CN111233285A - Integrated sewage purification and upgrading process - Google Patents
Integrated sewage purification and upgrading process Download PDFInfo
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- CN111233285A CN111233285A CN202010220310.XA CN202010220310A CN111233285A CN 111233285 A CN111233285 A CN 111233285A CN 202010220310 A CN202010220310 A CN 202010220310A CN 111233285 A CN111233285 A CN 111233285A
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- 239000010865 sewage Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 title claims abstract description 18
- 238000000746 purification Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000010802 sludge Substances 0.000 claims abstract description 25
- 238000004062 sedimentation Methods 0.000 claims abstract description 17
- 230000005484 gravity Effects 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 238000005345 coagulation Methods 0.000 claims abstract description 11
- 230000015271 coagulation Effects 0.000 claims abstract description 11
- 238000005273 aeration Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 238000011001 backwashing Methods 0.000 claims description 22
- 239000006247 magnetic powder Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- 239000003344 environmental pollutant Substances 0.000 claims description 13
- 244000005700 microbiome Species 0.000 claims description 13
- 231100000719 pollutant Toxicity 0.000 claims description 13
- 229940037003 alum Drugs 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 10
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 230000000704 physical effect Effects 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000006148 magnetic separator Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 230000003311 flocculating effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims 1
- 238000004064 recycling Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000011449 brick Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- -1 ceramsite Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- C—CHEMISTRY; METALLURGY
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses an integrated sewage purification and upgrading process, which comprises the following steps that A, sewage is lifted into a magnetic coagulation sedimentation system through a sewage pump, and mud and water separation is rapidly realized; B. sewage flows into an intermediate water tank by gravity, and the sewage is fully mixed; C. starting the middle lifting pump, lifting the sewage to a water distribution system of the biological aerated filter, and uniformly distributing the sewage to each component filter by the water distribution system; D. and sewage flows into a water tank of the denitrification deep bed filter through a water outlet weir plate, and a carbon source is added into the tank through a carbon source dosing pump for denitrification reaction. The process combines the magnetic coagulation sedimentation, the aeration biological filter and the denitrification deep bed filter technology, quickly processes high sludge concentration, has comprehensive treatment capacity, and is suitable for the latest upgrading requirement.
Description
Technical Field
The invention belongs to the technical field of sewage treatment equipment, and particularly relates to an integrated sewage purification and upgrading process.
Background
At present, the volume of domestic sewage is greatly increased due to the immigration of the population outside cities in cities and towns, and with the shortage of water resources and the high-speed development of sewage treatment technology, the Chinese water standards are more and more perfect and strict, the water quality indexes of treated effluent are more and more, and the index limit value is lower. Therefore, a plurality of sewage treatment technologies are combined for treatment to meet the requirements of comprehensive and high-efficiency water quality. Therefore, higher requirements are made on the sewage treatment efficiency and capacity of sewage treatment plants, so that optimization and improvement of the process of sewage treatment purification treatment are required.
Disclosure of Invention
The invention aims to provide an integrated sewage purification and standard extraction process which is put into use so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an integrated sewage purification and upgrading process comprises the following steps,
A. sewage is lifted by a sewage pump and enters a magnetic coagulation sedimentation system, and mud and water separation is rapidly realized;
B. sewage flows into an intermediate water tank by gravity, and sewage and water are fully mixed;
C. starting an intermediate lifting pump, lifting sewage to a water distribution system of the biological aerated filter, uniformly distributing the sewage to each component filter by the water distribution system, starting an aeration fan, creating an aerobic environment, removing pollutants such as COD (chemical oxygen demand), BOD (biochemical oxygen demand), ammonia nitrogen, N, P and the like by the action of aerobic microorganisms outside a biological membrane and anaerobic microorganisms inside the biological membrane and the physical properties of a filter material layer, and discharging water from a water outlet weir plate;
D. sewage flows into a water tank of the denitrification deep-bed filter through the water outlet weir plate, a carbon source is added into the tank through the carbon source dosing pump for denitrification reaction, pollutants such as COD (chemical oxygen demand), BOD (biochemical oxygen demand), N (nitrogen oxide), P (phosphorus), and the like in the sewage are removed through the denitrification reaction of anaerobic microorganisms and the physical properties of a filter material layer, and the sewage is discharged normally through the water outlet pipe.
