CN109160606B - Method for producing methane and efficiently and deeply denitrifying urban sewage - Google Patents
Method for producing methane and efficiently and deeply denitrifying urban sewage Download PDFInfo
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000010865 sewage Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000010802 sludge Substances 0.000 claims abstract description 53
- 239000012528 membrane Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 16
- 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 abstract description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 47
- 230000003647 oxidation Effects 0.000 claims description 45
- 238000010992 reflux Methods 0.000 claims description 15
- 230000000696 methanogenic effect Effects 0.000 claims description 14
- 230000001546 nitrifying effect Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 12
- 230000014759 maintenance of location Effects 0.000 claims description 9
- 238000005273 aeration Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 241000894006 Bacteria Species 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 238000011081 inoculation Methods 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 claims description 2
- 231100000719 pollutant Toxicity 0.000 claims description 2
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 12
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 6
- 239000005431 greenhouse gas Substances 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 80
- 229910021529 ammonia Inorganic materials 0.000 description 40
- 230000008878 coupling Effects 0.000 description 19
- 238000010168 coupling process Methods 0.000 description 19
- 238000005859 coupling reaction Methods 0.000 description 19
- 238000006396 nitration reaction Methods 0.000 description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000002028 Biomass Substances 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- 241001453382 Nitrosomonadales Species 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012510 hollow fiber Substances 0.000 description 2
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical group [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
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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
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/08—Production of synthetic natural gas
-
- 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
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Microbiology (AREA)
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Abstract
本发明公开了一种城市污水产甲烷及高效深度脱氮的方法。属于污水生物处理技术领域。城市污水首先进入厌氧膜生物反应器，颗粒污泥将水中有机物转化为甲烷，通过膜组件截留污泥和溶解态甲烷，提高甲烷气体收集率，减少出水中溶解态甲烷作为温室气体释放；随后出水和从硝化反应器回流的硝化液一起进入到短程反硝化耦合厌氧氨氧化反应器，颗粒污泥将硝态氮还原为亚硝态氮，同时将亚硝态氮和部分氨氮转化为氮气；接着出水进入短程硝化厌氧氨氧化反应器，颗粒污泥将部分氨氮转化为亚硝态氮，再将亚硝态氮和部分氨氮转化为氮气；最后进入硝化反应器，颗粒污泥将亚硝态氮和氨氮氧化为硝态氮，最终达到深度脱氮的目的。
The invention discloses a method for producing methane from urban sewage and high-efficiency and deep denitrification. It belongs to the technical field of sewage biological treatment. The urban sewage first enters the anaerobic membrane bioreactor, and the granular sludge converts the organic matter in the water into methane, and the sludge and dissolved methane are retained by the membrane module to improve the methane gas collection rate and reduce the release of dissolved methane as a greenhouse gas in the effluent; then The effluent and the nitrification liquid returned from the nitrification reactor enter into the short-path denitrification coupled anammox reactor, and the granular sludge reduces the nitrate nitrogen to nitrite nitrogen, and at the same time converts the nitrite nitrogen and part of the ammonia nitrogen into nitrogen. ; Then the effluent enters the short-path nitrification anammox reactor, and the granular sludge converts part of the ammonia nitrogen into nitrite nitrogen, and then converts the nitrite nitrogen and part of the ammonia nitrogen into nitrogen; finally enters the nitrification reactor, and the granular sludge converts the nitrous Nitrate nitrogen and ammonia nitrogen are oxidized to nitrate nitrogen, and finally achieve the purpose of deep denitrification.
Description
Technical Field
The invention relates to a method for producing methane and efficiently and deeply denitrifying urban sewage, belonging to the technical field of biological sewage treatment.
Background
In the face of increasingly strict effluent standards, biological denitrification technologies in municipal sewage plants often face the problems of high energy consumption, high operating cost and large occupied area. At present, most urban sewage plants adopt the traditional biological nitrification and denitrification technology, and an additional carbon source is required to be added in the denitrification process.
