CN116239220B - Device and method for synchronously treating acrylic fiber wastewater and domestic sewage by combining sulfur oxidation whole-course nitrification with short-range denitrification anaerobic ammoxidation - Google Patents
Device and method for synchronously treating acrylic fiber wastewater and domestic sewage by combining sulfur oxidation whole-course nitrification with short-range denitrification anaerobic ammoxidation Download PDFInfo
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 110
- 230000003647 oxidation Effects 0.000 title claims abstract description 108
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 47
- 239000011593 sulfur Substances 0.000 title claims abstract description 47
- 239000010865 sewage Substances 0.000 title claims abstract description 44
- 239000002351 wastewater Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 39
- 229920002972 Acrylic fiber Polymers 0.000 title claims abstract description 33
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 106
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 53
- 239000002245 particle Substances 0.000 claims abstract description 29
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 230000001546 nitrifying effect Effects 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 167
- 230000002572 peristaltic effect Effects 0.000 claims description 42
- 238000003756 stirring Methods 0.000 claims description 33
- 239000010802 sludge Substances 0.000 claims description 21
- 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 18
- 238000012806 monitoring device Methods 0.000 claims description 18
- 239000005864 Sulphur Substances 0.000 claims description 13
- 239000008187 granular material Substances 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 9
- 238000001556 precipitation Methods 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 9
- 238000005273 aeration Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 6
- 238000006396 nitration reaction Methods 0.000 claims description 6
- 239000001632 sodium acetate Substances 0.000 claims description 6
- 235000017281 sodium acetate Nutrition 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 3
- 239000010840 domestic wastewater Substances 0.000 claims description 3
- 238000011081 inoculation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 21
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 11
- 241000894006 Bacteria Species 0.000 abstract description 9
- 229910002651 NO3 Inorganic materials 0.000 abstract description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 6
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 abstract description 6
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 231100000419 toxicity Toxicity 0.000 abstract description 2
- 230000001988 toxicity Effects 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000010842 industrial wastewater Substances 0.000 abstract 1
- 230000000813 microbial effect Effects 0.000 abstract 1
- 238000012163 sequencing technique Methods 0.000 abstract 1
- 239000010801 sewage sludge Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000009935 nitrosation Effects 0.000 description 2
- 238000007034 nitrosation reaction Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000011112 process operation Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
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- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material 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
- 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
- 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
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
- C02F2101/40—Organic compounds containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/38—Polymers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (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 device and a method for synchronously treating acrylic fiber wastewater and domestic sewage by combining sulfur oxidation whole-course nitrification with short-range denitrification anaerobic ammoxidation, and belongs to the field of sewage sludge biological treatment. The main reactors are sequencing batch SBR reactors. The method comprises the following steps: the acrylic fiber wastewater enters a sulfur oxidation whole-process nitrifying biomembrane reactor, and sulfur oxidizing bacteria and whole-process nitrifying bacteria convert thiocyanate and ammonia nitrogen into sulfate and nitrate. The effluent from the reactor and domestic sewage enter a short-cut denitrification anaerobic ammonia oxidation particle reactor together, and nitrate, ammonia nitrogen and organic matters are removed cooperatively by denitrifying bacteria and anaerobic ammonia oxidation bacteria. The invention effectively solves the problems of carbon source shortage and weak microbial toxicity resistance in the traditional biological treatment process of industrial wastewater, and can realize the efficient degradation of nitrogen, sulfur and carbon pollutants.
Description
Technical Field
The invention relates to a device and a method for synchronously treating acrylic fiber wastewater and domestic sewage by combining sulfur oxidation whole-course nitrification with short-range denitrification anaerobic ammoxidation, belonging to the technical field of sewage biological treatment.
Background
At present, biochemical treatment is considered as the most economical and effective dominant technology, but only depends on the traditional nitrification and denitrification process to treat acrylic fiber wastewater, and two major barriers of carbon source shortage and biological toxicity are difficult to achieve the standard of effluent quality. In addition, the characteristic inorganic pollutant thiocyanate has direct or indirect contribution to the main control index COD and ammonia nitrogen, so that the quality of effluent water is influenced, and therefore, the double removal of nitrogen and sulfur and the effective removal of organic matters are required to be realized by combining different characteristic processes.