Preferably, the step A also comprises the following steps;
s1, collecting sewage through a sewage pipe network, entering a T1 mixing zone through a water inlet pipe by a lift pump, adding a proper amount of PAC (polyaluminium chloride) into the tank by a PAC (polyaluminium chloride) dosing pump, starting a stirrer for stirring, and adsorbing small sludge particles by PAC with the adsorption bridging capacity of PAC
S2, enabling sewage to flow into a T2 mixing zone by gravity, manually adding magnetic powder into the tank and adding recycled magnetic powder into a magnetic substance outlet of a magnetic separator, starting a stirrer for stirring, constructing magnetic cores by the magnetic powder, and forming triumph alum flocs with PAC sludge flocs;
s3, enabling sewage to flow into a T3 mixing zone by gravity, adding a proper amount of PAM into the tank through a PAM (polyacrylamide) dosing pump, starting a stirrer to stir, and further agglomerating the broken alum flocs into agglomerate alum flocs;
s4, enabling the sewage to flow into a high-efficiency inclined tube sedimentation tank by gravity, further flocculating the cluster alum flocs by using the laminar flow principle of inclined tube filling and the sedimentation and coagulation action to form sludge clusters, carrying out solid-liquid separation, and discharging water through a water outlet weir plate.
Preferably, in the step S4, the magnetic powder is required to be recovered, sludge at the bottom of the inclined tube sedimentation tank is pumped into the high-speed shearing machine through a sludge pump, the sludge flows into the magnetic separator after being sheared, the magnetic powder is separated and then is put into the T2 mixing area for continuous utilization, and the residual sludge is discharged into the sludge tank.
Preferably, in the steps C and D, when the filtering effect of the filter tank is reduced, the backwashing water pump is firstly started to wash with water for a proper time and frequency and then is closed, then the backwashing fan is started to close after air washing, and finally the backwashing fan is started simultaneously and is closed after air-water combined washing to backwash the filter material in the filter tank so as to recover the filtering performance of the filter material.
The invention has the technical effects and advantages that: the integrated sewage purification and upgrading process integrates corresponding treatment processes of the magnetic coagulation sedimentation system, the biological aerated filter and the denitrification deep bed filter, sewage continuously passes through the three treatment tanks to comprehensively treat pollutants such as COD, BOD, ammonia nitrogen, N, P and the like, the treatment efficiency is high, the treatment capacity is comprehensive, and the process is suitable for the latest upgrading requirement.
Drawings
FIG. 1 is a process flow diagram of the present invention.
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.
The invention provides a process as shown in figure 1, and in order to achieve the purpose, the invention provides the following technical scheme: an integrated sewage purification and upgrading process comprises the following steps,
A. sewage is lifted by a sewage pump and enters a magnetic coagulation sedimentation system, and mud and water separation is rapidly realized;
B. sewage flows into an intermediate water tank by gravity, and sewage and water are fully mixed;
C. starting an intermediate lifting pump, lifting sewage to a water distribution system of the biological aerated filter, uniformly distributing the sewage to each component filter by the water distribution system, starting an aeration fan, creating an aerobic environment, removing pollutants such as COD (chemical oxygen demand), BOD (biochemical oxygen demand), ammonia nitrogen, N, P and the like by the action of aerobic microorganisms outside a biological membrane and anaerobic microorganisms inside the biological membrane and the physical properties of a filter material layer, and discharging water from a water outlet weir plate;
the biological aerated filter is a middle-end biochemical treatment, a bearing layer, a filter material layer, a water distribution system, an aeration system, a backwashing water distribution system, a backwashing air inlet system and a water outlet system are arranged in the biological aerated filter, the bearing layer is generally paved by cobblestones, the filter material layer is filled at the upper part of the bearing layer by granular fillers (such as ceramsite, coke, quartz sand, active carbon and the like), the ceramsite is generally 3-5mm, an aerobic environment is aerated in the biological aerated filter by an aeration fan, aerobic microorganisms are cultured outside the added fine ceramsite, anaerobic microorganisms grow in the ceramsite, and the microorganisms can normally grow, reproduce and metabolize by absorbing organic pollutants in sewage, so that a large amount of pollutants (COD, BOD, NH3-N, N, P) are removed; meanwhile, the ceramsite fully wrapped with the biological membrane can adsorb and intercept partial pollutants due to the physical characteristic of close fit of the ceramsite
E. Sewage flows into a water tank of the denitrification deep-bed filter through the water outlet weir plate, a carbon source is added into the tank through the carbon source dosing pump for denitrification reaction, pollutants such as COD (chemical oxygen demand), BOD (biochemical oxygen demand), N (nitrogen oxide), P (phosphorus), and the like in the sewage are removed through the denitrification reaction of anaerobic microorganisms and the physical properties of a filter material layer, and the sewage is discharged normally through the water outlet pipe.