The discovery of anaerobic ammoxidation reaction and short-cut denitrification provides a foundation for realizing low-energy-consumption high-efficiency deep denitrification. The anaerobic ammonia oxidation reaction belongs to biological autotrophic denitrification, only partial ammonia nitrogen is required to be oxidized into nitrite nitrogen as an electron acceptor, the rest ammonia nitrogen is used as an electron donor, nitrogen-containing pollutants in the sewage are converted into nitrogen to be released, the deep biological denitrification is realized, and the aeration amount and the carbon source adding amount are saved; in the short-cut denitrification process, part of denitrifying bacteria can only reduce nitrate nitrogen into nitrite nitrogen, and denitrification is performed by combining anaerobic ammonia oxidation, so that the energy consumption of biological denitrification aeration and the carbon source demand can be reduced. In addition, compared with the use of more floc activated sludge in urban sewage plants, the granular sludge has the advantage of large biomass, and the possibility of improving the denitrification efficiency and reducing the occupied area of the urban sewage plants is provided.
Disclosure of Invention
The invention aims to provide a method for producing methane and efficiently and deeply denitrifying municipal sewage aiming at the problems of high energy consumption, high operation cost and low denitrification efficiency of the biological denitrification of the municipal sewage.
The technical scheme of the invention is as follows: provides a device used in a method for producing methane and efficiently and deeply denitrifying urban sewage, which comprises the following steps: the system is provided with a raw water tank, a methanogenic membrane bioreactor, a short-cut denitrification coupling anaerobic ammonia oxidation reactor, a short-cut nitrification anaerobic ammonia oxidation reactor and a nitrification reactor; the raw water tank is connected with a water inlet valve of the methanogenic membrane bioreactor through a water inlet pump of the methanogenic membrane bioreactor; the methane membrane bioreactor is cylindrical and internally contains granular sludge, the top end of the methane membrane bioreactor is provided with a three-phase separator exhaust port, the right side of the methane membrane bioreactor is provided with a sampling port, and the left side of the methane membrane bioreactor is provided with a circulating liquid water pump and a circulating liquid control valve to enable the granular sludge to be in a fluidized state; a water outlet pipe of the methanogenic membrane bioreactor is connected with a short-cut denitrification coupling anaerobic ammonia oxidation reactor through a water inlet valve of the short-cut denitrification coupling anaerobic ammonia oxidation reactor, and the short-cut denitrification coupling anaerobic ammonia oxidation reactor is cylindrical and contains granular sludge; a water outlet pipe of the short-cut denitrification coupling anaerobic ammonia oxidation reactor is connected with the short-cut nitrification anaerobic ammonia oxidation reactor through a water inlet valve of the short-cut nitrification anaerobic ammonia oxidation reactor, the short-cut nitrification anaerobic ammonia oxidation reactor is cylindrical and contains granular sludge, an aeration head is arranged at the bottom of the reactor, oxygen is provided by an air compressor, and the air flow is controlled by a gas flow meter and a gas flow regulating valve; the water outlet pipe of the shortcut nitrification anaerobic ammonia oxidation reactor is connected with the nitrification reactor through a water inlet valve of the nitrification reactor, the nitrification reactor is in a column shape and contains granular sludge, the bottom of the reactor is also provided with an aeration head, oxygen is provided by an air compressor, and the air flow is controlled by a gas flow meter and a gas flow regulating valve; the nitrifying liquid internal reflux pump is connected with the short-cut denitrification coupling anaerobic ammonia oxidation reactor through a nitrifying liquid internal reflux valve, and finally, the effluent is discharged through a water outlet pipe of the nitrifying reactor.
