia, and under the condition of sufficient oxygen supply, the nitrification of autotrophic bacteria makes NH 3 Oxidation of-N to NO 3 - Controlled to return to the anoxic tank 6 by a reflux pump 17, under the anoxic condition, the denitrification of the heterotrophic bacteria can lead NO to be generated 3 - Reducing the nitrogen into molecular nitrogen to complete the ecological cycle of C, N, O and realize the biochemical treatment of sewage.
The aerobic MBBR tank 7 is connected with a blower 16, wherein the blower is a rotary blower. The blower 16 is used for oxygenating the mixed liquor in the aerobic MBBR tank 7 so as to maintain the aerobic environment in the aerobic MBBR tank 7; meanwhile, air is blown into the contact oxidation tank to form air stripping, so that the stirring and mixing effects are brought, the contact frequency of water inflow pollution and the biological membrane is accelerated, and the pollutant decomposition efficiency is improved. The aerobic MBBR tank 7 is internally provided with a reflux pump 17 and a suspended filler 15. The carrier of the aerobic MBBR tank 7 is polyethylene suspended filler 15 with the density of 0.95g/cm 3 The porosity is 88 percent, and the specific surface area for attaching the biological membrane is about 400-800m 2 /m 3 Can provide good growth environment for microorganisms; the filling rate can reach 67 percent, and the biological contact material can be stirred by air under the aerobic operation or by machinery under the facultative/anaerobic operation to enable the biological contact material to uniformly suspend and flow in water. The special shape of the carrier ensures that microorganisms grow on the inner surface of the protected carrier, are not easy to run off and are easy to enrich. The collision and shearing action of the carrier in water makes air bubbles finer, and the utilization rate of oxygen is increased. In addition, each carrier is internally and externally provided withDifferent biological species exist, anaerobic bacteria or facultative bacteria grow inside the reactor, and aerobic bacteria grow outside the reactor, so that each carrier is a micro reactor, nitrification reaction and denitrification reaction exist simultaneously, and the treatment effect is improved. The biological contact oxidation method of the MBBR has the advantages that the filler biomembranes are respectively anaerobic, facultative and aerobic from inside to outside, the nitrification and denitrification in the same pool can be realized, the number of structures is reduced, and the investment cost is saved; the system also has the advantages of strong tolerance to impact load and water quality change, stable operation, high volume load, small occupied area, lower construction cost, lower sludge yield, no need of sludge backflow and simple operation management.
The aerobic MBBR tank 7 is connected with an inclined tube sedimentation tank 8 through a pipeline, the inclined tube sedimentation tank 8 is used for settling sludge, and an inclined tube filler 19 is filled in the inclined tube sedimentation tank 8. Each inclined tube is equivalent to a small sedimentation tank, the N small sedimentation tanks form an inclined tube sedimentation tank 8, the diameter of each inclined tube is relatively small, the sedimentation radius of suspended matters is small, the clarification and separation time is greatly shortened, the clarification and separation efficiency is improved, and the operation is more stable. The inclined tube sedimentation tank 8 is provided with a phosphorus removing agent adding device 18, and the phosphorus removing agent adding device 18 is used for adding a phosphorus removing agent into the inclined tube sedimentation tank 8 to perform chemical precipitation reaction with phosphate radicals in water, so that phosphate precipitates and biological sludge form coprecipitation, and the purpose of chemical precipitation and phosphorus removal is achieved. The phosphorus removal by precipitation has the advantages of good effect and stability.
The inclined tube sedimentation tank 8 is connected with an ultraviolet sterilizer 9 through a pipeline, the inclined tube sedimentation tank 8 is also connected with the drying tank 4 through a pipeline, an electric butterfly valve 20 is arranged between the inclined tube sedimentation tank 8 and the drying tank 4, and the electric butterfly valve 20 is used for controlling the discharge of muddy water generated in the sewage treatment process. The sludge treated by the inclined tube sedimentation tank 8 enters a drying tank 4 for water filtration and natural evaporation drying treatment, and the drying tank 4 is connected with the adjusting tank 3, so that the filtrate treated by the drying tank 4 flows back to the adjusting tank 3 again for treatment; the supernatant after precipitation enters an ultraviolet sterilizer 9 through a pipeline for sterilization treatment. After the pollution indexes of the wastewater treated by the regulating tank 3, the anaerobic secondary and anoxic tank 6, the aerobic MBBR tank 7 and the inclined tube sedimentation tank 8 basically reach the standard, the wastewater can be safely discharged or recycled after being disinfected due to bacteria and virus factors contained in the water, and finally discharged water can be discharged after being disinfected by the ultraviolet disinfector 9. The sterilization by ultraviolet irradiation has the advantages of good effect, economy and no secondary pollutant generated in the sterilization process. The sludge cake in the drying tank 4 is used for plant greening or handling by an outsourced municipal refuse disposal plant.