The denitrification deep bed filter is used for end deep treatment, filter bricks, a gravel layer, a filter material layer, a backwashing water distribution system, a backwashing air inlet system and an outlet system are arranged in the denitrification deep bed filter, the filter bricks are laid at the bottom of the denitrification deep bed filter and have good water and gas distribution performance, the gravel layer is generally filled at the upper part of the filter bricks by round hard silica sand, the filter material layer is generally filled at the upper part of the gravel layer by 2-3mm hard silica sand, anaerobic microorganisms are cultured on filter material particles in an anaerobic environment, a carbon source is added into the filter by a carbon source dosing device, nitrifying bacteria reduce nitrate nitrogen and nitrite nitrogen into inorganic matters such as N2 and the like, and COD, P and SS are removed simultaneously; the filtering material particles wrapped with the biological membrane can adsorb and intercept part of pollutants and fallen biological membranes by the physical properties of the particles which are tightly attached.
The sewage is continuously and sequentially led into the magnetic coagulation sedimentation system, the aeration biological filter and the denitrification deep bed filter, the three sewage treatment technologies are integrated, the biomembrane method is combined with short-range nitrification and denitrification, the filtering effect is achieved, pollutants such as COD, BOD, ammonia nitrogen, N, P and the like are comprehensively treated, the treatment efficiency is high, the treatment capacity is comprehensive, and the method is suitable for the latest upgrading requirement.
The step A also comprises the following steps;
s1, collecting sewage through a sewage pipe network, entering a T1 mixing zone through a water inlet pipe by a lift pump, adding a proper amount of PAC (polyaluminium chloride) into the tank by a PAC (polyaluminium chloride) dosing pump, starting a stirrer for stirring, and adsorbing small sludge particles by PAC with the adsorption bridging capacity of PAC
S2, enabling sewage to flow into a T2 mixing zone by gravity, manually adding magnetic powder into the tank and adding recycled magnetic powder into a magnetic substance outlet of a magnetic separator, starting a stirrer for stirring, constructing magnetic cores by the magnetic powder, and forming triumph alum flocs with PAC sludge flocs;
s3, enabling sewage to flow into a T3 mixing zone by gravity, adding a proper amount of PAM into the tank through a PAM (polyacrylamide) dosing pump, starting a stirrer to stir, and further agglomerating the broken alum flocs into agglomerate alum flocs;
the magnetic powder and the pollutants are flocculated and combined into a whole through the steps of S1-S3, so that the coagulation and flocculation effects are enhanced, the density of the generated floc is higher and firmer, the purpose of high-speed sedimentation is achieved, and the efficiency of precipitation and impurity removal is enhanced.
S4, enabling the sewage to flow into a high-efficiency inclined tube sedimentation tank by gravity, further flocculating the cluster alum flocs by using the laminar flow principle of inclined tube filling and the sedimentation and coagulation action to form sludge clusters, carrying out solid-liquid separation, and discharging water through a water outlet weir plate.
And S4, magnetic powder is required to be recovered, sludge at the bottom of the inclined tube sedimentation tank is pumped into the high-speed shearing machine through a sludge pump, the sludge flows into the magnetic separator after shearing, the magnetic powder is separated and then put into a T2 mixing area to be continuously utilized, and the residual sludge is discharged into the sludge tank, so that the magnetic powder is recovered, the raw materials are saved, the cost is reduced, and the practicability is higher.
And C and D, when the filtering effect of the filter tank is reduced, firstly starting a backwashing water pump to wash with water for a proper time and frequency, then closing the backwashing water pump, then starting a backwashing fan to close the backwashing water pump after air washing, finally simultaneously starting the backwashing water pump to close the backwashing water pump after air-water combined washing, backwashing the filter material in the filter tank, removing pollutants intercepted by the filter material and a dropped biological membrane through air-water combined backwashing to recover the biochemical action of the filter tank, and discharging generated nitrogen to keep the normal water passing capacity of the filter tank.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (4)
1. An integrated sewage purification and upgrading process is characterized in that: comprises the following steps of (a) carrying out,
A. sewage is lifted by a sewage pump and enters a magnetic coagulation sedimentation system, and mud and water separation is rapidly realized;
B. sewage flows into an intermediate water tank by gravity, and sewage and water are fully mixed;
C. starting an intermediate lifting pump, lifting sewage to a water distribution system of the biological aerated filter, uniformly distributing the sewage to each component filter by the water distribution system, starting an aeration fan, creating an aerobic environment, removing pollutants such as COD (chemical oxygen demand), BOD (biochemical oxygen demand), ammonia nitrogen, N, P and the like by the action of aerobic microorganisms outside a biological membrane and anaerobic microorganisms inside the biological membrane and the physical properties of a filter material layer, and discharging water from a water outlet weir plate;
D. sewage flows into a water tank of the denitrification deep-bed filter through the water outlet weir plate, a carbon source is added into the tank through the carbon source dosing pump for denitrification reaction, pollutants such as COD (chemical oxygen demand), BOD (biochemical oxygen demand), N (nitrogen oxide), P (phosphorus), and the like in the sewage are removed through the denitrification reaction of anaerobic microorganisms and the physical properties of a filter material layer, and the sewage is discharged normally through the water outlet pipe.
