CN116062889B - Device and method for enhancing the synergistic and efficient removal of nitrogen and phosphorus and carbon capture in urban sewage by high-load activated sludge method - Google Patents
Device and method for enhancing the synergistic and efficient removal of nitrogen and phosphorus and carbon capture in urban sewage by high-load activated sludge method Download PDFInfo
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- 239000010802 sludge Substances 0.000 title claims abstract description 180
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000010865 sewage Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 35
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 33
- 239000011574 phosphorus Substances 0.000 title claims abstract description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 29
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 28
- 230000002708 enhancing effect Effects 0.000 title abstract description 10
- 230000002195 synergetic effect Effects 0.000 title description 5
- 230000003647 oxidation Effects 0.000 claims abstract description 109
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 109
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000000855 fermentation Methods 0.000 claims abstract description 45
- 230000004151 fermentation Effects 0.000 claims abstract description 38
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 31
- 238000005273 aeration Methods 0.000 claims abstract description 18
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 99
- 230000002572 peristaltic effect Effects 0.000 claims description 38
- 238000003756 stirring Methods 0.000 claims description 23
- 230000008878 coupling Effects 0.000 claims description 19
- 238000010168 coupling process Methods 0.000 claims description 19
- 238000005859 coupling reaction Methods 0.000 claims description 19
- 239000006228 supernatant Substances 0.000 claims description 15
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 13
- 238000009825 accumulation Methods 0.000 claims description 11
- 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 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 230000014759 maintenance of location Effects 0.000 claims description 7
- 239000002351 wastewater Substances 0.000 claims description 7
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 claims description 6
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 claims description 4
- 238000011081 inoculation Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 2
- 230000001376 precipitating effect Effects 0.000 claims 2
- 238000005728 strengthening Methods 0.000 claims 1
- 239000005416 organic matter Substances 0.000 abstract description 11
- 229910002651 NO3 Inorganic materials 0.000 abstract description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000005431 greenhouse gas Substances 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 80
- 239000007788 liquid Substances 0.000 description 13
- 241000894006 Bacteria Species 0.000 description 8
- 238000011084 recovery Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 4
- 150000002823 nitrates Chemical class 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002826 nitrites Chemical class 0.000 description 2
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004065 wastewater treatment 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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
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Abstract
高负荷活性污泥法强化城市污水氮磷协同高效去除与碳捕获的装置与方法属于污水生物处理领域。城市污水先进入厌氧/好氧高负荷活性污泥系统，吸附有机物的同时实现污水中磷的去除，出水进入短程反硝化耦合厌氧氨氧化系统去除部分氨氮和剩余有机物，利用短程硝化耦合厌氧氨氧化系统实现剩余氨氮的去除，产生的硝酸盐再回流到短程反硝化耦合厌氧氨氧化系统中去除；以厌氧/好氧交替方式运行，吸附有机物的污泥排放到污泥储泥池，经厌氧污泥发酵将大分子有机物水解产生小分子碳源，为短程反硝化耦合厌氧氨氧化系统提供电子供体。本发明不仅实现氮磷的同步深度去除，节省曝气能耗，无需外加碳源，减少温室气体排放，还实现污水碳源回收利用和污泥减量。
The device and method for enhancing the coordinated and efficient removal of nitrogen and phosphorus and carbon capture in urban sewage by high-load activated sludge method belong to the field of biological treatment of sewage. The urban sewage first enters the anaerobic/aerobic high-load activated sludge system, and the phosphorus in the sewage is removed while adsorbing organic matter. The effluent enters the short-range denitrification coupled anaerobic ammonia oxidation system to remove part of the ammonia nitrogen and the remaining organic matter. The short-range nitrification coupled anaerobic ammonia oxidation system is used to remove the remaining ammonia nitrogen. The generated nitrate is then returned to the short-range denitrification coupled anaerobic ammonia oxidation system for removal; the sludge adsorbed with organic matter is operated in an anaerobic/aerobic alternating manner, and is discharged into the sludge storage tank. The macromolecular organic matter is hydrolyzed to produce a small molecular carbon source through anaerobic sludge fermentation, which provides an electron donor for the short-range denitrification coupled anaerobic ammonia oxidation system. The present invention not only realizes the synchronous deep removal of nitrogen and phosphorus, saves aeration energy consumption, does not require an external carbon source, and reduces greenhouse gas emissions, but also realizes the recycling of sewage carbon sources and sludge reduction.
Description
技术领域Technical Field
本发明涉及一种高负荷活性污泥法强化城市污水氮磷协同高效去除与碳捕获装置与方法，属于污水处理技术领域。该方法具体就是通过高负荷活性污泥法(High-rateactivated sludge,HRAS)吸附回收进水中的有机物的同时进行磷的去除；利用短程反硝化耦合厌氧氨氧化系统去除部分氨氮和剩余有机物；再利用短程硝化耦合厌氧氨氧化系统去除剩余的氨氮，出水回流到短程反硝化耦合厌氧氨氧化系统去除过量硝酸盐，实现城市污水氮磷同步去除的同时促进污水资源能源回收利用。The present invention relates to a device and method for enhancing the coordinated and efficient removal of nitrogen and phosphorus and carbon capture in urban sewage by a high-load activated sludge method, and belongs to the technical field of sewage treatment. Specifically, the method uses a high-rate activated sludge method (HRAS) to adsorb and recover organic matter in the influent while removing phosphorus; uses a short-range denitrification coupled anaerobic ammonium oxidation system to remove part of the ammonia nitrogen and remaining organic matter; then uses a short-range nitrification coupled anaerobic ammonium oxidation system to remove the remaining ammonia nitrogen, and the effluent is returned to the short-range denitrification coupled anaerobic ammonium oxidation system to remove excess nitrates, thereby achieving the simultaneous removal of nitrogen and phosphorus in urban sewage while promoting the recycling of sewage resources and energy.