The method comprises the following steps:
1) starting the system: inoculating methane-producing granular sludge with good activity and adding the methane-producing granular sludge into a methane-producing membrane bioreactor; inoculating short-range denitrification anaerobic ammonia oxidation granular sludge with good activity, and adding the sludge into a denitrification coupling anaerobic ammonia oxidation reactor; inoculating short-cut nitrification anaerobic ammonium oxidation granular sludge with good activity and adding the sludge into a short-cut nitrification anaerobic ammonium oxidation reactor; inoculating granular sludge with good nitrification activity, and feeding the granular sludge into a nitrification reactor, wherein the sludge concentration after the inoculation of the four reactors is 10-15 g/L;
2) the runtime adjustment operation is as follows:
2.1) the hydraulic retention time of the methanogenic membrane bioreactor is 2.5-3.5 h;
2.2) the residence time of the short-cut denitrification coupling anaerobic ammonia oxidation reactor is 0.5 to 1 hour, and the influent COD/NO is3 --N is 3-5;
2.3) the hydraulic retention time of the partial nitrification anaerobic ammonia oxidation reactor is 0.5-1h, and the DO concentration is 0-0.5 mg/L;
2.4) the hydraulic retention time of the nitration reactor is 0.5-1h, and the DO concentration is 2-4 mg/L;
2.5) the reflux ratio in the nitrifying liquid is 200-400%, when the concentration of the nitrate nitrogen in the effluent of the system is more than 10mg/L, the reflux ratio in the nitrifying liquid is increased, and when the concentration of the nitrate nitrogen in the effluent of the system is less than 5mg/L, the reflux ratio in the nitrifying liquid is reduced.
The treatment process of the urban sewage in the device comprises the following steps: firstly, the sewage enters an anaerobic membrane bioreactor to produce methane, organic matters in the water are converted into methane by granular sludge, the sludge and dissolved methane are intercepted by a membrane component, the methane gas collection rate is improved, the release of the dissolved methane in the effluent as greenhouse gas is reduced, and meanwhile, a circulating water pump ensures that the granular sludge in the reactor is in a fluidized state; then, the effluent of the membrane module and the nitrified liquid flowing back from the nitrification reactor enter a short-cut denitrification coupling anaerobic ammonia oxidation reactor together, denitrifying bacteria in the granular sludge reduce nitrate nitrogen into nitrite nitrogen by using residual organic matters in the influent, and then the nitrite nitrogen and part of ammonia nitrogen are converted into nitrogen by the anaerobic ammonia oxidation bacteria; then the effluent enters a short-cut nitrification anaerobic ammonia oxidation reactor, ammonia oxidizing bacteria in the granular sludge convert part of ammonia nitrogen into nitrite nitrogen, and anaerobic ammonia oxidizing bacteria convert nitrite nitrogen and part of ammonia nitrogen into nitrogen; finally, the sludge enters a nitration reactor, nitrifying bacteria in the granular sludge oxidize nitrite nitrogen and ammonia nitrogen in the water into nitrate nitrogen, and the aim of deep denitrification is finally achieved.
Based on organic matter anaerobic methane production, short-range denitrification reaction and anaerobic ammonia oxidation reaction, the invention has the following advantages compared with the traditional biological denitrification process:
1) most organic matters in the sewage are subjected to anaerobic methanogenesis to realize energy recycling;
2) compared with floc sludge, the granular sludge greatly improves biomass, shortens reaction time and reduces floor area;
3) the granular sludge in a fluidized state can realize surface scrubbing of the membrane component, so that membrane pollution is reduced;
4) the end product of the short-range denitrification is nitrite nitrogen, so that a way of converting the nitrite nitrogen into nitrogen is avoided, and the denitrification process is shortened, so that the amount of organic carbon sources consumed by denitrification can be reduced.
5) Because the ammonia nitrogen part in the sewage is removed by anaerobic ammonia oxidation, only the rest ammonia nitrogen needs aerobic nitrification, and the energy consumption of system operation is saved;
6) the biomembrane reactor has high biological quantity, high load and low sludge production, and can reduce the sludge disposal cost.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus used in the method for producing methane and efficiently and deeply denitrifying municipal sewage according to the present invention.
