CN113929267A - Efficient microbial microfiltration clarified sewage treatment device and treatment method thereof - Google Patents
Efficient microbial microfiltration clarified sewage treatment device and treatment method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/485—Sulfur compounds containing only one sulfur compound other than sulfur oxides or hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
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- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C02F3/286—Anaerobic digestion processes including two or more steps
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- C02F3/30—Aerobic and anaerobic processes
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Abstract
The invention relates to the technical field of sewage treatment, in particular to a high-efficiency microorganism microfiltration clarified sewage treatment device which comprises a water distribution well, a grid water collecting tank, a grit chamber, a floating oil tank, a regulating tank, an anaerobic tank, an anoxic tank, a contact oxidation tank, a high-efficiency microorganism aeration biological tank, a reaction tank, a high-efficiency phosphorus removal tank, a sludge tank, a clean water tank, an ultraviolet disinfection discharge tank, a blower, a high-efficiency microorganism filter tank, a biological deodorization device, a stacked spiral filter press and a dosing device, and also relates to a method of the high-efficiency microorganism microfiltration clarified sewage treatment device, which comprises the following steps: step one, pretreatment; step two, improving AAO process treatment; step three, treating the wastewater in a high-efficiency micro-aeration biological tank; step four, efficiently removing phosphorus; and step five, high-efficiency filtering. The invention achieves the purpose of improving the treatment quality and efficiency of domestic sewage, can effectively remove organic matters, ammonia nitrogen, phosphorus and the like in the sewage, purifies the effluent, can reduce the treatment cost and meets the process requirements.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a high-efficiency microorganism microfiltration clarified sewage treatment device and a treatment method thereof.
Background
Sewage treatment is a process of purifying sewage to meet the water quality requirement of discharging the sewage into a certain water body or reusing the sewage. Sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and is increasingly used in daily life of common people.
Compared with other sewage, the domestic sewage discharged by a user has stronger self characteristics, mainly reflects in directness and randomness, further causes the sewage quantity to have larger fluctuation, has larger change coefficient of the sewage quantity, and simultaneously has the following characteristics: phosphorus and ammonia nitrogen are high, the content of other pollutants such as hydrocarbon, microorganisms, inorganic salt and the like is close to that of domestic sewage, so that the treatment process cannot meet the standard requirement, the content of the pollutants in the treated sewage does not meet the standard, and meanwhile, the sewage treatment cost is high, and the process requirement cannot be met.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a high-efficiency microbial microfiltration clarified sewage treatment device and a treatment method thereof, which achieve the aim of improving the treatment quality and efficiency of domestic sewage, can effectively remove organic matters, ammonia nitrogen, phosphorus and the like in the sewage, purify the effluent, reduce the treatment cost and meet the process requirements.
(II) technical scheme
In order to realize the technical problem, the invention provides the following technical scheme: a high-efficiency microorganism microfiltration clarified sewage treatment device comprises a water distribution well, a grid water collecting tank, a grit chamber, a floating oil tank, an adjusting tank, an anaerobic tank, an anoxic tank, a contact oxidation tank, a high-efficiency micro-aeration biological tank, a reaction tank, a high-efficiency dephosphorization tank, a sludge tank, a clean water tank, an ultraviolet disinfection discharge tank, a blower, a high-efficiency micro-filter tank, a biological deodorization device, a stacked spiral filter press and a dosing device, wherein the liquid outlet end of the water distribution well is fixedly communicated with the liquid inlet end of the grid water collecting tank, the liquid outlet end of the grid water collecting tank is communicated with the grit chamber, the liquid outlet end of the supernatant of the grit chamber is fixedly communicated with a floating oil tank, the liquid outlet end of the floating oil tank is fixedly communicated with the adjusting tank, the liquid outlet end of the adjusting tank is fixedly communicated with the anaerobic tank, the anaerobic tank is fixedly communicated with the anoxic tank, the anoxic tank is fixedly communicated with the contact oxidation tank, the liquid outlet end of the contact oxidation tank is fixedly communicated with the high-efficiency micro-aeration biological tank, the high-efficient little aeration biological pond inserts the retort, the play liquid end on retort right side is gone into high-efficient dephosphorization pond, the high-efficient little filtering pond is gone into to the right side in high-efficient dephosphorization pond, the play liquid end in high-efficient little filtering pond is gone into the clean water basin, the play liquid end on clean water basin right side is gone into the ultraviolet disinfection discharge tank and is discharged, the sludge impoundment all is in the intercommunication state with high-efficient dephosphorization pond and clean water basin, the play mud end of sludge impoundment passes through the fixed intercommunication of sludge pump and biological deodorization device, biological deodorization device's play mud end and the fixed intercommunication of spiral shell filter press, the feed end and the fixed intercommunication of charge device of spiral shell filter press.
Further, the inside of grid catch basin is provided with the rotation mechanical grid of thickness for getting rid of great suspended solid, like leaf, weeds, billet and waste plastics, the normal work of protection water pump, the inside of grit chamber is provided with carries the sand pump and is used for the regular clearance of grit, the oil slick that the oil slick inslot portion produced is regularly dragged for by the manual work, the inside of contact oxidation pond sets up the dive agitator pump, be provided with on the high-efficient micro-aeration biological pond and nitrify the liquid reflux pump, the inside in high-efficient dephosphorization pond is provided with the chain formula and scrapes the sediment machine.
Further, all be provided with the aeration pipe on contact oxidation pond and the high-efficient little aeration biological pond, contact oxidation pond and high-efficient little aeration biological pond pass through the aeration pipe and the fixed intercommunication of air-blower, all be provided with waste gas pipe access biological deodorization device on grit chamber, equalizing basin, anaerobism pond, oxygen deficiency pond, contact oxidation pond, high-efficient little aeration biological pond, high-efficient dephosphorization pond and the sludge impoundment, be provided with the dosing pipe of puting in the dephosphorization agent on the retort.
Furthermore, the structural form of the grid pond is a steel concrete underground pond, the size of the grid pond is 3.4 multiplied by 9.0 multiplied by 2.50m, the grid is composed of a coarse grid and a fine grid, the grid pond can intercept fine impurities and particulate matter impurities in sewage, the structural form of the grit chamber is a steel concrete underground pond, sand and other impurities with large specific gravity in the physical separation river surge are 7.2 multiplied by 2.3 multiplied by 2.50m, the height of the grit chamber is 400mm, the effective water depth is 0.7m, the width of the water inlet channel is 0.4m, the depth of the mud bucket is 1m, and the inclination angle of the mud bucket is as follows: 45 °, effective volume: v7.2 × 2.3 × 0.7 11.6m3The residence time is as follows: t11.6 m3 ÷ 125m3/h × 60min/h ═ 5.57min, the maximum flow rate is three river gush pumps full open: v is 241m3/h (0.7m 0.4m) 860m/h is 0.239 m/s.