背景技术Background technique
近年来，城市污水量随着城市的发展和居民生活水平的提高而日益增大，污水中的成分也日趋复杂。氮、磷污染随着排放量的增加而更加严重，引起的水体富营养化更是屡见不鲜，不仅影响着人们生活的环境，而且危害人类健康。因此，氮和磷高效去除已成为污水处理的重要目标。In recent years, the amount of urban sewage has increased with the development of cities and the improvement of residents' living standards, and the composition of sewage has become increasingly complex. Nitrogen and phosphorus pollution has become more serious with the increase in discharge, and the eutrophication of water bodies caused by it is common, which not only affects the environment in which people live, but also endangers human health. Therefore, efficient removal of nitrogen and phosphorus has become an important goal of sewage treatment.
然而，传统的脱氮工艺往往需要大量曝气、额外投加有机碳源维持一定的碱度，从而导致运行费用和投资较高，因此在污水处理实际硝化反硝化技术应用中就越来越受到限制。厌氧氨氧化菌在缺氧或厌氧条件下以亚硝酸盐作为电子受体，直接将氨氮转化为氮气。厌氧氨氧化技术不需要外加碳源和曝气，大大减少了能耗和运行费用，同时减少污泥的产生，对水环境治理起着重要的作用。同时，厌氧氨氧化技术的发展为传统脱氮提供了一种新的发展方向。但是，在厌氧氨氧化刚发展开始，面临的挑战就是亚硝态氮的供给问题。在主流城市污水处理系统中，稳定的短程硝化难以实现，导致厌氧氨氧化过程出水积累较高浓度的硝态氮，往往需要进一步去除。但是污水中有机物对厌氧氨氧化的影响以及面对当前国内外资源回收利用大背景的情况下，生物脱氮技术的发展仍需要进一步优化。However, traditional denitrification processes often require a large amount of aeration and additional addition of organic carbon sources to maintain a certain alkalinity, which leads to high operating costs and investment. Therefore, the application of nitrification and denitrification technology in actual sewage treatment is increasingly restricted. Anaerobic ammonium oxidizing bacteria use nitrite as an electron acceptor to directly convert ammonia nitrogen into nitrogen gas under anoxic or anaerobic conditions. Anaerobic ammonium oxidation technology does not require external carbon sources and aeration, which greatly reduces energy consumption and operating costs, while reducing the generation of sludge, and plays an important role in water environment governance. At the same time, the development of anaerobic ammonium oxidation technology provides a new development direction for traditional denitrification. However, at the beginning of the development of anaerobic ammonium oxidation, the challenge faced was the supply of nitrite nitrogen. In mainstream urban sewage treatment systems, stable short-term nitrification is difficult to achieve, resulting in the accumulation of high concentrations of nitrate nitrogen in the effluent of the anaerobic ammonium oxidation process, which often requires further removal. However, the impact of organic matter in sewage on anaerobic ammonium oxidation and the current domestic and foreign resource recycling background, the development of biological denitrification technology still needs to be further optimized.
厌氧氨氧化和短程硝化耦合与传统生物脱氮工艺相比，可以节省60％曝气能耗和100％有机碳源，同时可以大大降低剩余污泥产量。然而亚硝酸盐氧化菌无法完全抑制，短程硝化作为亚硝酸盐来源途径难以稳定维持，同时还会产生部分硝酸盐难以进一步去除，这限制了短程硝化耦合厌氧氨氧化工艺在主流城市污水厂中的应用。短程反硝化相比于短程硝化为厌氧氨氧化提供亚硝酸盐基质相对稳定，也为硝酸盐废水处理提供了新方法。因此，短程反硝化耦合厌氧氨氧化工艺受到人们广泛关注。但是，以上短程硝化及短程反硝化耦合厌氧氨氧化无法实现对磷的回收，探究如何实现深度氮磷同步去除具有重要意义。Compared with the traditional biological denitrification process, the coupling of anaerobic ammonium oxidation and short-term nitrification can save 60% of aeration energy and 100% of organic carbon sources, and can greatly reduce the production of residual sludge. However, nitrite oxidizing bacteria cannot be completely inhibited, and short-term nitrification as a source of nitrite is difficult to maintain stably. At the same time, some nitrates are difficult to further remove, which limits the application of short-term nitrification coupled anaerobic ammonium oxidation process in mainstream urban sewage treatment plants. Compared with short-term nitrification, short-term denitrification provides a relatively stable nitrite substrate for anaerobic ammonium oxidation, and also provides a new method for nitrate wastewater treatment. Therefore, the short-term denitrification coupled anaerobic ammonium oxidation process has attracted widespread attention. However, the above short-term nitrification and short-term denitrification coupled anaerobic ammonium oxidation cannot achieve phosphorus recovery, and it is of great significance to explore how to achieve deep nitrogen and phosphorus simultaneous removal.
面对资源短缺、环境破坏以及污染问题，实现水资源高质量会用的同时回收有用物质是目前的发展趋势。其中，碳源回收是能源回收的核心问题，通过对污水中有机物进行处理然后在进行脱氮除磷可以说是一个较好的发展方向，因此重新拾起对高负荷活性污泥法的热爱。高负荷活性污泥可以实现对碳源的回收，也可以通过调控运行方式实现对磷的去除。本发明就是通过高负荷活性污泥法实现碳源回收的同时，以厌氧/好氧交替方式运行实现磷的去除，然后利用短程反硝化及短程硝化耦合厌氧氨氧化实现深度脱氮，最终达到氮磷同步去除的同时促进能源的回收。In the face of resource shortages, environmental damage and pollution problems, achieving high-quality use of water resources while recovering useful substances is the current development trend. Among them, carbon source recovery is the core issue of energy recovery. It can be said that it is a better development direction to treat organic matter in sewage and then remove nitrogen and phosphorus. Therefore, the love for the high-load activated sludge method has been regained. High-load activated sludge can achieve the recovery of carbon sources, and can also achieve phosphorus removal by regulating the operation mode. The present invention is to achieve carbon source recovery through the high-load activated sludge method, and to remove phosphorus by operating in an anaerobic/aerobic alternating mode, and then use short-term denitrification and short-term nitrification coupled with anaerobic ammonia oxidation to achieve deep denitrification, and finally achieve the simultaneous removal of nitrogen and phosphorus while promoting energy recovery.
