CN110407419B - IV-class standard surface water sewage treatment process and equipment - Google Patents
IV-class standard surface water sewage treatment process and equipment Download PDFInfo
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- CN110407419B CN110407419B CN201910824615.9A CN201910824615A CN110407419B CN 110407419 B CN110407419 B CN 110407419B CN 201910824615 A CN201910824615 A CN 201910824615A CN 110407419 B CN110407419 B CN 110407419B
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- 239000010865 sewage Substances 0.000 title claims abstract description 63
- 239000002352 surface water Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000012528 membrane Substances 0.000 claims abstract description 39
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000003647 oxidation Effects 0.000 claims abstract description 20
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 20
- 239000010802 sludge Substances 0.000 claims abstract description 16
- 230000001546 nitrifying effect Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 10
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 17
- 229910052698 phosphorus Inorganic materials 0.000 claims description 17
- 239000011574 phosphorus Substances 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 244000005700 microbiome Species 0.000 claims description 12
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 11
- 239000000701 coagulant Substances 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 9
- 238000010992 reflux Methods 0.000 claims description 8
- 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 claims description 6
- 230000002195 synergetic effect Effects 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 claims description 5
- 231100000719 pollutant Toxicity 0.000 claims description 5
- 230000002411 adverse Effects 0.000 claims description 3
- 230000003851 biochemical process Effects 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims 1
- 238000007142 ring opening reaction Methods 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 208000035473 Communicable disease Diseases 0.000 description 1
- 241000709661 Enterovirus Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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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
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- 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
- C02F3/302—Nitrification and denitrification treatment
-
- 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
- C02F3/308—Biological phosphorus removal
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a sewage treatment process and equipment for IV standard surface water, wherein the equipment comprises a pre-anoxic tank, an anaerobic tank, an anoxic tank, an MBBR aerobic tank, an MBR membrane tank, ECPI electrocatalytic oxidation equipment, a biochar filter tank, an NPDP nitrogen-phosphorus deep purifier and an ecological pond which are sequentially communicated, a nitrifying liquid return pipeline is communicated between the tail end of the MBBR aerobic tank and the front end of the anoxic tank, and a sludge return pipeline is communicated between the tail end of the MBR membrane tank and the pre-anoxic tank. The equipment is manufactured in a standardized way; or a civil engineering and equipment mixed equipment mode, namely a partial civil engineering partial equipment mode; or in a container type modularized arrangement; the sewage treatment process and equipment are advanced; the ecological pond is combined to solve the problem of surrounding environment, and the requirements of rural sewage treatment, standard improvement, urban sewage treatment and standard improvement on IV-class discharge water quality and some local quasi IV-class discharge are met. And meets the construction requirements of sewage and wastewater treatment such as advanced treatment of other industrial sewage.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a IV-class standard surface water sewage treatment process and equipment.
Background
With the rapid development of the production of China society, surface water is polluted to different degrees from various aspects of industry, agriculture, life and the like. The domestic sewage, including urban sewage, is waste water discharged from daily life of residents, and mainly originates from residential buildings and public buildings, such as houses, institutions, schools, hospitals, shops, public places, industrial enterprises, toilets and the like. The domestic sewage including urban sewage contains mainly organic matters (such as protein, carbohydrate, fat, urea, ammonia nitrogen, etc.) and a large number of pathogenic microorganisms (such as parasitic ova and enterovirus, etc.). Organic matters existing in domestic sewage including municipal sewage and the like are extremely unstable and are easy to be decomposed to generate malodor. Bacteria and pathogens are propagated in large quantities by taking organisms in domestic sewage as nutrients, and can lead to epidemic spread of infectious diseases. Therefore, the domestic sewage must be treated before being discharged. The effluent is directly discharged into water bodies of the II type and the III type, and the pollutant control indexes at least comprise chemical oxygen demand (CODCr), pH, suspended Substances (SS), ammonia nitrogen (NH 3-N) and the like; the effluent is directly discharged into the water bodies of the IV type and the V type, and the pollutant control indexes at least comprise chemical oxygen demand (CODCr), pH value, suspended Substances (SS) and the like. The effluent is discharged into a closed water body or a water body which is not up to standard and has an exceeding standard factor of nitrogen and phosphorus, and the control indexes are added with the requirements of Total Nitrogen (TN), total Phosphorus (TP) and the like besides the indexes. Along with the comprehensive improvement of the living standard and the environmental requirement of people, the treatment and discharge requirements on domestic sewage, including urban sewage and the like are not limited to the first-level A discharge standard, the sewage treatment and discharge requirements in some areas are required to meet the IV-class standard surface water discharge standard, even the III-class standard surface water discharge standard, and the current process and equipment technology for the treatment are still to be optimized and perfected so as to meet the corresponding treatment and discharge standards on domestic sewage, including urban sewage and the like. Therefore, we propose a IV standard surface water sewage treatment process and equipment.