Thiocyanate can be used as a nitrogen source, a sulfur source or a carbon source to be utilized and converted by microorganisms, and the final products are sulfate, carbon dioxide and ammonia nitrogen, wherein most of the ammonia nitrogen is released into a water phase, so that the denitrification load is increased. The control of the pollutant thiocyanate should mainly be focused on two reaction nodes for converting thiocyanate into ammonia nitrogen and converting ammonia nitrogen into nitrogen. Compared with the traditional nitrification reaction, the whole nitrification process can directly convert ammonia nitrogen into nitrate nitrogen in a single microorganism, has high ammonia affinity and strong hypoxia adaptability, and can play a great role in sewage denitrification.
The anaerobic ammonia oxidation technology can simultaneously convert ammonia nitrogen and nitrite into nitrogen without aeration and carbon source, and since the technology is discovered, the technology is mainly applied to sewage treatment technology in a short-cut nitrification coupling anaerobic ammonia oxidation technology mode. The heterotrophic denitrifying bacteria can realize long-term stable and efficient nitrosation yield under the regulation and control of the mass concentration ratio of COD and nitrate nitrogen, the substrate concentration, the temperature and other factors, and breaks through the bottleneck that the nitrosation is difficult to stably supply in the sewage treatment of the anaerobic ammonia oxidation process. Compared with the short-cut nitrification-coupled anaerobic ammonia oxidation process, the short-cut denitrification-coupled anaerobic ammonia oxidation process can save aeration energy consumption and carbon sources, and simultaneously can remove the by-product of anaerobic ammonia oxidation, namely the nitrate nitrogen in situ, and the theoretical denitrification rate is as high as 100%.
The urban domestic sewage is rich in available carbon sources, and the degradable organic matters can not be completely converted into the driving force for sewage denitrification due to the waste of aeration in the aerobic section in the actual process, so that the full utilization of the partial carbon sources has important practical significance. In addition, the abundance and activity of bacteria can be ensured by adopting two biological modes of biological film and particle retention, so that the process operation is stably maintained.
Disclosure of Invention
The invention provides a device and a method for synchronously treating acrylic fiber wastewater and domestic sewage by combining sulfur oxidation whole-course nitrification with short-range denitrification anaerobic ammoxidation. Firstly, treating acrylic fiber wastewater by a sulfur oxidation whole-process nitration reactor, wherein sulfur oxidizing bacteria convert thiocyanate into ammonia nitrogen, sulfate and carbon dioxide by utilizing oxygen, and the whole-process nitration bacteria directly oxidize raw water ammonia nitrogen and sulfur oxidation byproduct ammonia nitrogen into nitrate; the effluent from the reactor and urban sewage are mixed together and enter a short-cut denitrification anaerobic ammonia oxidation reactor, denitrifying bacteria fully utilize a domestic sewage carbon source to reduce nitrite substrates by nitrate, and ammonia nitrogen is synchronously removed by anaerobic ammonia oxidation. Finally, adding a reagent into the water outlet tank to form sulfate precipitate and recycling, thereby achieving the high-efficiency denitrification and desulfurization of the acrylic fiber wastewater and the municipal sewage.
In order to achieve the aim, the device for synchronously treating the acrylic fiber wastewater and the domestic sewage by combining the whole sulfur oxidation process nitrification with the short-range denitrification anaerobic ammoxidation is provided by the invention and is characterized in that: comprises an acrylic fiber waste water raw water tank (1), a sulphur oxidation whole-course nitrification biomembrane reactor (2), an intermediate water tank (3), a domestic sewage raw water tank (4), a short-range denitrification anaerobic ammonia oxidation particle reactor (5), a water outlet tank (6), an automatic real-time control device (7) and a computer (8).
The sulphur oxidation whole-course nitration biological film reactor (2) is provided with a first water inlet peristaltic pump (2.1), a first water inlet (2.2), an alkalinity replenishing bottle (2.3), an alkalinity adding pump (2.4), a first pH/DO real-time monitoring device (2.5), a first electric stirrer (2.6), a first overflow port (2.7), a first water outlet (2.8), a first water outlet peristaltic pump (2.9), a first mud outlet (2.10), an aeration sand head (2.12), an air pump (2.13), an air flowmeter (2.14) and a fixed biological film filler (2.15): the annular hollow filler is made of polyethylene; the short-cut denitrification anaerobic ammonium oxidation granule reactor (5) is provided with a second water inlet peristaltic pump (5.1), a second water inlet (5.2), a third water inlet peristaltic pump (5.3), a third water inlet (5.4), a second electric stirrer (5.5), a second pH/DO real-time monitoring device (5.6), a second overflow port (5.7), a second water outlet (5.8), a second water outlet peristaltic pump (5.9), a second mud discharge port (5.10) and inoculation PD/A integrated granules (5.11).