发明内容Summary of the invention
本发明的目的就是为了解决上述的技术问题，提出一种高负荷活性污泥法强化城市污水氮磷协同高效去除与碳捕获装置和方法。该装置具体就是通过厌氧/好氧高负荷活性污泥系统将污水中的可生物降解有机物转化为挥发性脂肪酸等发酵产物，聚磷菌释放磷酸盐，然后在好氧条件下进行磷的过量吸收；出水进入短程反硝化耦合厌氧氨氧化系统去除污水中的部分氨氮和剩余有机物，反硝化菌利用高负荷活性污泥法贮存的碳源将硝态氮还原为亚硝酸盐，为厌氧氨氧化菌提供电子供体；短程反硝化耦合厌氧氨氧化系统出水进入短程硝化耦合厌氧氨氧化系统以去除剩余氨氮，控制短程反硝化耦合厌氧氨氧化系统内溶解氧浓度使氨氮转化为亚硝态氮为厌氧氨氧化提供电子供体；出水回流到短程反硝化耦合厌氧氨氧化系统中，去除过量的硝态氮，从而实现城市污水氮磷的同步去除的同时促进污水资源能源回收利用。The purpose of the present invention is to solve the above-mentioned technical problems and to propose a device and method for enhancing the synergistic and efficient removal of nitrogen and phosphorus and carbon capture in urban sewage using a high-load activated sludge method. Specifically, the device converts biodegradable organic matter in sewage into fermentation products such as volatile fatty acids through an anaerobic/aerobic high-load activated sludge system, and polyphosphate bacteria release phosphates, and then absorb excessive phosphorus under aerobic conditions; the effluent enters a short-range denitrification-coupled anaerobic ammonium oxidation system to remove part of the ammonia nitrogen and remaining organic matter in the sewage, and the denitrifying bacteria use the carbon source stored in the high-load activated sludge method to reduce nitrate nitrogen to nitrite, providing an electron donor for anaerobic ammonium oxidizing bacteria; the effluent of the short-range denitrification-coupled anaerobic ammonium oxidation system enters a short-range nitrification-coupled anaerobic ammonium oxidation system to remove the remaining ammonia nitrogen, and the dissolved oxygen concentration in the short-range denitrification-coupled anaerobic ammonium oxidation system is controlled to convert ammonia nitrogen into nitrite nitrogen to provide an electron donor for anaerobic ammonium oxidation; the effluent is returned to the short-range denitrification-coupled anaerobic ammonium oxidation system to remove excess nitrate nitrogen, thereby achieving the simultaneous removal of nitrogen and phosphorus in urban sewage while promoting the recycling of sewage resources and energy.
本发明的目的是通过以下技术方案来实现的：The objective of the present invention is achieved through the following technical solutions:
高负荷活性污泥法强化城市污水氮磷协同高效去除与碳捕获装置，包括进水箱(1)、厌氧/好氧高负荷活性污泥系统(2)、第一中间水箱(3)、短程反硝化耦合厌氧氨氧化系统(4)、第二中间水箱(5)、短程硝化耦合厌氧氨氧化系统(6)、第三中间水箱(7)、污泥储泥池(8)、厌氧污泥发酵系统(9)、发酵液储备箱(10)；A high-load activated sludge method for enhancing the coordinated and efficient removal of nitrogen and phosphorus from urban sewage and carbon capture, comprising a water inlet tank (1), an anaerobic/aerobic high-load activated sludge system (2), a first intermediate water tank (3), a short-cut denitrification coupled anaerobic ammonium oxidation system (4), a second intermediate water tank (5), a short-cut nitrification coupled anaerobic ammonium oxidation system (6), a third intermediate water tank (7), a sludge storage tank (8), an anaerobic sludge fermentation system (9), and a fermentation liquid storage tank (10);
厌氧/好氧高负荷活性污泥系统(2)设有第一蠕动泵(2.1)、第一曝气装置(2.2)、第一气体流量计(2.3)、第一空气泵(2.4)、第一出水口(2.5)、排泥口(2.6)和排泥泵(2.7)；短程反硝化耦合厌氧氨氧化系统(4)设有第二蠕动泵(4.1)、第一搅拌装置(4.2)、第三蠕动泵(4.3)和第二出水口(4.4)；短程硝化耦合厌氧氨氧化系统(6)设有第四蠕动泵(6.1)、第二搅拌装置(6.2)、第二曝气装置(6.3)、第二气体流量计(6.4)和第二空气泵(6.5)、第三出水口(6.6)；厌氧污泥发酵系统(9)设有污泥泵(9.1)、第三搅拌装置(9.2)和第四出水口(9.3)；The anaerobic/aerobic high-load activated sludge system (2) is provided with a first peristaltic pump (2.1), a first aeration device (2.2), a first gas flow meter (2.3), a first air pump (2.4), a first water outlet (2.5), a sludge outlet (2.6) and a sludge pump (2.7); the short-range denitrification coupled anaerobic ammonium oxidation system (4) is provided with a second peristaltic pump (4.1), a first stirring device (4.2), a third peristaltic pump (4.3) and a second water outlet (4.4); the short-range nitrification coupled anaerobic ammonium oxidation system (6) is provided with a fourth peristaltic pump (6.1), a second stirring device (6.2), a second aeration device (6.3), a second gas flow meter (6.4), a second air pump (6.5) and a third water outlet (6.6); the anaerobic sludge fermentation system (9) is provided with a sludge pump (9.1), a third stirring device (9.2) and a fourth water outlet (9.3);