In the figure, 1 is a raw water tank; 2 is a methane-producing membrane bioreactor; 3 is a short-cut denitrification coupling anaerobic ammonia oxidation reactor; 4 is a short-cut nitrification anaerobic ammonia oxidation reactor; 5 is a nitration reactor; 1.1 is an overflow pipe; 1.2 is an emptying pipe; 2.1 is a methane-producing membrane bioreactor water inlet pump; 2.2 is a water inlet valve of the methane-producing membrane bioreactor; 2.3 is a sampling port; 2.4 is granular sludge; 2.5 is a hollow fiber membrane; 2.6 is a circulating liquid water pump; 2.7 is a circulating liquid control valve; 2.8 is a water outlet pipe of the methanogenic membrane bioreactor; 2.9 is the exhaust port of the three-phase separator; 3.1 is a water inlet pump of the short-cut denitrification coupling anaerobic ammonia oxidation reactor; 3.2 is a water inlet valve of the short-cut denitrification coupling anaerobic ammonia oxidation reactor; 3.3 is a water outlet pipe of the short-cut denitrification coupling anaerobic ammonia oxidation reactor; 4.1 is a water inlet pump of the shortcut nitrification anaerobic ammonia oxidation reactor; 4.2 is a water inlet valve of the shortcut nitrification anaerobic ammonium oxidation reactor; 4.3 is an aeration head; 4.4 is an air compressor; 4.5 is a gas flowmeter; 4.6 is a gas quantity regulating valve; 4.7 is a water outlet pipe of the shortcut nitrification anaerobic ammonia oxidation reactor; 5.1 is an internal reflux valve of the nitrified liquid; 5.2 is an internal reflux pump of the nitrified liquid; 5.3 is a water inlet pump of the nitration reactor; 5.4 is a water inlet valve of the nitration reactor; 5.5 is a water outlet pipe of the nitration reactor.
Detailed Description
The invention is further illustrated with reference to the following figures and examples: as shown in fig. 1, 1 is a raw water tank; 2 is a methane-producing membrane bioreactor; 3 is a short-cut denitrification coupling anaerobic ammonia oxidation reactor; 4 is a short-cut nitrification anaerobic ammonia oxidation reactor; 5 is a nitration reactor; 1.1 is a raw water tank overflow pipe; 1.2 is a raw water tank emptying pipe; 2.1 is a methane-producing membrane bioreactor water inlet pump; 2.2 is a water inlet valve of the methane-producing membrane bioreactor; 2.3 is a sampling port; 2.4 is granular sludge; 2.5 is a hollow fiber membrane; 2.6 is a circulating liquid water pump; 2.7 is a circulating liquid control valve; 2.8 is a water outlet pipe of the methanogenic membrane bioreactor; 2.9 is the exhaust port of the three-phase separator; 3.1 is a water inlet pump of the short-cut denitrification coupling anaerobic ammonia oxidation reactor; 3.2 is a water inlet valve of the short-cut denitrification coupling anaerobic ammonia oxidation reactor; 3.3 is a water outlet pipe of the short-cut denitrification coupling anaerobic ammonia oxidation reactor; 4.1 is a water inlet pump of the shortcut nitrification anaerobic ammonia oxidation reactor; 4.2 is a water inlet valve of the shortcut nitrification anaerobic ammonium oxidation reactor; 4.3 is an aeration head; 4.4 is an air compressor; 4.5 is a gas flowmeter; 4.6 is a gas quantity regulating valve; 4.7 is a water outlet pipe of the shortcut nitrification anaerobic ammonia oxidation reactor; 5.1 is an internal reflux valve of the nitrified liquid; 5.2 is an internal reflux pump of the nitrified liquid; 5.3 is a water inlet pump of the nitration reactor; 5.4 is a water inlet valve of the nitration reactor; 5.5 is a water outlet pipe of the nitration reactor.
The experiment adopts artificial water distribution as raw water, and the specific water quality is as follows: the COD concentration is 200-400mg/L, and the average concentration is 350 mg/L; NH (NH)4 +-N concentration is 30-83mg/L, average 50 mg/L; NO2 --N≤0.5mg/L，NO3 -N is less than or equal to 0.5 mg/L. The test system is shown in figure 1, each reactor is made of organic glass, and the volume of the reactor is 3L.