The acrylic fiber wastewater raw water tank (1) is connected with the sulfur oxidation whole-course nitrification biological membrane reactor (2) through a first water inlet peristaltic pump (2.1), the middle water tank (3) is connected with a second water inlet peristaltic pump (5.1) of the sulfur oxidation whole-course nitrification biological membrane reactor (2) through a first water outlet (2.7) of the sulfur oxidation whole-course nitrification biological membrane reactor (2) respectively, the domestic wastewater raw water tank (4) is connected with a second water inlet (5.2) of the short-range denitrification anaerobic ammonia oxidation particle reactor (5) through a third water inlet peristaltic pump (5.3) and the short-range denitrification anaerobic ammonia oxidation particle reactor (5). The automatic control system (7) is connected with the computer (8) and is used for controlling the first water inlet pump (2.1), the alkalinity adding pump (2.4), the first water outlet pump (2.8), the second water inlet pump (5.1), the second water outlet pump (5.10), the third water inlet pump (5.3), the first pH/DO real-time monitoring device (2.5), the second pH/DO real-time monitoring device (5.6), the first electric stirrer (2.6) and the second electric stirrer (5.5).
The invention provides a method for synchronously treating acrylic fiber wastewater and domestic sewage by combining sulfur oxidation whole-course nitrification and short-range denitrification anaerobic ammoxidation, which is characterized by comprising the following steps of:
1) Starting a sulfur oxidation whole-process nitrification biomembrane reactor: the sulfur oxidation whole-course nitrification biomembrane reactor is connected with surplus sludge in a secondary sedimentation tank of an urban sewage plant, meanwhile, fixed whole-course nitrification biomembrane filling materials are placed, the filling ratio is 20%, the concentration of a sludge mixed solution is 2000-2500mg/L, and the concentration of biomembrane sludge is 2000-4000mg/L; the acrylic fiber wastewater enters a sulfur oxidation whole-process nitrification biomembrane reactor, the pH is monitored in real time through a first pH/DO real-time monitoring device, and when the pH is lower than 7.0, an alkalinity adding pump is started to supplement the alkalinity until the pH is between 7.0 and 8.5. The flora adaptation stage, wherein the sulphur oxidation whole-course nitrifying biomembrane reactor is operated for 2 cycles per day, each cycle lasts for 12 hours, water inflow is carried out for 10 minutes, aerobic stirring is carried out for 540 minutes, precipitation is carried out for 10-15 minutes, water drainage is carried out for 10 minutes, idling is carried out for 145-150 minutes, DO concentration is controlled at 0.6-0.8mg/L, and water drainage ratio is 60%; after 20 days of operation, the water treatment device is operated for 2 periods each day, each period is 12 hours, water inflow is carried out for 10 minutes, anoxic stirring is carried out for 120 minutes, aerobic stirring is carried out for 480 minutes, precipitation is carried out for 10-15 minutes, water is discharged for 10 minutes, and the water discharge ratio is 60 percent when the water treatment device is idle for 85-90 minutes. The DO concentration range of the aerobic section is unchanged, the sludge is not actively discharged, and the temperature is not controlled. And when the generation rate of the sulfate and the removal rate of the nitrate of the aerobic last water are both more than 85 percent and the stable operation is performed for more than 7 days, the complete nitrification biomembrane reactor for sulfur oxidation is successfully started.
2) Starting a short-cut denitrification anaerobic ammonia oxidation particle reactor: inoculating the short-cut denitrification anaerobic ammonia oxidation integrated granular sludge into a short-cut denitrification anaerobic ammonia oxidation granular reactor, wherein the concentration of the mixed liquor sludge is 5000-6000mg/L, the inflow water is simulated wastewater, the carbon source is provided by sodium acetate, the nitrate nitrogen concentration is 60-100 mg/L, the ammonia nitrogen concentration is 50-80 mg/L, the mass concentration ratio of COD to nitrate nitrogen is kept at 2.5-3.0, the short-cut denitrification anaerobic ammonia oxidation integrated granular sludge is operated for 4 periods each day, the inflow time is 10min, the stirring time is 180-240 min, the sedimentation time is 5-10min, the drainage time is 5min, the idle time is 95-160 min, and the drainage ratio is 50%. Sodium acetate is added at the beginning of anoxic stirring, and the adding time is 1-2min. Running for 21 days or more, pumping domestic sewage into a short-cut denitrification anaerobic ammonia oxidation granule reactor, running for 4 cycles each day for 6 hours each cycle, wherein the water inlet time is 10min, the stirring time is 180-240 min, the precipitation time is 5-10min, the drainage time is 5min, the idle time is 95-160 min, and the drainage ratio is 50%. The nitrate nitrogen is supplied by the simulated wastewater, so that the mass concentration ratio of the nitrate nitrogen to the ammonia nitrogen in the initial reaction reactor is kept between 1.0 and 1.2. And after the total nitrogen removal rate of the effluent of the short-cut denitrification anaerobic ammonia oxidation particle reactor is more than 85 percent, the short-cut denitrification anaerobic ammonia oxidation particle reactor stably operates for more than 7 days, which indicates that the short-cut denitrification anaerobic ammonia oxidation particle reactor is successfully started.