进水箱(1)通过第一蠕动泵(2.1)与厌氧/好氧高负荷活性污泥系统(2)进水口相连；厌氧/好氧高负荷活性污泥系统(2)出水排入第一中间水箱(3)；第一中间水箱(3)通过第二蠕动泵(4.1)与短程反硝化耦合厌氧氨氧化系统(4)进水口相连；短程反硝化耦合厌氧氨氧化系统(4)出水进入第二中间水箱(5)；第二中间水箱(5)通过第四蠕动泵(6.1)与短程硝化耦合厌氧氨氧化系统(6)进水口相连；短程硝化耦合厌氧氨氧化系统(6)出水与第一中间水箱(3)相连；厌氧/好氧高负荷活性污泥系统(2)通过排泥装置将剩余污泥排到污泥储泥池(8)中；污泥储泥池(8)通过污泥泵(9.1)与厌氧污泥发酵系统(9)进水口相连；厌氧污泥发酵系统(9)内上清液排到发酵液储备箱(10)中；发酵液储备箱(10)通过第三蠕动泵(4.3)与短程反硝化耦合厌氧氨氧化系统(4)相连；The water inlet tank (1) is connected to the water inlet of the anaerobic/aerobic high-load activated sludge system (2) through a first peristaltic pump (2.1); the effluent of the anaerobic/aerobic high-load activated sludge system (2) is discharged into a first intermediate water tank (3); the first intermediate water tank (3) is connected to the water inlet of the short-distance denitrification coupled anaerobic ammonium oxidation system (4) through a second peristaltic pump (4.1); the effluent of the short-distance denitrification coupled anaerobic ammonium oxidation system (4) enters a second intermediate water tank (5); the second intermediate water tank (5) is connected to the water inlet of the short-distance nitrification coupled anaerobic ammonium oxidation system (6 ) water inlet; the effluent of the short-distance nitrification coupled anaerobic ammonium oxidation system (6) is connected to the first intermediate water tank (3); the anaerobic/aerobic high-load activated sludge system (2) discharges the residual sludge into the sludge storage tank (8) through the sludge discharge device; the sludge storage tank (8) is connected to the water inlet of the anaerobic sludge fermentation system (9) through the sludge pump (9.1); the supernatant in the anaerobic sludge fermentation system (9) is discharged into the fermentation liquid storage tank (10); the fermentation liquid storage tank (10) is connected to the short-distance denitrification coupled anaerobic ammonium oxidation system (4) through the third peristaltic pump (4.3);
高负荷活性污泥法强化城市污水氮磷协同高效去除与碳捕获方法，其特征在于，包括以下过程：A high-load activated sludge method for enhancing the synergistic and efficient removal of nitrogen and phosphorus from urban sewage and carbon capture, characterized by comprising the following processes:
进水箱中废水通过第一蠕动泵进入厌氧/好氧高负荷活性污泥系统内，厌氧水力停留时间1.5-3h，控制好氧水力停留时间为1-3h,溶解氧为0.5-1.5mg/L,污泥龄为2-4d；出水进入第一中间水箱，厌氧/好氧高负荷活性污泥系统内污泥通过排泥泵排到污泥储泥池中；污泥储泥池中的污泥通过污泥泵进入厌氧污泥发酵系统中进行厌氧发酵，排出上清液进入发酵液储备箱中；The wastewater in the water inlet tank enters the anaerobic/aerobic high-load activated sludge system through the first peristaltic pump, the anaerobic hydraulic retention time is 1.5-3h, the aerobic hydraulic retention time is controlled to be 1-3h, the dissolved oxygen is 0.5-1.5mg/L, and the sludge age is 2-4d; the effluent enters the first intermediate water tank, and the sludge in the anaerobic/aerobic high-load activated sludge system is discharged into the sludge storage tank through the sludge discharge pump; the sludge in the sludge storage tank enters the anaerobic sludge fermentation system through the sludge pump for anaerobic fermentation, and the supernatant is discharged into the fermentation liquid storage tank;
接种短程反硝化污泥和厌氧氨氧化污泥于短程反硝化耦合厌氧氨氧化系统中，控制接种后污泥浓度为3000-8000mg/L；接种短程反硝化污泥对亚硝态氮的积累率≥70％，污泥浓度为2500-4000mg/L；接种厌氧氨氧化污泥的氮去除负荷≥0.1kgN/(m3·d)，污泥浓度为3000-6000mg/L；接种的短程反硝化污泥和厌氧氨氧化污泥质量比为1:3-1:5；第一中间水箱中的废水通过第二蠕动泵进入短程反硝化耦合厌氧氨氧化系统；进水结束时将发酵液储备箱中的厌氧发酵上清液通过第三蠕动泵加入到短程反硝化耦合厌氧氨氧化系统，使得碳氮比为2.0-3.5；投加发酵液后缺氧搅拌3-6h，搅拌结束后静置沉淀30-60min，排出上清液，控制排水比40-60％；短程反硝化耦合厌氧氨氧化系统出水进入第二中间水箱；Inoculate short-cut denitrification sludge and anaerobic ammonium oxidation sludge in the short-cut denitrification coupled anaerobic ammonium oxidation system, control the sludge concentration after inoculation to be 3000-8000mg/L; the accumulation rate of nitrite nitrogen by inoculated short-cut denitrification sludge is ≥70%, and the sludge concentration is 2500-4000mg/L; the nitrogen removal load of inoculated anaerobic ammonium oxidation sludge is ≥0.1kgN/(m 3 ·d), the sludge concentration is 3000-6000 mg/L; the mass ratio of the inoculated short-range denitrification sludge and the anaerobic ammonium oxidation sludge is 1:3-1:5; the wastewater in the first intermediate water tank enters the short-range denitrification coupled anaerobic ammonium oxidation system through the second peristaltic pump; at the end of water inflow, the anaerobic fermentation supernatant in the fermentation liquid reserve tank is added to the short-range denitrification coupled anaerobic ammonium oxidation system through the third peristaltic pump, so that the carbon-nitrogen ratio is 2.0-3.5; after adding the fermentation liquid, anoxic stirring is carried out for 3-6 hours, and after the stirring is completed, the stirring is allowed to settle for 30-60 minutes, and the supernatant is discharged, and the drainage ratio is controlled to be 40-60%; the effluent of the short-range denitrification coupled anaerobic ammonium oxidation system enters the second intermediate water tank;