Further, the structure of equalizing basin is steel concrete underground tank, can adjust waste water yield, homogenization waste water quality, and the size is 15.3 x 8.7 x 4.3m, effective volume: v15.3 × 8.7 × 3.7 × 2+15.3 × 1.3 × 1.8 × 2 1057m3Total residence time: t1057 m3 ÷ 125m3/h ═ 8.46h, the structural form of the anaerobic pool is a steel concrete underground pool, under the action of anaerobic microorganisms, the biodegradability of sewage is improved, the size is 10.0 multiplied by 5.3 multiplied by 4.3m, the effective water depth: 3.6m, total effective volume: v ═ 10 × 3.5 × 3.6 × 2 ═ 252m3The residence time is as follows: t252 m3 ÷ 125m3/h ═ 2.0 h.
Further, the structural form of the anoxic pond is a steel concrete underground pond, under an anoxic condition, organic matters in sewage are degraded by microorganisms, the size is 10.0 multiplied by 5.3 multiplied by 4.3m, and the effective water depth is as follows: 3.6m, total effective volume: v10 × 5.3 × 3.6 × 2 381.6m3Total residence time: t-381.6 m3 ÷ 125m 3/h-3 h.
Further, the structure form of the high-efficiency dephosphorization tank is a steel concrete underground tank, the sludge of the effluent of the aerobic tank is removed, the water quality is clarified, and the phosphorus content and size in the sewage are reduced: 17.3X 5.5X 4.3m, wherein the width of the water distribution zone is 1m, the width of the precipitation zone is 16m, the surface load: 125m30.71 m/h (16m × 5.5m × 2 seats)3V (m2 × h), effective depth: 2.50m, settling time: t ═ 16 mx 5.5 mx 2.5 mx 2 pieces ÷ 125m3/h ═ 3.5 h.
A method for a high-efficiency microorganism microfiltration clarification sewage treatment device comprises the following steps:
step one, pretreatment; step two, improving AAO process treatment; step three, treating the wastewater in a high-efficiency micro-aeration biological tank; step four, efficiently removing phosphorus; step five, high-efficiency filtration; discharging the clean water tank; step seven, sludge concentration; step eight, sludge press filtration; step nine, odor treatment;
in the first step, a water inlet channel and a grid pond are built at the edge of a river surge close to a station site, the water inlet channel and the grid pond are lifted by a grid pond lifting pump to enter a water distribution well of a sewage station, then automatically flow into a mechanical fine grid to remove part of suspended matters, automatically flow into a grit chamber to separate gravels caused by the river surge, floating oil on the upper part of the grit chamber is periodically and manually fished to a floating oil tank, the effluent of the grit chamber automatically flows into an adjusting tank to adjust the water quality and the water quantity in the adjusting tank, and simultaneously fully balance the water quality and the water quantity;
in the second step, the main process adopts an improved AAO process, namely an anaerobic pool + anoxic + aerobic process;
the biological contact oxidation tank is a key process for treating domestic sewage and is one of keys for judging whether treated effluent reaches the standard or not, the biological contact oxidation tank is filled with elastic biological filler, a large number of aerobic microorganisms grow on the filler to form a microbial film, and under the action of the aerobic microorganisms, organic matters (namely COD and BOD), animal and vegetable oil, ammonia nitrogen, phosphorus and the like in the sewage are decomposed and utilized by the microorganisms as nutrient substances to synthesize substances of the microorganisms or are decomposed into carbon dioxide, water and nitrogen;
thereby removing organic matters (namely COD and BOD), ammonia nitrogen, phosphorus and the like in the sewage, purifying the effluent, continuously aging and falling the microbial film on the filling material in the tank, simultaneously continuously growing a new microbial film, and providing oxygen required by metabolism of aerobic microorganisms by the submersible aerator;
in the third step, the domestic sewage enters the high-efficiency micro-aeration biological tank after biochemical treatment, and aeration is carried out in the micro-aeration biological tank, so that the content of pollutants in the sewage is further reduced;
in the fourth step, the effluent of the high-efficiency micro-aeration biological tank enters the high-efficiency phosphorus removal tank, the high-efficiency phosphorus removal tank is one of the key processes of sewage treatment, the quality of the effect directly influences whether the concentration of suspended matters of the final effluent reaches the standard or not, and part of the effluent of the high-efficiency micro-aeration biological tank flows back to the anoxic tank to perform nitrogen and phosphorus removal to form internal reflux;
in the fifth step, the sewage after biological treatment enters the high-efficiency micro-filter, and as the aged microbial membrane in the biological contact oxidation tank falls into the water to form granular suspended matters, the effluent of the contact oxidation tank needs to be subjected to solid-liquid separation treatment, the specific gravity of the suspended matters is slightly larger than that of the water, the gravity separation is carried out in a sedimentation tank, the suspended matters are precipitated and collected in a bottom sludge hopper, and the clear water after precipitation and clarification enters the high-efficiency micro-filter;
in the sixth step, the effluent of the high-efficiency phosphorus removal tank enters cloth filter equipment for treatment to further remove suspended matters, the effluent flows to a clean water tank, and the clean water is lifted by a lift pump to a discharge tank and flows back to an electric drainage station;
the filter has the advantages of stable quality of outlet water, low operation cost, automatic control through a PLC and the like, further removes suspended impurities in water to ensure the passing-off treatment of discharged sewage, regularly performs backwashing after saturated filtration, and performs backwashing on a regulating tank for retreatment;
in the seventh step, discharging a part of the sludge separated from the high-efficiency phosphorus removal tank into a sludge concentration tank for concentration, and refluxing a part of the sludge to the anaerobic section for denitrification;
in the step eight, the process adopts the biochemical treatment and the treatment process of a secondary sedimentation tank, so that sludge can be generated, a sludge dewatering machine is arranged for dewatering, and the mud cakes after filter pressing are transported outwards;
in the ninth step, the sewage treatment system and the sludge treatment system can generate certain odor in the operation process of the sewage treatment station, the main odor sources are main odor sources in a grid pump station pool, an adjusting pool, a sludge concentration pool and the like, main odor substances are ammonia, hydrogen sulfide and methyl mercaptan, the main odor substances are collected through a collecting pipeline and conveyed to a biological deodorization device by a fan, and the odor substances are decomposed into CO2 and other odorless inorganic substances by the biological deodorization device, so that the odor is removed.