Disclosure of Invention
The invention aims to provide a IV-class standard surface water sewage treatment process and equipment, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: a IV-class standard surface water sewage treatment process specifically comprises the following steps: s1, 10% of domestic sewage treatment capacity enters a pre-anoxic tank, and 90% of domestic sewage treatment capacity enters an anaerobic tank;
s2, adding a trace coagulant into the pre-anoxic tank, performing pre-dephosphorization, and then entering an anaerobic tank;
S3, sewage in the anaerobic tank sequentially enters an anoxic tank, an MBBR aerobic tank and an MBR membrane tank, nitrifying liquid in the MBBR aerobic tank flows back to the anoxic tank through a nitrifying liquid backflow pipeline to complete nitrifying and denitrifying, efficient microorganism enrichment filler is arranged in the anaerobic tank, efficient microorganism enrichment denitrification filler is arranged in the anoxic tank, MBBR filler is arranged in the MBBR aerobic tank, and the tail end of the MBBR aerobic tank flows back to the anoxic tank in a way that the air stripping water amount is 300% -800%;
S4, adding a trace coagulant and a coagulant aid into the MBR membrane tank to form micro-flocs, synchronously removing phosphorus, and refluxing sludge in the MBR membrane tank to the pre-anoxic tank through a sludge reflux pipeline, wherein the effluent of the MBR membrane tank reaches or even exceeds the first-level A discharge standard;
S5, enabling effluent of the MBR membrane pond to enter ECPI electrocatalytic oxidation equipment for electrocatalytic oxidation to generate hydroxyl free radicals, deeply oxidatively decomposing organic matters, cracking organic matters which cannot be biochemically degraded, reducing indexes of CODcr, BOD, ammonia nitrogen, TN and TP, carrying out synergistic dephosphorization, and deeply opening rings and breaking chains on organic matters which are difficult to degrade in a conventional biochemical process;
S6, enabling effluent of the ECPI electrocatalytic oxidation equipment to enter a biological carbon filter tank, enriching microorganisms in the water by taking granular activated carbon as a carrier to form a biological membrane, removing pollutants in the water by the synergistic effect of biological degradation of the biological membrane and adsorption of the activated carbon, and further reducing indexes of CODcr, BOD, ammonia nitrogen, TN and TP in the sewage and odor in the sewage;
s7, sequentially feeding the effluent of the biochar filter into an NPDP nitrogen and phosphorus deep purifier and an ecological pond, further treating sewage, reducing indexes of ammonia nitrogen, TN and TP, and performing post phosphorus removal through the NPDP nitrogen and phosphorus deep purifier, wherein the treated effluent reaches IV standard surface water discharge standards, and meets discharge requirements of high standard domestic sewage including urban sewage and the like.
Specifically, the return sludge of the MBR membrane tank and the inflow water with the treatment water amount of 10% enter the pre-anoxic tank, the retention time is about 30min, and microorganisms remove nitrate nitrogen in the return sludge by utilizing organic matters in the inflow water with the treatment water amount of 10% so as to eliminate adverse effects of the nitrate nitrogen on the anaerobic tank, thereby ensuring the stability of the anaerobic tank.