接种短程硝化污泥和厌氧氨氧化污泥于短程硝化耦合厌氧氨氧化系统中，控制短程硝化耦合厌氧氨氧化系统的污泥浓度为3000-5000mg/L；接种的短程硝化污泥对亚硝酸盐的积累率≥80％，污泥浓度为2000-4000mg/L；接种厌氧氨氧化污泥的氮去除负荷≥0.1kgN/(m3·d)，污泥浓度为3000-6000mg/L；接种的短程硝化污泥和厌氧氨氧化污泥质量比为1:2-1:4；第二中间水箱中的废水通过第四蠕动泵进入短程硝化耦合厌氧氨氧化系统中，进水结束后曝气2-6h，溶解氧控制在0.2-0.8mg/L；沉淀30-60min，上清液排出到第三中间水箱，排水比控制在50-80％；第三水箱的出水回流到短程反硝化耦合厌氧氨氧化系统进行硝态氮的去除，控制回流比，使短程反硝化耦合厌氧氨氧化系统进水的硝态氮与氨氮质量浓度比为1.0-1.5。Inoculate short-cut nitrification sludge and anaerobic ammonium oxidation sludge in the short-cut nitrification coupled anaerobic ammonium oxidation system, control the sludge concentration of the short-cut nitrification coupled anaerobic ammonium oxidation system to be 3000-5000mg/L; the accumulation rate of nitrite by the inoculated short-cut nitrification sludge is ≥80%, and the sludge concentration is 2000-4000mg/L; the nitrogen removal load of the inoculated anaerobic ammonium oxidation sludge is ≥0.1kgN/(m 3 ·d), the sludge concentration is 3000-6000 mg/L; the mass ratio of the inoculated short-range nitrification sludge and the anaerobic ammonium oxidation sludge is 1:2-1:4; the wastewater in the second intermediate water tank enters the short-range nitrification coupled anaerobic ammonium oxidation system through the fourth peristaltic pump, and aeration is performed for 2-6 hours after the water inlet is completed, and the dissolved oxygen is controlled at 0.2-0.8 mg/L; sedimentation is performed for 30-60 minutes, and the supernatant is discharged to the third intermediate water tank, and the drainage ratio is controlled at 50-80%; the effluent of the third water tank is returned to the short-range denitrification coupled anaerobic ammonium oxidation system for nitrate nitrogen removal, and the reflux ratio is controlled so that the mass concentration ratio of nitrate nitrogen to ammonia nitrogen in the inlet of the short-range denitrification coupled anaerobic ammonium oxidation system is 1.0-1.5.
本技术通过高负荷活性污泥法实现碳的捕获同时去除污水中的磷，然后利用短程反硝化及短程硝化耦合厌氧氨氧化的联合，处理城市污水。原水首先进入厌氧/好氧高负荷活性污泥系统中，以厌氧/好氧交替方式运行，控制水力停留时间，聚磷菌在厌氧条件下释放磷，在好氧条件下过量吸磷；出水进入短程反硝化耦合厌氧氨氧化系统，系统内的反硝化细菌将硝酸盐还原为亚硝酸盐，而不进行亚硝酸盐还原为氮气的还原过程，此过程亚硝态氮的积累率≥70％，从而实现稳定的亚硝酸盐积累；短程反硝化耦合厌氧氨氧化系统中短程反硝化所需碳源来源于高负荷活性污泥系统贮存的碳源，控制短程反硝化耦合厌氧氨氧化系统内适宜碳氮比和反应时间实现亚硝酸盐的积累；短程反硝化耦合厌氧氨氧化系统出水进入短程硝化耦合厌氧氨氧化系统，通过好氧曝气，控制曝气时间和溶解氧浓度，硝化细菌将原水中的氨氮氧化为亚硝酸盐，而不进一步氧化为硝酸盐，实现亚硝酸盐的积累，为厌氧氨氧化提供电子供体，出水回流到短程反硝化耦合厌氧氨氧化系统去除过量硝酸盐，从而实现城市生活污水氮磷的同步去除。This technology uses a high-load activated sludge method to capture carbon and remove phosphorus from sewage at the same time, and then uses a combination of short-term denitrification and short-term nitrification coupled with anaerobic ammonia oxidation to treat urban sewage. The raw water first enters the anaerobic/aerobic high-load activated sludge system, which operates in an anaerobic/aerobic alternating mode to control the hydraulic retention time. Polyphosphate-accumulating bacteria release phosphorus under anaerobic conditions and absorb excessive phosphorus under aerobic conditions. The effluent enters the short-term denitrification coupled anaerobic ammonia oxidation system. The denitrifying bacteria in the system reduce nitrates to nitrites without reducing nitrites to nitrogen gas. The accumulation rate of nitrite nitrogen in this process is ≥70%, thereby achieving stable nitrite accumulation. The carbon source required for short-term denitrification in the short-term denitrification coupled anaerobic ammonia oxidation system comes from the high-load activated sludge system. The stored carbon source controls the appropriate carbon-nitrogen ratio and reaction time in the short-range denitrification coupled anaerobic ammonium oxidation system to achieve the accumulation of nitrite; the effluent from the short-range denitrification coupled anaerobic ammonium oxidation system enters the short-range nitrification coupled anaerobic ammonium oxidation system, and through aerobic aeration, the aeration time and dissolved oxygen concentration are controlled, and the nitrifying bacteria oxidize the ammonia nitrogen in the raw water into nitrite instead of further oxidizing it into nitrate, thereby achieving the accumulation of nitrite and providing an electron donor for anaerobic ammonium oxidation. The effluent is returned to the short-range denitrification coupled anaerobic ammonium oxidation system to remove excess nitrate, thereby achieving the simultaneous removal of nitrogen and phosphorus in urban domestic sewage.