(III) advantageous effects
The invention provides a high-efficiency microorganism microfiltration clarified sewage treatment device and a treatment method thereof, and the device has the following beneficial effects:
1. the invention adopts the treatment process which takes the improved AAO process, the high-efficiency micro-aeration biological tank, the high-efficiency phosphorus removal tank and the high-efficiency micro-filter tank as main bodies, sewage is lifted by a lifting pump station and enters a sewage treatment station, the biological contact oxidation tank is provided with elastic biological fillers, a large number of aerobic microorganisms grow on the fillers to form a microbial film, under the action of the aerobic microorganisms, organic matters (namely COD and BOD), animal and vegetable oil, ammonia nitrogen, phosphorus and the like in the sewage are decomposed and utilized by the microorganisms as nutrient substances, and the substances of the microorganisms are synthesized or decomposed into carbon dioxide, water and nitrogen, so that the organic matters (namely COD and BOD), ammonia nitrogen, phosphorus and the like in the sewage are removed, the aim of improving the treatment quality and efficiency of domestic sewage is achieved, and the effluent is effectively purified.
2. The sewage after biological treatment enters the high-efficiency micro-filter, and an aged microbial membrane in the biological contact oxidation tank falls into the water to form granular suspended matters, so that the effluent of the contact oxidation tank needs to be subjected to solid-liquid separation treatment, the specific gravity of the suspended matters is slightly greater than that of the water, the suspended matters are subjected to gravity separation in the sedimentation tank, are precipitated and collected in a bottom sludge hopper, and clear water after precipitation and clarification enters the high-efficiency micro-filter, so that impurities in the sewage can be effectively removed, and the treatment efficiency is improved.
3. The invention adjusts the water quality and the water quantity in the adjusting tank, fully balances the water quality and the water quantity at the same time, moreover, the quality of various domestic sewage is different, the concentration of the domestic sewage discharged at different time is different, and the domestic sewage passes through the regulating tank, can mix various domestic sewage and sewage discharged at different time, has the function of uniform water quality, constant water quality, is beneficial to treatment, and the sewage contains more inorganic and organic particles with the specific gravity slightly larger than that of the water, suspended matters and the like, and part of the substances can be precipitated in the regulating tank to form sludge, so that the sludge can be conveniently subjected to primary treatment, the sludge treatment cost is reduced, because the microorganism is completely intercepted in the bioreactor, the interception and growth of the microorganism with slow proliferation such as nitrobacteria are facilitated, the system nitrification efficiency is improved, and the degradation efficiency of the organic matters which are difficult to degrade is facilitated.
4. The process realizes the complete separation of Hydraulic Retention Time (HRT) and Sludge Retention Time (SRT), has more flexible and stable operation control, is a new technology for easily realizing equipment in sewage treatment, and can realize automatic control of a microcomputer, thereby leading the operation and the management to be easy and convenient.
5. The process can be used as an advanced treatment unit of the traditional sewage treatment process, has wide application prospect in the fields of advanced treatment of the effluent of an urban secondary sewage treatment plant and the like, and further realizes the large-scale recycling of urban sewage.
Drawings
FIG. 1 is a schematic view of the structure of a sewage treatment apparatus according to the present invention;
FIG. 2 is a block diagram of the process for wastewater treatment according to the present invention.
In the figure: 1. distributing a water well; 2. a grid catch basin; 3. a grit chamber; 4. a floating oil tank; 5. a regulating tank; 6. an anaerobic tank; 7. an anoxic tank; 8. a contact oxidation pond; 9. a high-efficiency micro-aeration biological tank; 10. a reaction tank; 11. a high-efficiency dephosphorization pool; 12. a sludge tank; 13. a clean water tank; 14. an ultraviolet disinfection discharge tank; 15. a blower; 16. a high-efficiency micro-filter; 17. a biological deodorization device; 18. a stack screw filter press; 19. a medicine adding device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a high-efficiency microorganism microfiltration clarification sewage treatment device comprises a water distribution well 1, a grid water collecting tank 2, a grit chamber 3, a floating oil tank 4, an adjusting tank 5, an anaerobic tank 6, an anoxic tank 7, a contact oxidation tank 8, a high-efficiency micro-aeration biological tank 9, a reaction tank 10, a high-efficiency dephosphorization tank 11, a sludge tank 12, a clean water tank 13, an ultraviolet disinfection discharge tank 14, an air blower 15, a high-efficiency micro-filter tank 16, a biological deodorization device 17, a stacked spiral filter press 18 and a dosing device 19, wherein the liquid outlet end of the water distribution well 1 is fixedly communicated with the liquid inlet end of the grid water collecting tank 2, the liquid outlet end of the grid water collecting tank 2 is communicated with the grit chamber 3, the liquid outlet end of the grit chamber 3 is fixedly communicated with the floating oil tank 4, the liquid outlet end of the floating oil tank 4 is fixedly communicated with the adjusting tank 5, the liquid outlet end of the adjusting tank 5 is fixedly communicated with the anaerobic tank 6, the anaerobic tank 6 is fixedly communicated with the anoxic tank 7, the anoxic tank 7 is fixedly communicated with the contact oxidation tank 8, the liquid outlet end of a contact oxidation pond 8 is fixedly communicated with a high-efficiency micro-aeration biological pond 9, the high-efficiency micro-aeration biological pond 9 is connected into a reaction tank 10, the liquid outlet end on the right side of the reaction tank 10 is connected into a high-efficiency phosphorus removal pond 11, the right side of the high-efficiency phosphorus removal pond 11 is connected into a high-efficiency micro-filtration pond 16, the liquid outlet end of the high-efficiency micro-filtration pond 16 is connected into a clear water pond 13, the liquid outlet end on the right side of the clear water pond 13 is connected into an ultraviolet disinfection discharge tank 14 for discharging, a sludge pond 12, the high-efficiency phosphorus removal pond 11 and the clear water pond 13 are both in a communicated state, the sludge outlet end of the sludge pond 12 is fixedly communicated with a biological deodorization device 17 through a sludge pump, the sludge outlet end of the biological deodorization device 17 is fixedly communicated with a laminated spiral shell filter press 18, the feed end of the laminated spiral shell filter press 18 is fixedly communicated with a chemical adding device 19, through a treatment process which adopts an improved AAO process, the high-efficiency micro-aeration biological pond, the high-efficiency phosphorus removal pond and the high-efficiency micro-filtration pond as main bodies, sewage enters a sewage treatment station through a lifting pump station, the biological contact oxidation pond is equipped with the elastic biological filler, grow a large amount of aerobic microorganisms on the filler, form the microbial film, under the effect of aerobic microorganisms, organic matter (being COD and BOD) in the sewage, animal and vegetable oil, ammonia nitrogen, phosphorus etc. are decomposed, utilized as nutrient substance by the microorganism, synthesize the material of microorganism self or be decomposed into carbon dioxide and water, nitrogen gas, thereby organic matter (being COD and BOD) in the sewage have been got rid of, ammonia nitrogen, phosphorus etc. make it purify to go out water, the microbial film on the pond filler constantly ages and drops, new microbial film constantly grows simultaneously, guarantee sewage treatment high efficiency and quality.