3) Joint operation: starting a first water inlet peristaltic pump, pumping acrylic fiber wastewater into a sulfur oxidation whole-course nitrification biomembrane reactor through a first water inlet, running for 2 periods each day, each period for 12 hours, feeding water for 10 minutes, anoxic stirring for 120 minutes, aerobic stirring for 480 minutes, precipitating for 10-15 minutes, draining for 10 minutes, and idling for 85-90 minutes. After the water inlet of the sulfur oxidation whole-course nitrifying biomembrane reactor is finished, an electric stirrer is started, the degradable COD in the acrylic fiber wastewater is fully utilized by the anoxic section, and the DO concentration is controlled to be 0.6-0.8mg/L by starting an air pump in the aerobic section. Simultaneously, the pH value is monitored in real time through a first pH value/DO real-time monitoring device, and when the pH value is lower than 7.0, an alkalinity adding pump is started to supplement the alkalinity until the pH value is between 7.0 and 8.5. After the stirring of the aerobic section is finished, the first water discharge peristaltic pump is started after the sulphur oxidation whole-process nitrification biomembrane reactor is precipitated, and the tail water is discharged to the middle water tank through the first water outlet, wherein the water discharge ratio is 60%. Starting a second water inlet peristaltic pump and a third water inlet peristaltic pump, pumping the sewage in the middle water tank and the domestic sewage raw water tank into a short-range denitrification anaerobic ammonia oxidation granule reactor according to the mass concentration ratio of nitrate nitrogen to ammonia nitrogen of 1.0-1.2, running for 4 periods each day, wherein the water inlet time is 10min, the stirring time is 180-240 min, the sedimentation time is 5-10min, the drainage time is 5min, and the idle time is 95-160 min. After the anoxic stirring is finished and the short-range denitrification anaerobic ammonia oxidation particle reactor is settled, a second drainage pump is opened, and the tail water is drained to a water outlet tank through a second drainage outlet, wherein the drainage ratio is 50%. When the total nitrogen concentration of the effluent of the short-cut denitrification anaerobic ammonia oxidation particle reactor is less than 10mg/L and the operation is stable for more than 14 days, the sulfur oxidation whole-course nitrification biomembrane reactor and the short-cut denitrification anaerobic ammonia oxidation particle reactor can treat acrylic wastewater and domestic sewage simultaneously.
The invention provides a device and a method for synchronously treating acrylic fiber wastewater and domestic sewage by combining sulfur oxidation, whole-course nitrification and short-range denitrification and anaerobic ammoxidation, which are characterized by comprising the following characteristics and advantages:
1) The combined process effectively utilizes degradable organic matters in urban domestic sewage as a denitrification reaction driving force, relates to three autotrophic nitrogen conversion ways of sulfur oxidation reaction, whole-course nitration reaction and anaerobic ammonia oxidation reaction, can effectively reduce external carbon source addition, saves aeration energy consumption, has low sludge yield and reduces process operation cost;
2) The combined process adopts a method for integrating domestic sewage and acrylic fiber wastewater, and can provide a proper matrix proportion for short-range denitrification anaerobic ammoxidation by regulating and controlling the proportion of the two types of sewage;
3) The combined process adopts two biological retention modes of biological membranes and particles, so that not only can the abundance and activity of flora in the reactor be ensured, but also the shock load resistance of the reactor can be improved, and the whole process can still stably run under toxic and harmful environments;
Drawings
FIG. 1 is a device for synchronously treating acrylic fiber wastewater and domestic sewage by combining sulfur oxidation whole-course nitrification with short-range denitrification anaerobic ammoxidation.