本发明涉及的高负荷活性污泥法强化城市污水氮磷协同高效去除与碳捕获工艺和方法具有以下优点：The high-load activated sludge method for enhancing the coordinated and efficient removal of nitrogen and phosphorus from urban sewage and carbon capture and the method disclosed in the present invention have the following advantages:
1)利用短程硝化和短程反硝化两种途径实现亚硝酸盐的产生，为厌氧氨氧化提供电子供体，提高厌氧氨氧化脱氮效率，大大节省了曝气能耗，无需外加碳源，降低运行费用；1) The production of nitrite is achieved by using short-range nitrification and short-range denitrification to provide electron donors for anaerobic ammonium oxidation, improve the efficiency of anaerobic ammonium oxidation denitrification, greatly save aeration energy consumption, and do not require an external carbon source, thus reducing operating costs;
2)短程反硝化耦合厌氧氨氧化能将短程硝化耦合厌氧氨氧化系统产生的过量硝酸盐进一步去除，提高系统的脱氮效率，提高出水水质；2) Short-range denitrification coupled with anaerobic ammonium oxidation can further remove the excess nitrate produced by the short-range nitrification coupled with anaerobic ammonium oxidation system, thereby improving the system’s denitrification efficiency and effluent quality;
3)利用高负荷活性污泥法捕获城市污水中的有机碳源，同时实现资源能源回收利用和磷的去除。3) Use high-load activated sludge method to capture organic carbon sources in urban sewage, while achieving resource and energy recovery and phosphorus removal.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是高负荷活性污泥法强化城市污水氮磷协同高效去除与碳捕获工艺方法的流程图。如图1：1-进水箱；2-厌氧/好氧高负荷活性污泥系统；3-第一中间水箱；4-短程反硝化耦合厌氧氨氧化系统；5-第二中间水箱；6-短程硝化耦合厌氧氨氧化系统；7-第三中间水箱；8-污泥储泥池；9-厌氧污泥发酵系统；10-发酵液储备箱；2.1-第一蠕动泵；2.2-第一曝气装置；2.3-第一气体流量计；2.4-第一空气泵；2.5-第一出水口；2.6-排泥口；2.7-排泥泵；4.1-第二蠕动泵；4.2-第一搅拌装置；4.3-第三蠕动泵；4.4-第二出水口；6.1-第四蠕动泵；6.2-第二搅拌装置；6.3-第二曝气装置；6.4-第二气体流量计；6.5-第二空气泵；6.6-第三出水口；9.1-污泥泵；9.2-第三搅拌装置；9.3-第四出水口。Figure 1 is a flow chart of the high-load activated sludge method for enhancing the coordinated and efficient removal of nitrogen and phosphorus and carbon capture in urban sewage. As shown in Figure 1: 1-water inlet tank; 2-anaerobic/aerobic high-load activated sludge system; 3-first intermediate water tank; 4-short-cut denitrification coupled anaerobic ammonia oxidation system; 5-second intermediate water tank; 6-short-cut nitrification coupled anaerobic ammonia oxidation system; 7-third intermediate water tank; 8-sludge storage tank; 9-anaerobic sludge fermentation system; 10-fermentation liquid storage tank; 2.1-first peristaltic pump; 2.2-first aeration device; 2.3-first gas flowmeter; 2.4-first air pump; 2.5-first water outlet; 2.6-sludge outlet; 2.7-sludge pump; 4.1-second peristaltic pump; 4.2-first stirring device; 4.3-third peristaltic pump; 4.4-second water outlet; 6.1-fourth peristaltic pump; 6.2-second stirring device; 6.3-second aeration device; 6.4-second gas flowmeter; 6.5-second air pump; 6.6-third water outlet; 9.1-sludge pump; 9.2-third stirring device; 9.3-fourth water outlet.
具体实施方式Detailed ways
如图1所示，高负荷活性污泥法强化城市污水氮磷协同高效去除与碳捕获装置，包括进水箱(1)、厌氧/好氧高负荷活性污泥系统(2)、第一中间水箱(3)、短程反硝化耦合厌氧氨氧化系统(4)、第二中间水箱(5)、短程硝化耦合厌氧氨氧化系统(6)、第三中间水箱(7)、污泥储泥池(8)、厌氧污泥发酵系统(9)、发酵液储备箱(10)；As shown in FIG1 , a high-load activated sludge method for enhancing the synergistic and efficient removal of nitrogen and phosphorus and carbon capture in urban sewage comprises a water inlet tank (1), an anaerobic/aerobic high-load activated sludge system (2), a first intermediate water tank (3), a short-cut denitrification coupled anaerobic ammonium oxidation system (4), a second intermediate water tank (5), a short-cut nitrification coupled anaerobic ammonium oxidation system (6), a third intermediate water tank (7), a sludge storage tank (8), an anaerobic sludge fermentation system (9), and a fermentation liquid storage tank (10);
厌氧/好氧高负荷活性污泥系统(2)设有第一蠕动泵(2.1)、第一曝气装置(2.2)、第一气体流量计(2.3)、第一空气泵(2.4)、第一出水口(2.5)、排泥口(2.6)和排泥泵(2.7)；短程反硝化耦合厌氧氨氧化系统(4)设有第二蠕动泵(4.1)、第一搅拌装置(4.2)、第三蠕动泵(4.3)和第二出水口(4.4)；短程硝化耦合厌氧氨氧化系统(6)设有第四蠕动泵(6.1)、第二搅拌装置(6.2)、第二曝气装置(6.3)、第二气体流量计(6.4)和第二空气泵(6.5)、第三出水口(6.6)；厌氧污泥发酵系统(9)设有污泥泵(9.1)、第三搅拌装置(9.2)和第四出水口(9.3)；The anaerobic/aerobic high-load activated sludge system (2) is provided with a first peristaltic pump (2.1), a first aeration device (2.2), a first gas flow meter (2.3), a first air pump (2.4), a first water outlet (2.5), a sludge outlet (2.6) and a sludge pump (2.7); the short-range denitrification coupled anaerobic ammonium oxidation system (4) is provided with a second peristaltic pump (4.1), a first stirring device (4.2), a third peristaltic pump (4.3) and a second water outlet (4.4); the short-range nitrification coupled anaerobic ammonium oxidation system (6) is provided with a fourth peristaltic pump (6.1), a second stirring device (6.2), a second aeration device (6.3), a second gas flow meter (6.4), a second air pump (6.5) and a third water outlet (6.6); the anaerobic sludge fermentation system (9) is provided with a sludge pump (9.1), a third stirring device (9.2) and a fourth water outlet (9.3);