The inside of the grating collecting tank 2 is provided with a coarse and fine rotary mechanical grating for removing larger suspended matters such as leaves, weeds, wood blocks and waste plastics, protecting the normal work of a water pump, the inside of the grit chamber 3 is provided with a sand pump for regularly cleaning grit, floating oil generated inside the floating oil tank 4 is periodically fished up by manpower, the inside of the contact oxidation tank 8 is provided with a submersible stirring pump, the high-efficiency micro-aeration biological tank 9 is provided with a nitrifying liquid reflux pump, the inside of the high-efficiency dephosphorization tank 11 is provided with a chain type slag scraper, the contact oxidation tank 8 and the high-efficiency micro-aeration biological tank 9 are both provided with aeration pipes, the contact oxidation tank 8 and the high-efficiency micro-aeration biological tank 9 are fixedly communicated with an air blower 15 through the aeration pipes, the grit chamber 3, the regulating tank 5, the anaerobic tank 6, the anoxic tank 7, the contact oxidation tank 8, the high-efficiency micro-aeration biological tank 9, the high-efficiency dephosphorization tank 11 and the sludge tank 12 are both provided with a waste gas pipe access biological removing device 17, the reaction tank 10 is provided with a dosing pipe for putting in a phosphorus removing agent, and the sewage after biological treatment enters the high-efficiency micro-filter, and an aged microbial membrane in the biological contact oxidation tank drops into the water to form granular suspended matters, so that the effluent of the contact oxidation tank needs to be subjected to solid-liquid separation treatment, the specific gravity of the suspended matters is slightly larger than that of the water, the suspended matters are subjected to gravity separation in a sedimentation tank, the suspended matters are precipitated and collected in a bottom sludge hopper, and clear water after precipitation and clarification enters the high-efficiency micro-filter, so that impurities in the sewage can be effectively removed, and the treatment efficiency is improved.
The structural form of grid pond 2 is steel concrete underground pool, and the size is 3.4X 9.0X 2.50m, and the grid comprises thick grid and thin grid, can intercept finer impurity and particulate matter impurity in the sewage, and the structural form of grit chamber 3 is steel concrete underground pool, and the great impurity of proportion such as grit that comes in the physics separation river gush, and the size is 7.2X 2.3X 2.50m, and the superelevation is 400mm, effective depth of water 0.7m, the canal width of intaking 0.4m, the mud fill degree of depth 1m, the mud fill inclination: 45 °, effective volume: v7.2 × 2.3 × 0.7 11.6m3The residence time is as follows: t11.6 m3 ÷ 125m3/h multiplied by 60min/h is 5.57min, the maximum flow rate is that three river surge water pumps are fully opened: v is 241m 3/h/0.7 m 0.4m 860m/h 0.239m/s, the structure of the adjusting tank 5 is a steel concrete underground tank which can adjust the quantity of wastewater and homogenize the quality of wastewater, the size is 15.3X 8.7X 4.3m, the effective volume: v15.3 × 8.7 × 3.7 × 2+15.3 × 1.3 × 1.8 × 2 1057m3Total residence time: t1057 m3 ÷ 125m3/h ═ 8.46h, the structural form of the anaerobic pool 6 is a steel concrete underground pool, under the action of anaerobic microorganisms, the biodegradability of sewage is improved, the size is 10.0 multiplied by 5.3 multiplied by 4.3m, the effective water depth: 3.6m, total effective volume: v ═ 10 × 3.5 × 3.6 × 2 ═ 252m3The residence time is as follows: t252 m3 ÷ 125m3/h ═ 2.0h, the structural form of the anoxic pond 7 is a steel concrete underground pond, under the anoxic condition, the organic matters in the sewage are degraded by microorganisms, the size is 10.0 multiplied by 5.3 multiplied by 4.3m, the effective water depth: 3.6m, total effective volume: v10 × 5.3 × 3.6 × 2 381.6m3Total residence time: t is 381.6m3 ÷ 125m3/h is 3h, the structure form of the high-efficiency phosphorus removal pool 11 is a steel concrete underground pool, the sludge of the effluent of the aerobic pool is removed, the water quality is clarified, the phosphorus content in the sewage is reduced, and the size: 17.3X 5.5X 4.3m, wherein the width of the water distribution zone is 1m, the width of the precipitation zone is 16m, the surface load: 125m30.71 m/h/16 m × 5.5m × 2 seat3V (m2 × h), effective depth: 2.50m, settling time: t16 m x 5.5m x 2.5m x 2 seat/125 m3/h 3.5h, the invention adjusts the water quality and quantity in the adjusting tank, and fully balances the water quality and quantity, and the quality of various domestic sewage is different, the concentration of the domestic sewage discharged at different time is different, through the adjusting tank, various domestic sewage and sewage discharged at different time can be mixed, the effect of uniform water quality is achieved, the water quality is constant, the treatment is facilitated, and the sewage contains more inorganic and organic particles with a specific gravity slightly larger than that of water, suspended matters and the like, part of the substances can be precipitated in the adjusting tank to form sludge, thereby being convenient for primary treatment of the sludge, reducing the sludge treatment cost, and being beneficial to the interception and growth of slowly proliferating microorganisms such as nitrobacteria because the microorganisms are completely intercepted in the bioreactor, and improving the system nitrification efficiency, is beneficial to improving the degradation efficiency of the organic matters which are difficult to degrade.