In fig. 1: 1-acrylic fiber waste water raw water tank, 2-sulphur oxidation whole-course nitrifying biomembrane reactor, 3-middle water tank, 4-domestic sewage raw water tank, 5-short-range denitrification anaerobic ammonia oxidation granule reactor, 6-water outlet tank, 7-automatic real-time control device and 8-computer.
Detailed Description
The device for synchronously treating acrylic fiber wastewater and domestic sewage by combining sulfur oxidation and whole-course nitrification with short-range denitrification and anaerobic ammoxidation is characterized in that: comprises an acrylic fiber waste water raw water tank (1), a sulphur oxidation whole-course nitrification biomembrane reactor (2), an intermediate water tank (3), a domestic sewage raw water tank (4), a short-range denitrification anaerobic ammonia oxidation particle reactor (5), a water outlet tank (6), an automatic real-time control device (7) and a computer (8).
The sulphur oxidation whole-course nitration biological film reactor (2) is provided with a first water inlet peristaltic pump (2.1), a first water inlet (2.2), an alkalinity replenishing bottle (2.3), an alkalinity adding pump (2.4), a first pH/DO real-time monitoring device (2.5), a first electric stirrer (2.6), a first overflow port (2.7), a first water outlet (2.8), a first water outlet peristaltic pump (2.9), a first mud outlet (2.10), an aeration sand head (2.12), an air pump (2.13), an air flowmeter (2.14) and a fixed biological film filler (2.15): the annular hollow filler is made of polyethylene with an inner diameter of 50mm, a specific surface area of 500m 2/m3 and a density of 0.96g/m 3. The short-cut denitrification anaerobic ammonium oxidation granule reactor (5) is provided with a second water inlet peristaltic pump (5.1), a second water inlet (5.2), a third water inlet peristaltic pump (5.3), a third water inlet (5.4), a second electric stirrer (5.5), a second pH/DO real-time monitoring device (5.6), a second overflow port (5.7), a second water outlet (5.8), a second water outlet peristaltic pump (5.9), a second mud discharge port (5.10) and inoculation PD/A integrated granules (5.11).
The acrylic fiber wastewater raw water tank (1) is connected with the sulfur oxidation whole-course nitrification biological membrane reactor (2) through a first water inlet peristaltic pump (2.1), the middle water tank (3) is connected with a second water inlet peristaltic pump (5.1) of the sulfur oxidation whole-course nitrification biological membrane reactor (2) through a first water outlet (2.7) of the sulfur oxidation whole-course nitrification biological membrane reactor (2) respectively, the domestic wastewater raw water tank (4) is connected with a second water inlet (5.2) of the short-range denitrification anaerobic ammonia oxidation particle reactor (5) through a third water inlet peristaltic pump (5.3) and the short-range denitrification anaerobic ammonia oxidation particle reactor (5). The automatic control system (7) is connected with the computer (8) and is used for controlling the first water inlet pump (2.1), the alkalinity adding pump (2.4), the first water outlet pump (2.8), the second water inlet pump (5.1), the second water outlet pump (5.10), the third water inlet pump (5.3), the first pH/DO real-time monitoring device (2.5), the second pH/DO real-time monitoring device (5.6), the first electric stirrer (2.6) and the second electric stirrer (5.5).
The method for synchronously treating the acrylic fiber wastewater and the domestic sewage by using the device is characterized by comprising the following steps:
1) Starting a sulfur oxidation whole-process nitrification biomembrane reactor: the sulfur oxidation whole-course nitrification biomembrane reactor is connected with surplus sludge in a secondary sedimentation tank of an urban sewage plant, meanwhile, fixed whole-course nitrification biomembrane filling materials are placed, the filling ratio is 20%, the concentration of a sludge mixed solution is 2000-2500mg/L, and the concentration of biomembrane sludge is 2000-4000mg/L; the acrylic fiber wastewater enters a sulfur oxidation whole-process nitrification biomembrane reactor, the pH is monitored in real time through a first pH/DO real-time monitoring device, and when the pH is lower than 7.0, an alkalinity adding pump is started to supplement the alkalinity until the pH is between 7.0 and 8.5. The flora adaptation stage, wherein the sulphur oxidation whole-course nitrifying biomembrane reactor is operated for 2 cycles per day, each cycle lasts for 12 hours, water inflow is carried out for 10 minutes, aerobic stirring is carried out for 540 minutes, precipitation is carried out for 10-15 minutes, water drainage is carried out for 10 minutes, idling is carried out for 145-150 minutes, DO concentration is controlled at 0.6-0.8mg/L, and water drainage ratio is 60%; after 20 days of operation, the water treatment device is operated for 2 periods each day, each period is 12 hours, water inflow is carried out for 10 minutes, anoxic stirring is carried out for 120 minutes, aerobic stirring is carried out for 480 minutes, precipitation is carried out for 10-15 minutes, water is discharged for 10 minutes, and the water discharge ratio is 60 percent when the water treatment device is idle for 85-90 minutes. The DO concentration range of the aerobic section is unchanged, the sludge is not actively discharged, and the temperature is not controlled. And when the generation rate of the sulfate and the removal rate of the nitrate of the aerobic last water are both more than 85 percent and the stable operation is performed for more than 7 days, the complete nitrification biomembrane reactor for sulfur oxidation is successfully started.