The invention also provides IV standard surface water sewage treatment equipment, which comprises a pre-anoxic tank, an anaerobic tank, an anoxic tank, an MBBR aerobic tank, an MBR membrane tank, ECPI electrocatalytic oxidation equipment, a biochar filter tank, an NPDP nitrogen and phosphorus deep purifier and an ecological pond which are sequentially communicated, wherein a nitrifying liquid return pipeline is communicated between the tail end of the MBBR aerobic tank and the front end of the anoxic tank, and a sludge return pipeline is communicated between the tail end of the MBR membrane tank and the pre-anoxic tank.
Specifically, the pre-anoxic tank, the anaerobic tank, the anoxic tank, the MBBR aerobic tank, the MBR membrane tank, the ECPI electrocatalytic oxidation equipment, the biochar filter tank, the NPDP nitrogen and phosphorus deep purifier and the ecological pond are arranged in a civil engineering and equipment mixing equipment mode, namely a partial civil engineering and partial equipment mode.
Specifically, the pre-anoxic tank, the anaerobic tank, the anoxic tank, the MBBR aerobic tank, the MBR membrane tank, the ECPI electrocatalytic oxidation equipment, the biochar filter tank and the NPDP nitrogen-phosphorus deep purifier are divided into one or more container type integrated equipment or equipment complete skid-mounted equipment; is arranged in a ground type, semi-buried or buried mode.
Compared with the prior art, the invention has the beneficial effects that: the equipment is manufactured in a standardized way; or a civil engineering and equipment mixed equipment mode, namely a partial civil engineering partial equipment mode; or in a container type modularized arrangement; the sewage treatment process and equipment are advanced, and all the equipment occupies small area; the complete equipment skid-mounted modular arrangement; the process and equipment control realizes intelligent PLC or DCS full-automatic control including remote mobile phone APP end control; the ecological pond is combined to solve the problem of surrounding environment, and the requirements of rural sewage treatment, standard improvement, urban sewage treatment and standard improvement on IV-class discharge water quality and some local quasi IV-class discharge are met. And meets the construction requirements of sewage and wastewater treatment such as advanced treatment of other industrial sewage.
Drawings
FIG. 1 is a schematic diagram of the process flow of the present invention.
In the figure: 1 pre-anoxic tank, 2 anaerobic tank, 3 anoxic tank, 4 MBBR aerobic tank, 5 MBR membrane tank, 6 ECPI electrocatalytic oxidation equipment, 7 biological carbon filter tank, 8 NPDP nitrogen-phosphorus deep purifier and 9 ecological pond.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: a IV-class standard surface water sewage treatment process specifically comprises the following steps: s1, 10% of the treatment capacity of domestic sewage including municipal sewage and the like enters a pre-anoxic tank 1, and 90% of the treatment capacity of domestic sewage including municipal sewage and the like enters an anaerobic tank 2;
s2, adding a trace coagulant into the pre-anoxic tank 1, performing pre-dephosphorization, and then entering the anaerobic tank 2;
S3, sewage in the anaerobic tank 2 sequentially enters an anoxic tank 3, an MBBR aerobic tank 4 and an MBR membrane tank 5, nitrified liquid in the MBBR aerobic tank 4 flows back to the anoxic tank 3 through a nitrified liquid backflow pipeline to complete nitrifying and denitrifying, efficient microorganism enrichment filler is arranged in the anaerobic tank 2, efficient microorganism enrichment denitrification filler is arranged in the anoxic tank 3, MBBR filler is arranged in the MBBR aerobic tank 4, and the tail end of the MBBR aerobic tank 4 returns to the anoxic tank 3 by adopting large backflow with 300% -800% of gas stripping water yield;
s4, adding a trace coagulant and a coagulant aid into the MBR membrane tank 5 to form micro-flocs, synchronously removing phosphorus, and refluxing sludge in the MBR membrane tank 5 to the pre-anoxic tank 1 through a sludge reflux pipeline, wherein effluent of the MBR membrane tank 5 reaches or even exceeds a first-stage A discharge standard;
S5, enabling effluent of the MBR membrane pond 5 to enter ECPI electrocatalytic oxidation equipment 6 for electrocatalytic oxidation to generate hydroxyl free radicals, deeply oxidatively decomposing organic matters, cracking the organic matters which cannot be biochemically degraded, reducing indexes of CODcr, BOD5, ammonia nitrogen, TN and TP, performing synergistic dephosphorization, and deeply opening rings and breaking chains on the organic matters which are difficult to degrade in the conventional biochemical process;
S6, enabling effluent of the ECPI electrocatalytic oxidation equipment 6 to enter a biological carbon filter tank 7, enriching microorganisms in the water by taking granular activated carbon as a carrier to form a biological membrane, removing pollutants in the water by the synergistic effect of biological degradation of the biological membrane and adsorption of the activated carbon, and further reducing indexes of CODcr, BOD5, ammonia nitrogen, TN and TP in the sewage and odor in the sewage;
S7, enabling effluent of the biochar filter tank 7 to sequentially enter an NPDP nitrogen and phosphorus deep purifier 8 and an ecological pond 9, further treating sewage, reducing indexes of ammonia nitrogen, TN and TP, performing post-dephosphorization through the NPDP nitrogen and phosphorus deep purifier 8, and enabling treated effluent to reach IV standard surface water discharge standards so as to meet discharge requirements of high standard domestic sewage including urban sewage and the like.