A method for a high-efficiency microorganism microfiltration clarification sewage treatment device comprises the following steps:
step one, pretreatment; step two, improving AAO process treatment; step three, treating the wastewater in a high-efficiency micro-aeration biological tank; step four, efficiently removing phosphorus; step five, high-efficiency filtration; discharging the clean water tank; step seven, sludge concentration; step eight, sludge press filtration; step nine, odor treatment;
in the first step, a water inlet channel and a grid pond are built at the edge of a river surge close to a station site, the water inlet channel and the grid pond are lifted by a grid pond lifting pump to enter a water distribution well of a sewage station, then automatically flow into a mechanical fine grid to remove part of suspended matters, automatically flow into a grit chamber to separate gravels caused by the river surge, floating oil on the upper part of the grit chamber is periodically and manually fished to a floating oil tank, the effluent of the grit chamber automatically flows into an adjusting tank to adjust the water quality and the water quantity in the adjusting tank, and simultaneously fully balance the water quality and the water quantity;
the regulating reservoir has three functions: firstly, the water quantity is regulated, in one day, the instantaneous discharge water quantity of sewage is uneven, sometimes more, sometimes less, more in the daytime and less at night, and the treatment capacity of a sewage station is uniform, so that a water tank is required to store sewage, then the sewage is pumped to a subsequent treatment process by a submersible sewage pump, and the volume of a regulating tank is required to ensure enough water quantity regulating capacity;
secondly, the water quality is homogenized, the quality of various domestic sewage is different, the concentration of the domestic sewage discharged at different time is different, the various domestic sewage and the sewage discharged at different time can be mixed through the regulating tank, the effect of homogenizing the water quality is achieved, the water quality is constant, and the treatment is facilitated;
thirdly, the sewage is pre-precipitated, contains more inorganic and organic particles with the specific gravity slightly larger than that of water, suspended matters and the like, and part of the substances are precipitated in the regulating tank to form sludge;
in the second step, the main process adopts an improved AAO process, namely an anaerobic pool + anoxic + aerobic process;
the biological contact oxidation tank is a key process for treating domestic sewage and is one of keys for judging whether treated effluent reaches the standard or not, the biological contact oxidation tank is filled with elastic biological filler, a large number of aerobic microorganisms grow on the filler to form a microbial film, and under the action of the aerobic microorganisms, organic matters (namely COD and BOD), animal and vegetable oil, ammonia nitrogen, phosphorus and the like in the sewage are decomposed and utilized by the microorganisms as nutrient substances to synthesize substances of the microorganisms or are decomposed into carbon dioxide, water and nitrogen;
thereby removing organic matters (namely COD and BOD), ammonia nitrogen, phosphorus and the like in the sewage, purifying the effluent, continuously aging and falling the microbial film on the filling material in the tank, simultaneously continuously growing a new microbial film, and providing oxygen required by metabolism of aerobic microorganisms by the submersible aerator;
in the third step, the domestic sewage enters the high-efficiency micro-aeration biological tank after biochemical treatment, and aeration is carried out in the micro-aeration biological tank, so that the content of pollutants in the sewage is further reduced;
in the fourth step, the effluent of the high-efficiency micro-aeration biological tank enters the high-efficiency phosphorus removal tank, the high-efficiency phosphorus removal tank is one of the key processes of sewage treatment, the quality of the effect directly influences whether the concentration of suspended matters of the final effluent reaches the standard or not, and part of the effluent of the high-efficiency micro-aeration biological tank flows back to the anoxic tank to perform nitrogen and phosphorus removal to form internal reflux;
in the fifth step, the sewage after biological treatment enters the high-efficiency micro-filter, and as the aged microbial membrane in the biological contact oxidation tank falls into the water to form granular suspended matters, the effluent of the contact oxidation tank needs to be subjected to solid-liquid separation treatment, the specific gravity of the suspended matters is slightly larger than that of the water, the gravity separation is carried out in a sedimentation tank, the suspended matters are precipitated and collected in a bottom sludge hopper, and the clear water after precipitation and clarification enters the high-efficiency micro-filter;
in the sixth step, the effluent of the high-efficiency phosphorus removal tank enters cloth filter equipment for treatment to further remove suspended matters, the effluent flows to a clean water tank, and the clean water is lifted by a lift pump to a discharge tank and flows back to an electric drainage station;
the filter has the advantages of stable quality of outlet water, low operation cost, automatic control through a PLC and the like, further removes suspended impurities in water to ensure the passing-off treatment of discharged sewage, regularly performs backwashing after saturated filtration, and performs backwashing on a regulating tank for retreatment;
in the seventh step, discharging a part of the sludge separated from the high-efficiency phosphorus removal tank into a sludge concentration tank for concentration, and refluxing a part of the sludge to the anaerobic section for denitrification;
in the step eight, the process adopts the biochemical treatment and the treatment process of a secondary sedimentation tank, so that sludge can be generated, a sludge dewatering machine is arranged for dewatering, and the mud cakes after filter pressing are transported outwards;
in the ninth step, the sewage treatment system and the sludge treatment system can generate certain odor in the operation process of the sewage treatment station, the main odor sources are main odor sources in a grid pump station pool, an adjusting pool, a sludge concentration pool and the like, main odor substances are ammonia, hydrogen sulfide and methyl mercaptan, the main odor substances are collected through a collecting pipeline and conveyed to a biological deodorization device by a fan, and the odor substances are decomposed into CO2 and other odorless inorganic substances by the biological deodorization device, so that the odor is removed.
The process realizes the complete separation of Hydraulic Retention Time (HRT) and Sludge Retention Time (SRT), has more flexible and stable operation control, is a new technology for easily realizing equipment in sewage treatment, and can realize automatic control of a microcomputer, thereby leading the operation and the management to be easy and convenient.
The process can be used as an advanced treatment unit of the traditional sewage treatment process, has wide application prospect in the fields of advanced treatment of the effluent of an urban secondary sewage treatment plant and the like, and further realizes the large-scale recycling of urban sewage.
Method for removing contaminants
1. Removal of SS
The removal of SS in the sewage mainly depends on the effect of precipitation, inorganic particles and organic particles in the sewage depend on the effect of natural precipitation or depend on the absorption of activated sludge flocs, the network effect, the activated sludge flocs are simultaneously precipitated and removed, the concentration of suspended matters in the sewage tail water not only relates to the indexes of SS of the effluent, indexes such as BOD5, COD, TP and the like in the effluent are also related to the indexes, because the suspended matters mainly consist of the activated sludge flocs, the organic components of the suspended matters are very high, and the higher content of the suspended matters can lead to the increase of BOD5, COD and TP in the water, therefore, the SS index for controlling the sewage tail water is the most basic and also very important.