2) Starting a short-cut denitrification anaerobic ammonia oxidation particle reactor: inoculating the short-cut denitrification anaerobic ammonia oxidation integrated granular sludge into a short-cut denitrification anaerobic ammonia oxidation granular reactor, wherein the concentration of the mixed liquor sludge is 5000-6000mg/L, the inflow water is simulated wastewater, the carbon source is provided by sodium acetate, the nitrate nitrogen concentration is 60-100 mg/L, the ammonia nitrogen concentration is 50-80 mg/L, the mass concentration ratio of COD to nitrate nitrogen is kept at 2.5-3.0, the short-cut denitrification anaerobic ammonia oxidation integrated granular sludge is operated for 4 periods each day, the inflow time is 10min, the stirring time is 180-240 min, the sedimentation time is 5-10min, the drainage time is 5min, the idle time is 95-160 min, and the drainage ratio is 50%. Sodium acetate is added at the beginning of anoxic stirring, and the adding time is 1-2min. Running for 21 days or more, pumping domestic sewage into a short-cut denitrification anaerobic ammonia oxidation granule reactor, running for 4 cycles each day for 6 hours each cycle, wherein the water inlet time is 10min, the stirring time is 180-240 min, the precipitation time is 5-10min, the drainage time is 5min, the idle time is 95-160 min, and the drainage ratio is 50%. The nitrate nitrogen is supplied by the simulated wastewater, so that the mass concentration ratio of the nitrate nitrogen to the ammonia nitrogen in the initial reaction reactor is kept between 1.0 and 1.2. And after the total nitrogen removal rate of the effluent of the short-cut denitrification anaerobic ammonia oxidation particle reactor is more than 85 percent, the short-cut denitrification anaerobic ammonia oxidation particle reactor stably operates for more than 7 days, which indicates that the short-cut denitrification anaerobic ammonia oxidation particle reactor is successfully started.
3) Joint operation: starting a first water inlet peristaltic pump, pumping acrylic fiber wastewater into a sulfur oxidation whole-course nitrification biomembrane reactor through a first water inlet, running for 2 periods each day, each period for 12 hours, feeding water for 10 minutes, anoxic stirring for 120 minutes, aerobic stirring for 480 minutes, precipitating for 10-15 minutes, draining for 10 minutes, and idling for 85-90 minutes. After the water inlet of the sulfur oxidation whole-course nitrifying biomembrane reactor is finished, an electric stirrer is started, the degradable COD in the acrylic fiber wastewater is fully utilized by the anoxic section, and the DO concentration is controlled to be 0.6-0.8mg/L by starting an air pump in the aerobic section. Simultaneously, the pH value is monitored in real time through a first pH value/DO real-time monitoring device, and when the pH value is lower than 7.0, an alkalinity adding pump is started to supplement the alkalinity until the pH value is between 7.0 and 8.5. After the stirring of the aerobic section is finished, the first water discharge peristaltic pump is started after the sulphur oxidation whole-process nitrification biomembrane reactor is precipitated, and the tail water is discharged to the middle water tank through the first water outlet, wherein the water discharge ratio is 60%. Starting a second water inlet peristaltic pump and a third water inlet peristaltic pump, pumping the sewage in the middle water tank and the domestic sewage raw water tank into a short-range denitrification anaerobic ammonia oxidation granule reactor according to the mass concentration ratio of nitrate nitrogen to ammonia nitrogen of 1.0-1.2, running for 4 periods each day, wherein the water inlet time is 10min, the stirring time is 180-240 min, the sedimentation time is 5-10min, the drainage time is 5min, and the idle time is 95-160 min. After the anoxic stirring is finished and the short-range denitrification anaerobic ammonia oxidation particle reactor is settled, a second drainage pump is opened, and the tail water is drained to a water outlet tank through a second drainage outlet, wherein the drainage ratio is 50%. When the total nitrogen concentration of the effluent of the short-cut denitrification anaerobic ammonia oxidation particle reactor is less than 10mg/L and the operation is stable for more than 14 days, the sulfur oxidation whole-course nitrification biomembrane reactor and the short-cut denitrification anaerobic ammonia oxidation particle reactor can treat acrylic wastewater and domestic sewage simultaneously.