The working process comprises the following steps: sewage enters a grit chamber 2 through a sewage inlet pipe 1, enters an adjusting tank 3 after large-particle impurities, garbage impurities and silt are removed in the grit chamber 2, is subjected to water quantity and water quality adjustment in the adjusting tank 3, enters an anaerobic tank 5 with uniform water quality and water quantity, is subjected to phosphorus removal through activated sludge in the anaerobic tank 5, sequentially enters an anoxic tank 6 and an aerobic MBBR tank 7, and flows back to the anoxic tank 6 in the aerobic MBBR tank 7 to complete biochemical treatment of the sewage; then the sludge enters an inclined tube sedimentation tank 8 to finish the coprecipitation of phosphate sediment and biological sludge, the precipitated sludge enters a drying tank 4 to be filtered, naturally evaporated and dried, and the dried filtrate returns to a regulating tank 3 again; the supernatant after precipitation is discharged after the disinfection and sterilization of the supernatant by the ultraviolet disinfector 9 through a pipeline.
While the present invention has been described in detail and with reference to the accompanying drawings, it is not to be considered as limited to the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (9)
1. The utility model provides a domestic sewage treatment system which characterized in that: comprises a sewage inlet pipe and a grit chamber connected with the sewage inlet pipe;
the grit chamber is connected with equalizing basin and mummification pond respectively, the equalizing basin is connected with the anaerobism pond to the equalizing basin is connected with the mummification pond, the anaerobism pond is connected with the oxygen deficiency pond, the oxygen deficiency pond is connected with good oxygen MBBR pond, good oxygen MBBR pond is connected with the pipe chute sedimentation tank, the pipe chute sedimentation tank is connected with ultraviolet disinfector to the pipe chute sedimentation tank is connected with the mummification pond.
2. The domestic sewage treatment system of claim 1, wherein: and a grid net is arranged in the grit chamber.
3. The domestic sewage treatment system of claim 1, wherein: and a lifting pump is arranged inside the regulating reservoir.
4. A domestic sewage treatment system according to claim 3 wherein: and a flow meter is arranged between the regulating tank and the anaerobic tank.
5. The domestic sewage treatment system of claim 1, wherein: the inside of the anaerobic tank is filled with biological filler.
6. The domestic sewage treatment system of claim 1 wherein: the anaerobic tank is internally provided with a submersible mixer, and the anaerobic tank and the aerobic MBBR tank are both filled with suspended fillers.
7. The domestic sewage treatment system of claim 6, wherein: the aerobic MBBR tank is connected with an air blower, and a reflux pump is arranged in the aerobic MBBR tank.
8. The domestic sewage treatment system of claim 1 wherein: the inclined tube sedimentation tank is provided with a phosphorus removal agent adding device, and inclined tube filler is filled in the inclined tube sedimentation tank.
9. The domestic sewage treatment system of claim 8, wherein: an electric butterfly valve is arranged between the inclined tube sedimentation tank and the drying tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221045716.XU CN217535745U (en) | 2022-04-28 | 2022-04-28 | Domestic sewage treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221045716.XU CN217535745U (en) | 2022-04-28 | 2022-04-28 | Domestic sewage treatment system |
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| Publication Number | Publication Date |
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| CN217535745U true CN217535745U (en) | 2022-10-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221045716.XU Active CN217535745U (en) | 2022-04-28 | 2022-04-28 | Domestic sewage treatment system |
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| CN (1) | CN217535745U (en) |
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- 2022-04-28 CN CN202221045716.XU patent/CN217535745U/en active Active
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