进水箱(1)通过第一蠕动泵(2.1)与厌氧/好氧高负荷活性污泥系统(2)进水口相连；厌氧/好氧高负荷活性污泥系统(2)出水排入第一中间水箱(3)；第一中间水箱(3)通过第二蠕动泵(4.1)与短程反硝化耦合厌氧氨氧化系统(4)进水口相连；短程反硝化耦合厌氧氨氧化系统(4)出水进入第二中间水箱(5)；第二中间水箱(5)通过第四蠕动泵(6.1)与短程硝化耦合厌氧氨氧化系统(6)进水口相连；短程硝化耦合厌氧氨氧化系统(6)出水与第一中间水箱(3)相连；厌氧/好氧高负荷活性污泥系统(2)通过排泥装置将剩余污泥排到污泥储泥池(8)中；污泥储泥池(8)通过污泥泵(9.1)与厌氧污泥发酵系统(9)进水口相连；厌氧污泥发酵系统(9)内上清液排到发酵液储备箱(10)中；发酵液储备箱(10)通过第三蠕动泵(4.3)与短程反硝化耦合厌氧氨氧化系统(4)相连；The water inlet tank (1) is connected to the water inlet of the anaerobic/aerobic high-load activated sludge system (2) through a first peristaltic pump (2.1); the effluent of the anaerobic/aerobic high-load activated sludge system (2) is discharged into a first intermediate water tank (3); the first intermediate water tank (3) is connected to the water inlet of the short-distance denitrification coupled anaerobic ammonium oxidation system (4) through a second peristaltic pump (4.1); the effluent of the short-distance denitrification coupled anaerobic ammonium oxidation system (4) enters a second intermediate water tank (5); the second intermediate water tank (5) is connected to the water inlet of the short-distance nitrification coupled anaerobic ammonium oxidation system (6 ) water inlet; the effluent of the short-distance nitrification coupled anaerobic ammonium oxidation system (6) is connected to the first intermediate water tank (3); the anaerobic/aerobic high-load activated sludge system (2) discharges the residual sludge into the sludge storage tank (8) through the sludge discharge device; the sludge storage tank (8) is connected to the water inlet of the anaerobic sludge fermentation system (9) through the sludge pump (9.1); the supernatant in the anaerobic sludge fermentation system (9) is discharged into the fermentation liquid storage tank (10); the fermentation liquid storage tank (10) is connected to the short-distance denitrification coupled anaerobic ammonium oxidation system (4) through the third peristaltic pump (4.3);
高负荷活性污泥法强化城市污水氮磷协同高效去除与碳捕获方法，包括以下步骤：The high-load activated sludge method for enhancing the synergistic and efficient removal of nitrogen and phosphorus and carbon capture in urban sewage includes the following steps:
进水箱中的城市生活污水通过第一蠕动泵进入厌氧/好氧高负荷活性污泥系统中，厌氧水力停留时间1.5-3h，控制好氧水力停留时间为1-3h,溶解氧为0.5-1.5mg/L,污泥龄为2-4d；厌氧/好氧高负荷活性污泥系统以厌氧/好氧交替方式运行，出水进入第一中间水箱，厌氧/好氧高负荷活性污泥系统污水中的有机物转移至污泥中，污泥通过排泥泵排到污泥储泥池中；污泥储泥池中的污泥通过污泥泵进入厌氧污泥发酵系统中进行厌氧发酵，控制厌氧污泥发酵系统温度为30℃，溶解氧浓度0mg/L，厌氧污泥发酵系统以间歇方式运行，运行时序依次为进泥、搅拌、排泥，排出上清液进入发酵液储备箱中；The urban domestic sewage in the water inlet tank enters the anaerobic/aerobic high-load activated sludge system through the first peristaltic pump, the anaerobic hydraulic retention time is 1.5-3h, the aerobic hydraulic retention time is controlled to be 1-3h, the dissolved oxygen is 0.5-1.5mg/L, and the sludge age is 2-4d; the anaerobic/aerobic high-load activated sludge system operates in an anaerobic/aerobic alternating manner, the effluent enters the first intermediate water tank, the organic matter in the sewage of the anaerobic/aerobic high-load activated sludge system is transferred to the sludge, and the sludge is discharged to the sludge storage tank through the sludge discharge pump; the sludge in the sludge storage tank enters the anaerobic sludge fermentation system through the sludge pump for anaerobic fermentation, the temperature of the anaerobic sludge fermentation system is controlled to be 30°C, the dissolved oxygen concentration is 0mg/L, the anaerobic sludge fermentation system operates in an intermittent manner, and the operating sequence is sludge inlet, stirring, and sludge discharge, and the supernatant is discharged into the fermentation liquid storage tank;