In order to reduce the concentration of suspended matters in the effluent, appropriate measures are taken in engineering, such as adopting appropriate sludge load to maintain the coagulation and sedimentation performance of activated sludge, adopting smaller surface load of a secondary sedimentation tank, adopting lower effluent weir load, fully utilizing the adsorption network action of an activated sludge suspension layer and the like, and under the conditions of selecting reasonable sewage treatment schemes, proper process parameter values and optimized monomer design, a filter is arranged behind the secondary sedimentation tank, so that the SS index of the tail water can completely meet the effluent requirement.
2. Removal of BOD5
The removal of BOD5 of sewage is accomplished by adsorption and metabolism of microorganisms, then separating sludge from water, the microorganisms in the biological membrane use a part of organic matters in the sewage to synthesize new cells under aerobic condition, and decompose another part of organic matters to obtain energy required by cell synthesis, the final products are stable substances such as CO2 and H2O, during the process of the anabolism and the catabolism, soluble organic matters (easily degradable organic matters such as low molecular organic acid) directly enter the interior of cells to be utilized, while non-soluble organic matters are firstly adsorbed on the surfaces of the microorganisms and then are hydrolyzed by enzyme to enter the interior of the cells to be utilized, therefore, the aerobic metabolism of the microorganisms plays a role in both the soluble organic matters and the non-soluble organic matters of the sewage, and the metabolic products are harmless stable substances, therefore, the residual BOD5 concentration in the treated wastewater can be made low.
3. Removal of COD
The biochemical removal method of the biodegradable organic matters mainly comprises two major types of anaerobic treatment and aerobic treatment, wherein the anaerobic treatment is to carry out hydrolytic acidification treatment on the organic matters in the sewage under the anaerobic condition through anaerobic bacteria, and finally, the organic matters are converted into CH4 and CO2 under the action of methane bacteria; the aerobic treatment is to convert organic matters in the sewage into CO2 and H2O through the respiratory metabolism of bacteria under the aerobic condition by aerobic bacteria, remove the suspended non-biodegradable organic matters mainly by the adsorption of the microorganisms, ensure that the active bacteria have strong adsorption capacity on organic particles and colloid in the sewage, and then remove the organic matters in the sewage through mud-water separation.
4. Nitrogen removal
The conventional secondary treatment process can only effectively remove BOD5, COD and SS, the removal of nitrogen is limited to a certain extent, the removal rate of nitrogen is generally 10-20%, the requirement of the scheme is difficult to achieve, and the biological denitrification is mainly completed through nitrification and denitrification, so that the scheme considers that the mode of refluxing the mixed liquid in the contact oxidation tank to the anoxic tank is adopted, the biological denitrification condition can be created, and the denitrification rate reaches 60-85%.
5. Removal of bacteria
According to the actual measurement data of the same type of sewage, the domestic sewage contains some germs, parasitic ova and the like, so a disinfection process is added behind the sedimentation tank to remove bacteria in the water.
6. Phosphorus removal
The sewage dephosphorization mainly comprises two categories of biological dephosphorization and chemical dephosphorization, wherein the biological dephosphorization is mainly adopted for domestic sewage, and chemical dephosphorization is supplemented if necessary to ensure that the phosphorus concentration of effluent is within the standard.
Examples of the experiments
Quality of inlet water
The design is carried out according to the following water quality: (except for the pH, the units are mg/l)
| Serial number | Basic control items | Standard of merit |
| 1 | Chemical Oxygen Demand (COD) | 80～210 |
| 2 | Biochemical Oxygen Demand (BOD)5) | 30～60 |
| 3 | Suspended Substance (SS) | 80～120 |
| 4 | |
2～5 |
| 5 | Total nitrogen (in N) | 15～35 |
| 6 | Ammonia nitrogen (in N) | 5～25 |
| 7 | Total phosphorus (in terms of P) | 1～3 |
| 8 | Chroma (dilution times)Number) | 80 |
| 9 | |
6～9 |
The effluent quality is designed according to a primary standard A standard in discharge Standard of pollutants for municipal wastewater treatment plants (GB18918-2002), and the following concrete steps are as follows:
first order Standard A Standard, (except for PH, the units are mg/l)
| Serial number | Basic control items | Standard of merit |
| 1 | Chemical Oxygen Demand (COD) | ≤50 |
| 2 | Suspended Substance (SS) | ≤10 |
| 3 | Biochemical Oxygen Demand (BOD)5) | ≤10 |
| 4 | Total nitrogen (in N) | ≤15 |
| 5 | Ammonia nitrogen | ≤5(8) |
| 6 | Total phosphorus (in terms of P) | ≤0.5 |
| 7 | |
6～9 |
Note: the numerical value outside the brackets is the control index when the water temperature is more than 12 ℃, and the numerical value inside the brackets is the control index when the water temperature is less than or equal to 12 ℃.
The invention has the beneficial effects that: the invention adopts the treatment process which takes an improved AAO process, an efficient micro-aeration biological tank, an efficient phosphorus removal tank and an efficient micro-filter tank as main bodies, sewage is lifted by a lifting pump station and enters a sewage treatment station, elastic biological fillers are arranged in a biological contact oxidation tank, a large number of aerobic microorganisms grow on the fillers to form a microbial film, under the action of the aerobic microorganisms, organic matters (namely COD and BOD), animal and vegetable oil, ammonia nitrogen, phosphorus and the like in the sewage are decomposed and utilized by the microorganisms as nutrient substances, and the substances of the microorganisms are synthesized or decomposed into carbon dioxide, water and nitrogen, so that the organic matters (namely COD and BOD), ammonia nitrogen, phosphorus and the like in the sewage are removed, effluent is purified, the microbial film on the fillers in the tank is continuously aged and falls off, and simultaneously, a new microbial film continuously grows, and the high efficiency and the quality of sewage treatment are ensured.
The sewage after biological treatment enters the high-efficiency micro-filter, and an aged microbial membrane in the biological contact oxidation tank falls into the water to form granular suspended matters, so that the effluent of the contact oxidation tank needs to be subjected to solid-liquid separation treatment, the specific gravity of the suspended matters is slightly greater than that of the water, the suspended matters are subjected to gravity separation in the sedimentation tank, are precipitated and collected in a bottom sludge hopper, and clear water after precipitation and clarification enters the high-efficiency micro-filter, so that impurities in the sewage can be effectively removed, and the treatment efficiency is improved.