Specifically, the return sludge of the MBR membrane tank 5 and the inflow water with the treatment water quantity of 10% enter the pre-anoxic tank 1, the retention time is about 30min, and microorganisms remove nitrate nitrogen in the return sludge by utilizing organic matters in the inflow water with the treatment water quantity of 10% so as to eliminate adverse effects of the nitrate nitrogen on the anaerobic tank 2, thereby ensuring the stability of the anaerobic tank 2.
The invention also provides IV standard surface water sewage treatment equipment, which comprises a pre-anoxic tank 1, an anaerobic tank 2, an anoxic tank 3, an MBBR aerobic tank 4, an MBR membrane tank 5, ECPI electrocatalytic oxidation equipment 6, a biochar filter tank 7, an NPDP nitrogen phosphorus deep purifier 8 and an ecological pond 9 which are sequentially communicated, wherein a nitrifying liquid return pipeline is communicated between the tail end of the MBBR aerobic tank 4 and the front end of the anoxic tank 3, and a sludge return pipeline is communicated between the tail end of the MBR membrane tank 5 and the pre-anoxic tank 1.
Specifically, the pre-anoxic tank 1, the anaerobic tank 2, the anoxic tank 3, the MBBR aerobic tank 4, the MBR membrane tank 5, the ECPI electrocatalytic oxidation device 6, the biochar filter tank 7, the NPDP nitrogen and phosphorus deep purifier 8 and the ecological pond 9 are arranged in a civil engineering and device mixing equipment mode, namely a partial civil engineering and partial device mode.
Specifically, the pre-anoxic tank 1, the anaerobic tank 2, the anoxic tank 3, the MBBR aerobic tank 4, the MBR membrane tank 5, the ECPI electrocatalytic oxidation equipment 6, the biochar filter tank 7 and the NPDP nitrogen and phosphorus deep purifier 8 are divided into one or more container type integrated equipment or equipment set skid-mounted equipment; is arranged in a ground type, semi-buried or buried mode.