接种短程反硝化污泥和厌氧氨氧化污泥于短程反硝化耦合厌氧氨氧化系统中，控制接种后污泥浓度为3000-8000mg/L；接种的短程反硝化污泥对亚硝态氮的积累率≥70％，污泥浓度为2500-4000mg/L；接种厌氧氨氧化污泥的氮去除负荷≥0.1kgN/(m3·d)，污泥浓度为3000-6000mg/L；接种的短程反硝化污泥和厌氧氨氧化污泥质量比为1:3-1:5；短程反硝化耦合厌氧氨氧化系统以间歇方式运行，第一中间水箱中的污水通过第二蠕动泵进入短程反硝化耦合厌氧氨氧化系统；进水结束时将发酵液储备箱中的厌氧发酵上清液通过第三蠕动泵加入到短程反硝化耦合厌氧氨氧化系统，使得碳氮比为2.0-3.5；投加发酵液后启动第一搅拌装置缺氧搅拌3-6h，搅拌结束后静置沉淀30-60min，排出上清液，控制排水比40-60％；短程反硝化耦合厌氧氨氧化系统出水进入第二中间水箱；Inoculate short-cut denitrification sludge and anaerobic ammonium oxidation sludge in the short-cut denitrification coupled anaerobic ammonium oxidation system, control the sludge concentration after inoculation to be 3000-8000mg/L; the accumulation rate of nitrite nitrogen by the inoculated short-cut denitrification sludge is ≥70%, and the sludge concentration is 2500-4000mg/L; the nitrogen removal load of the inoculated anaerobic ammonium oxidation sludge is ≥0.1kgN/(m 3 ·d), the sludge concentration is 3000-6000mg/L; the mass ratio of the inoculated short-range denitrification sludge and the anaerobic ammonium oxidation sludge is 1:3-1:5; the short-range denitrification coupled anaerobic ammonium oxidation system is operated in an intermittent manner, and the sewage in the first intermediate water tank enters the short-range denitrification coupled anaerobic ammonium oxidation system through the second peristaltic pump; at the end of water inflow, the anaerobic fermentation supernatant in the fermentation liquid reserve tank is added to the short-range denitrification coupled anaerobic ammonium oxidation system through the third peristaltic pump, so that the carbon-nitrogen ratio is 2.0-3.5; after adding the fermentation liquid, the first stirring device is started to anoxically stir for 3-6h, and after the stirring is completed, it is allowed to settle for 30-60min, and the supernatant is discharged, and the drainage ratio is controlled to be 40-60%; the effluent of the short-range denitrification coupled anaerobic ammonium oxidation system enters the second intermediate water tank;
接种短程硝化污泥和厌氧氨氧化污泥于短程硝化耦合厌氧氨氧化系统中，控制短程硝化耦合厌氧氨氧化系统的污泥浓度为3000-5000mg/L；接种的短程硝化污泥对亚硝酸盐的积累率≥80％，污泥浓度为2000-4000mg/L；接种厌氧氨氧化污泥的氮去除负荷≥0.1kgN/(m3·d)，污泥浓度为3000-6000mg/L；接种的短程硝化污泥和厌氧氨氧化污泥质量比为1:2-1:4；短程硝化耦合厌氧氨氧化系统以间歇方式运行，第二中间水箱中的废水通过第四蠕动泵进入短程硝化耦合厌氧氨氧化系统中，进水结束后启动第二搅拌装置并曝气2-6h，溶解氧控制在0.2-0.8mg/L；搅拌结束后沉淀30-60min，上清液排出到第三中间水箱，排水比控制在50-80％；第三水箱的出水回流到短程反硝化耦合厌氧氨氧化系统进行硝态氮的去除，控制回流比，使短程反硝化耦合厌氧氨氧化系统进水的硝态氮与氨氮质量浓度比为1.0-1.5。Inoculate short-cut nitrification sludge and anaerobic ammonium oxidation sludge in the short-cut nitrification coupled anaerobic ammonium oxidation system, control the sludge concentration of the short-cut nitrification coupled anaerobic ammonium oxidation system to be 3000-5000mg/L; the accumulation rate of nitrite by the inoculated short-cut nitrification sludge is ≥80%, and the sludge concentration is 2000-4000mg/L; the nitrogen removal load of the inoculated anaerobic ammonium oxidation sludge is ≥0.1kgN/(m 3 ·d), the sludge concentration is 3000-6000 mg/L; the mass ratio of the inoculated short-range nitrification sludge and the anaerobic ammonium oxidation sludge is 1:2-1:4; the short-range nitrification coupled anaerobic ammonium oxidation system is operated in an intermittent manner, the wastewater in the second intermediate water tank enters the short-range nitrification coupled anaerobic ammonium oxidation system through the fourth peristaltic pump, and after the water inlet is completed, the second stirring device is started and aeration is carried out for 2-6 hours, and the dissolved oxygen is controlled at 0.2-0.8 mg/L; after the stirring is completed, the supernatant is discharged to the third intermediate water tank for 30-60 minutes, and the drainage ratio is controlled at 50-80%; the effluent of the third water tank is returned to the short-range denitrification coupled anaerobic ammonium oxidation system for nitrate nitrogen removal, and the reflux ratio is controlled so that the mass concentration ratio of nitrate nitrogen to ammonia nitrogen in the inlet of the short-range denitrification coupled anaerobic ammonium oxidation system is 1.0-1.5.
连续试验结果表明，通过高负荷活性污泥法实现碳的捕获同时去除污水中的磷，然后利用短程反硝化及短程硝化耦合厌氧氨氧化的联合，处理城市污水，不仅实现氮磷的同步深度去除，而且节省能耗，无需外加碳源，实现资源能源的回收利用。The results of continuous tests show that by using the high-load activated sludge method to capture carbon and remove phosphorus from sewage at the same time, and then using the combination of short-term denitrification and short-term nitrification coupled with anaerobic ammonia oxidation to treat urban sewage, not only can the simultaneous deep removal of nitrogen and phosphorus be achieved, but also energy consumption can be saved, and no external carbon source is required, thus realizing the recycling of resources and energy.
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