The invention adjusts the water quality and the water quantity in the adjusting tank, fully balances the water quality and the water quantity, has different water quality of various domestic sewage and different concentrations of the domestic sewage discharged at different time, passes through the adjusting tank, can mix various domestic sewage and sewage discharged at different time, has the function of uniform water quality, constant water quality, is beneficial to treatment, and the sewage contains more inorganic and organic particles with the specific gravity slightly larger than that of the water, suspended matters and the like, and part of the substances can be precipitated in the regulating tank to form sludge, so that the sludge can be conveniently subjected to primary treatment, the sludge treatment cost is reduced, because the microorganism is completely intercepted in the bioreactor, the interception and growth of the microorganism with slow proliferation such as nitrobacteria are facilitated, the system nitrification efficiency is improved, and the degradation efficiency of the organic matters which are difficult to degrade is facilitated.
The process realizes the complete separation of Hydraulic Retention Time (HRT) and Sludge Retention Time (SRT), has more flexible and stable operation control, is a new technology for easily realizing equipment in sewage treatment, and can realize automatic control of a microcomputer, thereby leading the operation and the management to be easy and convenient.
The process can be used as an advanced treatment unit of the traditional sewage treatment process, has wide application prospect in the fields of advanced treatment of the effluent of an urban secondary sewage treatment plant and the like, and further realizes the large-scale recycling of urban sewage.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a high-efficient microorganism microfiltration clarification sewage treatment plant, including distribution well (1), grid catch basin (2), grit chamber (3), superficial oil groove (4), equalizing basin (5), anaerobism pond (6), oxygen deficiency pond (7), contact oxidation pond (8), high-efficient little aeration biological pond (9), retort (10), high-efficient dephosphorization pond (11), sludge impoundment (12), clean water basin (13), ultraviolet disinfection discharge tank (14), air-blower (15), high-efficient little filtering pond (16), biological deodorization device (17), fold spiral shell filter press (18) and charge device (19), its characterized in that: the liquid outlet end of the water distribution well (1) is fixedly communicated with the liquid inlet end of the grid water collecting tank (2), the liquid outlet end of the grid water collecting tank (2) is communicated with the grit chamber (3), the liquid outlet end of the supernatant of the grit chamber (3) is fixedly communicated with the floating oil tank (4), the liquid outlet end of the floating oil tank (4) is fixedly communicated with the regulating tank (5), the liquid outlet end of the regulating tank (5) is fixedly communicated with the anaerobic tank (6), the anaerobic tank (6) is fixedly communicated with the anoxic tank (7), the anoxic tank (7) is fixedly communicated with the contact oxidation tank (8), the liquid outlet end of the contact oxidation tank (8) is fixedly communicated with the efficient micro-aeration biological tank (9), the efficient micro-aeration biological tank (9) is connected into the reaction tank (10), the liquid outlet end on the right side of the reaction tank (10) is connected into the efficient phosphorus removal tank (11), and the right side of the efficient phosphorus removal tank (11) is connected into the efficient micro-filtration tank (16), the play liquid end of high-efficient micro-filter (16) inserts clean water basin (13), play liquid end on clean water basin (13) right side inserts ultraviolet disinfection discharge tank (14) and discharges, sludge impoundment (12) all are in the intercommunication state with high-efficient dephosphorization pond (11) and clean water basin (13), the play mud end of sludge impoundment (12) passes through the fixed intercommunication of sludge pump and biological deodorization device (17), the play mud end of biological deodorization device (17) with fold the fixed intercommunication of spiral shell filter press (18), the feed end and the fixed intercommunication of charge device (19) of folding spiral shell filter press (18).
2. The high efficiency micro-filtration clarified wastewater treatment plant of claim 1, wherein: the inside of grid catch basin (2) is provided with the rotation mechanical grid of thickness for getting rid of great suspended solid, like leaf, weeds, billet and waste plastics, the normal work of protection water pump, the inside of grit chamber (3) is provided with carries the sand pump and is used for the regular clearance of grit, the floating oil of floating oil groove (4) inside production is regularly dragged for by the manual work, the inside of contact oxidation pond (8) sets up the dive agitator pump, be provided with on high-efficient micro-aeration biological pond (9) and nitrify the liquid backwash pump, the inside of high-efficient dephosphorization pond (11) is provided with the chain formula and scrapes the sediment machine.
3. The high efficiency micro-filtration clarified wastewater treatment plant of claim 1, wherein: all be provided with the aeration pipe on contact oxidation pond (8) and high-efficient little aeration biological pond (9), aeration pipe and air-blower (15) fixed intercommunication are passed through in contact oxidation pond (8) and high-efficient little aeration biological pond (9), all be provided with waste gas pipe on grit chamber (3), equalizing basin (5), anaerobism pond (6), oxygen deficiency pond (7), contact oxidation pond (8), high-efficient little aeration biological pond (9), high-efficient dephosphorization pond (11) and sludge impoundment (12) and insert biological deodorization device (17), be provided with the filler pipe of puting in the phosphorus removal agent on retort (10).
4. The high efficiency micro-filtration clarified wastewater treatment plant of claim 1, wherein: the structural form of grid pond (2) is steel concrete underground pool, and the size is 3.4 x 9.0 x 2.50m, and the grid comprises thick grid and thin grid, can block tiny impurity and particulate matter impurity in the sewage, the structural form of grit chamber (3) is steel concrete underground pool, and the great impurity of proportion such as grit that comes in the physics separation river gush, the size is 7.2 x 2.3 x 2.50m, and the superelevation is 400mm, effective depth of water 0.7m, and the canal width of intaking is 0.4m, and the mud fill degree of depth is 1m, and the mud fill inclination: 45 °, effective volume: v7.2 × 2.3 × 0.7 11.6m3The residence time is as follows: t11.6 m3 ÷ 125m3/h × 60min/h ═ 5.57min, the maximum flow rate is three river gush pumps full open: v is 241m3/h (0.7m 0.4m) 860m/h is 0.239 m/s.
5. The high efficiency micro-filtration clarified wastewater treatment plant of claim 1, wherein: the structure of equalizing basin (5) is steel concrete underground tank, can adjust waste water yield, homogenization waste water quality, and the size is 15.3 x 8.7 x 4.3m, effective volume: v15.3 × 8.7 × 3.7 × 2+15.3 × 1.3 × 1.8 × 2 1057m3Total residence time: t1057 m3 ÷ 125m3/h ═ 8.46h, the structural form of the anaerobic pool (6) is a steel concrete underground pool, under the action of anaerobic microorganisms, the biodegradability of sewage is improved, the size is 10.0 x 5.3 x 4.3m, the effective water depth: 3.6m, total effective volume: v ═ 10 × 3.5 × 3.6 × 2 ═ 252m3The residence time is as follows: t252 m3 ÷ 125m3/h ═ 2.0 h.