Claims (2)
1. The device for synchronously treating acrylic fiber wastewater and domestic sewage by combining sulfur oxidation and whole-course nitrification with short-range denitrification and anaerobic ammoxidation is characterized in that: the system comprises an acrylic fiber wastewater raw water tank (1), a sulphur oxidation whole-course nitrification biomembrane reactor (2), an intermediate water tank (3), a domestic sewage raw water tank (4), a short-range denitrification anaerobic ammonia oxidation particle reactor (5), a water outlet tank (6), an automatic real-time control device (7) and a computer (8);
The sulphur oxidation whole-course nitration biological film reactor (2) is provided with a first water inlet peristaltic pump (2.1), a first water inlet (2.2), an alkalinity replenishing bottle (2.3), an alkalinity adding pump (2.4), a first pH/DO real-time monitoring device (2.5), a first electric stirrer (2.6), a first overflow port (2.7), a first water outlet (2.8), a first water outlet peristaltic pump (2.9), a first mud outlet (2.10), an aeration sand head (2.12), an air pump (2.13), an air flowmeter (2.14) and a fixed biological film filler (2.15): the short-cut denitrification anaerobic ammonium oxidation granule reactor (5) is provided with a second water inlet peristaltic pump (5.1), a second water inlet (5.2), a third water inlet peristaltic pump (5.3), a third water inlet (5.4), a second electric stirrer (5.5), a second pH/DO real-time monitoring device (5.6), a second overflow port (5.7), a second water outlet (5.8), a second water outlet peristaltic pump (5.9), a second mud discharge port (5.10) and an inoculation PD/A integrated granule (5.11);
The acrylic fiber wastewater raw water tank (1) is connected with the sulfur oxidation whole-course nitrification biological membrane reactor (2) through a first water inlet peristaltic pump (2.1), the middle water tank (3) is connected with a second water inlet peristaltic pump (5.1) through a first water outlet peristaltic pump (2.9) and the sulfur oxidation whole-course nitrification biological membrane reactor (2) respectively, a first overflow port (2.7) is connected with a second water inlet (5.2) of the short-range denitrification anaerobic ammonia oxidation particle reactor (5), and the domestic wastewater raw water tank (4) is connected with the short-range denitrification anaerobic ammonia oxidation particle reactor (5) through a third water inlet peristaltic pump (5.3); the automatic real-time control device (7) is connected with the computer (8) and is used for controlling the first water inlet peristaltic pump (2.1), the alkalinity adding pump (2.4), the first water outlet peristaltic pump (2.9), the second water inlet peristaltic pump (5.1), the second water outlet peristaltic pump (5.9), the third water inlet peristaltic pump (5.3), the first pH/DO real-time monitoring device (2.5), the second pH/DO real-time monitoring device (5.6), the first electric stirrer (2.6) and the second electric stirrer (5.5).