2. The integrated sewage purification and upgrading process according to claim 1, characterized in that: the step A also comprises the following steps;
s1, collecting sewage through a sewage pipe network, entering a T1 mixing zone through a water inlet pipe by a lift pump, adding a proper amount of PAC (polyaluminium chloride) into the tank by a PAC (polyaluminium chloride) dosing pump, starting a stirrer for stirring, and adsorbing small sludge particles by PAC with the adsorption bridging capacity of PAC
S2, enabling sewage to flow into a T2 mixing zone by gravity, manually adding magnetic powder into the tank and adding recycled magnetic powder into a magnetic substance outlet of a magnetic separator, starting a stirrer for stirring, constructing magnetic cores by the magnetic powder, and forming triumph alum flocs with PAC sludge flocs;
s3, enabling sewage to flow into a T3 mixing zone by gravity, adding a proper amount of PAM into the tank through a PAM (polyacrylamide) dosing pump, starting a stirrer to stir, and further agglomerating the broken alum flocs into agglomerate alum flocs;
s4, enabling the sewage to flow into a high-efficiency inclined tube sedimentation tank by gravity, further flocculating the cluster alum flocs by using the laminar flow principle of inclined tube filling and the sedimentation and coagulation action to form sludge clusters, carrying out solid-liquid separation, and discharging water through a water outlet weir plate.
3. The integrated sewage purification and upgrading process according to claim 2, characterized in that: and S4, recycling the magnetic powder, pumping the sludge at the bottom of the inclined tube sedimentation tank into a high-speed shearing machine through a sludge pump, shearing the sludge, flowing into a magnetic separator, separating the magnetic powder, putting the magnetic powder into a T2 mixing zone for continuous utilization, and discharging the residual sludge into a sludge tank.
4. The integrated sewage purification and upgrading process according to claim 3, characterized in that: and C and D, when the filtering effect of the filter tank is reduced, firstly starting a backwashing water pump to wash with water for a proper time and frequency, then closing the backwashing water pump, then starting a backwashing fan to close the backwashing water pump after air washing, finally simultaneously starting the backwashing water pump to close the backwashing water pump after air-water combined washing, and backwashing the filter material in the filter tank to recover the filtering performance of the filter material.
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| CN112010511A (en) * | 2020-09-09 | 2020-12-01 | 福建环球环保科技发展有限公司 | Small complete equipment for treating production wastewater and treatment process thereof |
| CN112321077A (en) * | 2020-10-29 | 2021-02-05 | 深圳多尔威环境技术有限公司 | High-efficient sediment and denitrification sewage treatment system |
| CN112390464A (en) * | 2020-11-05 | 2021-02-23 | 深圳市金锋环境有限公司 | Combined process of magnetic coagulation clarification tank and BAF (biological aerated Filter) with water outlet index reaching surface water IV |
| CN112390463A (en) * | 2020-11-05 | 2021-02-23 | 深圳市金锋环境有限公司 | Combined process for effluent COD, BOD5 and NH3-N, TP indexes reaching surface water IV |
| CN118026433A (en) * | 2023-12-27 | 2024-05-14 | 安徽新宇环保科技股份有限公司 | Micro sewage treatment device based on reinforced coagulation and biological activated carbon |
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| CN112010511A (en) * | 2020-09-09 | 2020-12-01 | 福建环球环保科技发展有限公司 | Small complete equipment for treating production wastewater and treatment process thereof |
| CN112321077A (en) * | 2020-10-29 | 2021-02-05 | 深圳多尔威环境技术有限公司 | High-efficient sediment and denitrification sewage treatment system |
| CN112390464A (en) * | 2020-11-05 | 2021-02-23 | 深圳市金锋环境有限公司 | Combined process of magnetic coagulation clarification tank and BAF (biological aerated Filter) with water outlet index reaching surface water IV |
| CN112390463A (en) * | 2020-11-05 | 2021-02-23 | 深圳市金锋环境有限公司 | Combined process for effluent COD, BOD5 and NH3-N, TP indexes reaching surface water IV |
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