The specific operation is as follows:
1) starting the system: inoculating methane-producing granular sludge with good activity and adding the methane-producing granular sludge into a methane-producing membrane bioreactor; inoculating short-range denitrification anaerobic ammonia oxidation granular sludge with good activity, and adding the sludge into a denitrification coupling anaerobic ammonia oxidation reactor; inoculating short-cut nitrification anaerobic ammonium oxidation granular sludge with good activity and adding the sludge into a short-cut nitrification anaerobic ammonium oxidation reactor; inoculating granular sludge with good nitrification activity, and feeding the granular sludge into a nitrification reactor, wherein the sludge concentration after the inoculation of the four reactors is 15 g/L.
2) The runtime adjustment operation is as follows:
2.1) the hydraulic retention time of the methanogenic membrane bioreactor is 3 h;
2.2) the residence time of the short-cut denitrification coupling anaerobic ammonia oxidation reactor is 1h, and the COD/NO of the inlet water3 --N is 3-5;
2.3) the hydraulic retention time of the partial nitrification anaerobic ammonia oxidation reactor is 1h, and the DO concentration is 0.2-0.5 mg/L;
2.4) the hydraulic retention time of the nitration reactor is 1h, and the DO concentration is 2-4 mg/L;
2.5) the internal reflux ratio of the nitrifying liquid is 300 percent, when the concentration of nitrate nitrogen in effluent of the system is more than 10mg/L, the internal reflux ratio of the nitrifying liquid is improved, and when the concentration of nitrate nitrogen in effluent of the system is less than 5mg/L, the internal reflux ratio of the nitrifying liquid is reduced.
The test result shows that: after the operation is stable, the COD concentration of the effluent of the system is 20-40 mg/L, and the average concentration is 30 mg/L; NH (NH)4 +-N concentration 0-3 mg/L, average 1.5 mg/L; NO2 --N concentration is 0-1mg/L, average 0.2 mg/L; NO3 -The concentration of N is 0-8 mg/L, and the average is 7.5 mg/L.
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| CN111392865A (en) * | 2020-04-09 | 2020-07-10 | 浙江德慧环保科技有限公司 | Method for treating organic amine wastewater |
| CN111484133A (en) * | 2020-05-06 | 2020-08-04 | 太原理工大学 | A kind of enhanced micro-aerobic methane-producing granular sludge reaction system and treatment method |
| CN111484137B (en) * | 2020-05-18 | 2022-03-25 | 北京工业大学 | High-concentration wastewater treatment system and process adopting AnMBR membrane |
| CN114477613A (en) * | 2021-11-29 | 2022-05-13 | 上海大学 | A method for deep denitrification of landfill leachate |
| CN114084956B (en) * | 2021-12-22 | 2025-03-21 | 北京坦思环保科技有限公司 | A coupled denitrification system and method |
| CN114180722B (en) * | 2021-12-29 | 2024-10-15 | 北京工业大学 | Continuous flow large circulation anaerobic ammonia oxidation process reaction device and real-time control method |
| CN114634244A (en) * | 2022-02-26 | 2022-06-17 | 西北农林科技大学 | Methane fermentation coupling integrated denitrification system and process for livestock and poultry manure wastewater |
| CN116891299A (en) * | 2023-07-31 | 2023-10-17 | 浙江双益环保科技发展有限公司 | Denitrification treatment method for ammonia nitrogen wastewater based on MABR-AnMBR-iron/sulfur autotrophic denitrification system |
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| CN105217890A (en) * | 2015-10-25 | 2016-01-06 | 北京工业大学 | A is strengthened based on DEAMOX 2the apparatus and method of/O+ Biological Contact Oxidation Process biological carbon and phosphorous removal |
| CN106115915A (en) * | 2016-07-10 | 2016-11-16 | 北京工业大学 | Low C/N is than the apparatus and method of city domestic sewage short-cut denitrification/short distance nitration Anammox biomembrane process |
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| CN105217890A (en) * | 2015-10-25 | 2016-01-06 | 北京工业大学 | A is strengthened based on DEAMOX 2the apparatus and method of/O+ Biological Contact Oxidation Process biological carbon and phosphorous removal |
| CN106115915A (en) * | 2016-07-10 | 2016-11-16 | 北京工业大学 | Low C/N is than the apparatus and method of city domestic sewage short-cut denitrification/short distance nitration Anammox biomembrane process |
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