6. The high efficiency micro-filtration clarified wastewater treatment plant of claim 1, wherein: the structural form of the anoxic pond (7) is a steel concrete underground pond, under the anoxic condition, organic matters in sewage are degraded by microorganisms, the size is 10.0 multiplied by 5.3 multiplied by 4.3m, the effective water depth is as follows: 3.6m, total effective volume: v10 × 5.3 × 3.6 × 2 381.6m3Total residence time: t-381.6 m3 ÷ 125m 3/h-3 h.
7. The high efficiency micro-filtration clarified wastewater treatment plant of claim 1, wherein: the structure form of the high-efficiency dephosphorization tank (11) is a steel concrete underground tank, and the sludge in the effluent of the aerobic tank is removed to clarify the water quality and reduce the phosphorus content and size in the sewage: 17.3X 5.5X 4.3m, wherein the width of the water distribution zone is 1m, the width of the precipitation zone is 16m, the surface load: 125m30.71 m/h (16m × 5.5m × 2 seats)3V (m2 × h), effective depth: 2.50m, settling time: t ═ 16 mx 5.5 mx 2.5 mx 2 pieces ÷ 125m3/h ═ 3.5 h.
8. A method for a high-efficiency microorganism microfiltration clarification sewage treatment device is characterized by comprising the following steps:
step one, pretreatment; step two, improving AAO process treatment; step three, treating the wastewater in a high-efficiency micro-aeration biological tank; step four, efficiently removing phosphorus; step five, high-efficiency filtration; discharging the clean water tank; step seven, sludge concentration; step eight, sludge press filtration; step nine, odor treatment;
in the first step, a water inlet channel and a grid pond are built at the edge of a river surge close to a station site, the water inlet channel and the grid pond are lifted by a grid pond lifting pump to enter a water distribution well of a sewage station, then automatically flow into a mechanical fine grid to remove part of suspended matters, automatically flow into a grit chamber to separate gravels caused by the river surge, floating oil on the upper part of the grit chamber is periodically and manually fished to a floating oil tank, the effluent of the grit chamber automatically flows into an adjusting tank to adjust the water quality and the water quantity in the adjusting tank, and simultaneously fully balance the water quality and the water quantity;
in the second step, the main process adopts an improved AAO process, namely an anaerobic pool + anoxic + aerobic process;
the biological contact oxidation tank is a key process for treating domestic sewage and is one of keys for judging whether treated effluent reaches the standard or not, the biological contact oxidation tank is filled with elastic biological filler, a large number of aerobic microorganisms grow on the filler to form a microbial film, and under the action of the aerobic microorganisms, organic matters (namely COD and BOD), animal and vegetable oil, ammonia nitrogen, phosphorus and the like in the sewage are decomposed and utilized by the microorganisms as nutrient substances to synthesize substances of the microorganisms or are decomposed into carbon dioxide, water and nitrogen;
thereby removing organic matters (namely COD and BOD), ammonia nitrogen, phosphorus and the like in the sewage, purifying the effluent, continuously aging and falling the microbial film on the filling material in the tank, simultaneously continuously growing a new microbial film, and providing oxygen required by metabolism of aerobic microorganisms by the submersible aerator;
in the third step, the domestic sewage enters the high-efficiency micro-aeration biological tank after biochemical treatment, and aeration is carried out in the micro-aeration biological tank, so that the content of pollutants in the sewage is further reduced;
in the fourth step, the effluent of the high-efficiency micro-aeration biological tank enters the high-efficiency phosphorus removal tank, the high-efficiency phosphorus removal tank is one of the key processes of sewage treatment, the quality of the effect directly influences whether the concentration of suspended matters of the final effluent reaches the standard or not, and part of the effluent of the high-efficiency micro-aeration biological tank flows back to the anoxic tank to perform nitrogen and phosphorus removal to form internal reflux;
in the fifth step, the sewage after biological treatment enters the high-efficiency micro-filter, and as the aged microbial membrane in the biological contact oxidation tank falls into the water to form granular suspended matters, the effluent of the contact oxidation tank needs to be subjected to solid-liquid separation treatment, the specific gravity of the suspended matters is slightly larger than that of the water, the gravity separation is carried out in a sedimentation tank, the suspended matters are precipitated and collected in a bottom sludge hopper, and the clear water after precipitation and clarification enters the high-efficiency micro-filter;
in the sixth step, the effluent of the high-efficiency phosphorus removal tank enters cloth filter equipment for treatment to further remove suspended matters, the effluent flows to a clean water tank, and the clean water is lifted by a lift pump to a discharge tank and flows back to an electric drainage station;
the filter has the advantages of stable quality of outlet water, low operation cost, automatic control through a PLC and the like, further removes suspended impurities in water to ensure the passing-off treatment of discharged sewage, regularly performs backwashing after saturated filtration, and performs backwashing on a regulating tank for retreatment;
in the seventh step, discharging a part of the sludge separated from the high-efficiency phosphorus removal tank into a sludge concentration tank for concentration, and refluxing a part of the sludge to the anaerobic section for denitrification;
in the step eight, the process adopts the biochemical treatment and the treatment process of a secondary sedimentation tank, so that sludge can be generated, a sludge dewatering machine is arranged for dewatering, and the mud cakes after filter pressing are transported outwards;
in the ninth step, the sewage treatment system and the sludge treatment system can generate certain odor in the operation process of the sewage treatment station, the main odor sources are main odor sources in a grid pump station pool, an adjusting pool, a sludge concentration pool and the like, main odor substances are ammonia, hydrogen sulfide and methyl mercaptan, the main odor substances are collected through a collecting pipeline and conveyed to a biological deodorization device by a fan, and the odor substances are decomposed into CO2 and other odorless inorganic substances by the biological deodorization device, so that the odor is removed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114702205A (en) * | 2022-04-12 | 2022-07-05 | 漳州职业技术学院 | High-phosphorus food industrial wastewater treatment method and treatment system thereof |
| CN114873869A (en) * | 2022-06-15 | 2022-08-09 | 广东新泰隆环保集团有限公司 | Sewage treatment and purification system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN211595373U (en) * | 2019-12-31 | 2020-09-29 | 广东莞绿环保工程有限公司 | Kitchen remains leachate sewage treatment system |
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| CN114702205A (en) * | 2022-04-12 | 2022-07-05 | 漳州职业技术学院 | High-phosphorus food industrial wastewater treatment method and treatment system thereof |
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