2. The method for synchronously treating acrylic wastewater and domestic sewage by using the device as claimed in claim 1, which is characterized by comprising the following steps:
(1) Starting a sulfur oxidation whole-process nitrification biomembrane reactor: the sulfur oxidation whole-course nitrification biomembrane reactor is connected with surplus sludge in a secondary sedimentation tank of an urban sewage plant, meanwhile, fixed whole-course nitrification biomembrane filling materials are placed, the filling ratio is 20%, the concentration of a sludge mixed solution is 2000-2500mg/L, and the concentration of biomembrane sludge is 2000-4000 mg/L; enabling the acrylic fiber wastewater to enter a sulfur oxidation whole-process nitrification biomembrane reactor, monitoring the pH value in real time through a first pH/DO real-time monitoring device, and starting an alkalinity adding pump to supplement the alkalinity until the pH value is between 7.0 and 8.5 when the pH value is lower than 7.0; the flora adaptation stage, the sulphur oxidation whole-course nitrifying biomembrane reactor is operated for 2 cycles each day, each cycle lasts for 12 hours, water inflow is carried out for 10 minutes, aerobic stirring is carried out for 540 minutes, sedimentation is carried out for 10-15 minutes, water drainage is carried out for 10 minutes, idling is carried out for 145-150 minutes, DO concentration is controlled at 0.6-0.8 mg/L, and water drainage ratio is 60%; after 20 days of operation, the method is operated for 2 periods each day, each period is 12 hours, water inflow is carried out for 10 minutes, anoxic stirring is carried out for 120 minutes, aerobic stirring is carried out for 480 minutes, precipitation is carried out for 10-15 minutes, water drainage is carried out for 10 minutes, and the water drainage ratio is 60% after the method is left for 85-90 minutes; the DO concentration range of the aerobic section is unchanged, mud is not actively discharged, and the temperature is not controlled;
(2) Starting a short-cut denitrification anaerobic ammonia oxidation particle reactor: inoculating short-cut denitrification anaerobic ammonia oxidation integrated granular sludge into a short-cut denitrification anaerobic ammonia oxidation granular reactor, wherein the concentration of mixed liquor sludge is 5000-6000mg/L, the inflow water is simulated wastewater, a carbon source is provided by sodium acetate, the concentration of nitrate nitrogen is 60-100 mg/L, the concentration of ammonia nitrogen is 50-80 mg/L, the mass concentration ratio of COD to nitrate nitrogen is kept at 2.5-3.0, the short-cut denitrification anaerobic ammonia oxidation integrated granular sludge runs for 4 periods each day, the inflow time is 10min, the stirring time is 180-240 min, the sedimentation time is 5-10min, the drainage time is 5min, the idle time is 95-160 min, and the drainage ratio is 50%; sodium acetate is added when anoxic stirring starts, and the adding time is 1-2min; pumping domestic sewage into a short-cut denitrification anaerobic ammonia oxidation particle reactor after 21 days or more operation, wherein the operation is carried out for 4 cycles each day, each cycle is 6 hours, the water inlet time is 10min, the stirring time is 180-240 min, the precipitation time is 5-10min, the drainage time is 5min, the idle time is 95-160 min, and the drainage ratio is 50%; the nitrate nitrogen is supplied by the simulated wastewater, so that the mass concentration ratio of the nitrate nitrogen to the ammonia nitrogen in the initial reaction reactor is kept between 1.0 and 1.2;
(3) Joint operation: starting a first water inlet peristaltic pump, pumping acrylic fiber wastewater into a sulfur oxidation whole-course nitrification biomembrane reactor through a first water inlet, running for 2 periods each day, each period of 12 hours, water inlet for 10 minutes, anoxic stirring for 120 minutes, aerobic stirring for 480 minutes, precipitation for 10-15 minutes, water drainage for 10 minutes, and idling for 85-90 minutes; starting an electric stirrer after the water inlet of the sulfur oxidation whole-course nitrifying biomembrane reactor is finished, fully utilizing the degradable COD in the acrylic fiber wastewater by the anoxic section, and controlling the DO concentration to be 0.6-0.8 mg/L by starting an air pump by the aerobic section; simultaneously, the pH value is monitored in real time through a first pH value/DO real-time monitoring device, and when the pH value is lower than 7.0, an alkalinity adding pump is started to supplement the alkalinity until the pH value is between 7.0 and 8.5; after the stirring of the aerobic section is finished, starting a first water discharge peristaltic pump after the sulphur oxidation whole-process nitrification biomembrane reactor is precipitated, and discharging tail water to an intermediate water tank through a first water outlet, wherein the water discharge ratio is 60%; starting a second water inlet peristaltic pump and a third water inlet peristaltic pump, pumping the sewage in the middle water tank and the domestic sewage raw water tank into a short-range denitrification anaerobic ammonia oxidation granule reactor according to the mass concentration ratio of nitrate nitrogen to ammonia nitrogen of 1.0-1.2, running for 4 periods each day, wherein the water inlet time is 10min, the stirring time is 180-240 min, the sedimentation time is 5-10min, the drainage time is 5min, and the idle time is 95-160 min; after the anoxic stirring is finished and the short-range denitrification anaerobic ammonia oxidation particle reactor is settled, a second drainage pump is opened, and the tail water is drained to a water outlet tank through a second drainage outlet, wherein the drainage ratio is 50%.
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