It should be noted that: the electrical components in the process and the equipment are electrically connected with a PLC control system or a DCS control system, and the PLC control system or the DCS control system is connected with a remote mobile phone APP through a cloud network.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A IV-class standard surface water sewage treatment process is characterized in that: the method specifically comprises the following steps:
S1, 10% of the domestic sewage treatment amount enters a pre-anoxic tank (1), and 90% of the domestic sewage treatment amount enters an anaerobic tank (2);
s2, adding a trace coagulant into the pre-anoxic tank (1), performing pre-dephosphorization, and then entering the anaerobic tank (2);
S3, sewage in the anaerobic tank (2) sequentially enters the anoxic tank (3), the MBBR aerobic tank (4) and the MBR membrane tank (5), nitrifying liquid in the MBBR aerobic tank (4) flows back to the anoxic tank (3) through a nitrifying liquid backflow pipeline to complete nitrifying and denitrifying, efficient microorganism enrichment filler is arranged in the anaerobic tank (2), efficient microorganism enrichment denitrification filler is arranged in the anoxic tank (3), MBBR filler is arranged in the MBBR aerobic tank (4), and the tail end of the MBBR aerobic tank (4) adopts a large backflow flow with 300% -800% of stripping water to flow back to the anoxic tank (3);
S4, adding a trace coagulant and a coagulant aid into the MBR membrane tank (5) to form micro flocs, performing synchronous dephosphorization, and refluxing sludge in the MBR membrane tank (5) to the pre-anoxic tank (1) through a sludge reflux pipeline, wherein the effluent of the MBR membrane tank (5) reaches or even exceeds the first-level A discharge standard;
S5, enabling effluent of the MBR membrane pond (5) to enter ECPI electrocatalytic oxidation equipment (6) for electrocatalytic oxidation to generate hydroxyl free radicals, deeply oxidizing and decomposing organic matters, cracking the organic matters which cannot be biochemically degraded, reducing indexes of CODcr, BOD5, ammonia nitrogen, TN and TP, carrying out synergistic dephosphorization, and carrying out deep ring-opening chain breaking on the organic matters which are difficult to degrade in the conventional biochemical process;
S6, the effluent of the ECPI electrocatalytic oxidation equipment (6) enters a biological carbon filter tank (7), the granular activated carbon is used as a carrier to enrich microorganisms in the water to form a biological membrane, pollutants in the water are removed under the synergistic effect of biological degradation of the biological membrane and adsorption of the activated carbon, and indexes of CODcr, BOD5, ammonia nitrogen, TN and TP in the sewage and smell in the sewage are further reduced;
S7, sequentially enabling effluent of the biological carbon filter (7) to enter an NPDP nitrogen and phosphorus deep purifier (8) and an ecological pond (9), further treating sewage, reducing indexes of ammonia nitrogen, TN and TP, and performing post-dephosphorization through the NPDP nitrogen and phosphorus deep purifier (8), wherein treated effluent reaches IV standard surface water discharge standards, and meets discharge requirements of high standard domestic sewage including urban sewage and the like.
2. A class iv standard surface water wastewater treatment process according to claim 1, wherein: the return sludge of the MBR membrane tank (5) and the inflow water with the treatment water quantity of 10% enter the pre-anoxic tank (1), the residence time is about 30min, and microorganisms remove nitrate nitrogen in the return sludge by utilizing organic matters in the inflow water with the treatment water quantity of 10%, so that adverse effects of the nitrate nitrogen on the anaerobic tank (2) are eliminated, and the stability of the anaerobic tank (2) is ensured.
3. The class IV standard surface water sewage treatment equipment for the class IV standard surface water sewage treatment process according to claim 1 comprises a pre-anoxic tank (1), an anaerobic tank (2), an anoxic tank (3), an MBBR aerobic tank (4), an MBR membrane tank (5), an ECPI electrocatalytic oxidation device (6), a biochar filter tank (7), an NPDP nitrogen and phosphorus deep purifier (8) and an ecological pond (9) which are sequentially communicated, and is characterized in that: a nitrifying liquid reflux pipeline is communicated between the tail end of the MBBR aerobic tank (4) and the front end of the anoxic tank (3), and a sludge reflux pipeline is communicated between the tail end of the MBR membrane tank (5) and the pre-anoxic tank (1).
4. A class iv standard surface water wastewater treatment facility according to claim 3, wherein: the pre-anoxic tank (1), the anaerobic tank (2), the anoxic tank (3), the MBBR aerobic tank (4), the MBR membrane tank (5), the ECPI electrocatalytic oxidation equipment (6), the biochar filter tank (7), the NPDP nitrogen and phosphorus deep purifier (8) and the ecological pond (9) are arranged into a civil engineering and equipment mixing equipment mode, namely a partial civil engineering and partial equipment mode.
5. A class iv standard surface water wastewater treatment facility according to claim 3, wherein: the pre-anoxic tank (1), the anaerobic tank (2), the anoxic tank (3), the MBBR aerobic tank (4), the MBR membrane tank (5), the ECPI electrocatalytic oxidation equipment (6), the biochar filter tank (7) and the NPDP nitrogen-phosphorus deep purifier (8) are divided into one or more container type integrated equipment settings or equipment complete set skid-mounted settings; is arranged in a ground type, semi-buried or buried mode.
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