CN108191050B - A low-consumption coordinated treatment method for flue gas desulfurization wastewater and ammonia nitrogen wastewater - Google Patents
A low-consumption coordinated treatment method for flue gas desulfurization wastewater and ammonia nitrogen wastewater Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
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- C02F2101/101—Sulfur compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
Description
技术领域technical field
本发明属于工业水污染物控制领域，涉及两种废水协同处理的方法，具体涉及一种烟气脱硫废水及氨氮废水的低耗协同处理方法。The invention belongs to the field of industrial water pollutant control, and relates to a method for synergistic treatment of two wastewaters, in particular to a low-consumption synergistic treatment method for flue gas desulfurization wastewater and ammonia nitrogen wastewater.
背景技术Background technique
近几年，随着《大气污染防治行动计划》（简称“大气十条”）、新《火电厂大气污染物排放标准》（GB13223-2011）及特别排放限值、《环境空气质量标准》（GB3095-2012）等一系列相关环保法规标准的实施，全面推动了工业烟气脱硫产业的发展。湿法脱硫是目前采用最多的烟气脱硫技术，具有效率高，处理量大等优点，但是运行过程中会产生大量的含有硫酸盐的废水，其无机盐含量高，可生化性差，难以用生物法处理，与工业企业废水以生化法处理的现状不匹配，并且含有大量硫酸盐的废水排入水体后扩散进入沉积层，硫酸盐还原会产生大量硫化氢臭气，同时硫化物与铁盐、锰盐等反应生成FeS、MnS等黑色胶体物质，导致水体呈现黑臭状态。因此烟气脱硫废水的处理已成为一项复杂且又亟需解决的问题。In recent years, with the "Air Pollution Prevention and Control Action Plan" (referred to as "Atmospheric Ten Articles"), the new "Air Pollutant Emission Standards for Thermal Power Plants" (GB13223-2011) and special emission limits, "Ambient Air Quality Standards" (GB3095) -2012) and a series of relevant environmental protection regulations and standards have comprehensively promoted the development of the industrial flue gas desulfurization industry. Wet desulfurization is currently the most widely used flue gas desulfurization technology. It has the advantages of high efficiency and large processing capacity. However, a large amount of wastewater containing sulfate will be generated during operation, and its inorganic salt content is high. It does not match the status quo of biochemical treatment of wastewater in industrial enterprises, and the wastewater containing a large amount of sulfate is discharged into the water body and diffused into the sedimentary layer. The reduction of sulfate will produce a large amount of hydrogen sulfide odor. Manganese salts react to form black colloidal substances such as FeS and MnS, which cause the water body to appear black and odorous. Therefore, the treatment of flue gas desulfurization wastewater has become a complex and urgent problem.
烟气脱硫废水具有高盐度和低生化性的特点。目前，该类废水常采用常规物理法和化学法处理，但此类工艺仅对于悬浮物和重金属离子有较好的去除效果，而难以去除废水中含有的大量硫酸盐，出水水质难以达到要求，并且存在药剂消耗量大、能耗高和成本高等缺点。因此，为了更进一步去除水中的硫酸盐等污染物，需要采用生物法进行处理。目前利用微生物处理含硫废水的方法主要有硫酸盐还原、硫化物氧化及脱硫反硝化等，与常规物理化学法相比，具有技术先进、经济合理、可持续性较高等诸多优点。其中，脱硫反硝化还能实现氮、硫的同步去除。然而，在硫酸盐还原过程中起主要作用的硫酸盐还原菌（SRB）属于异养菌，需利用有机物为电子供体还原硫酸盐。因此，在处理生化性较差的烟气脱硫废水时需要外加碳源，虽然硫化物氧化和脱硫反硝化过程中不需要外加碳源，但却不适用于含有大量硫酸盐的脱硫废水。Flue gas desulfurization wastewater has the characteristics of high salinity and low biochemical properties. At present, this kind of wastewater is often treated by conventional physical methods and chemical methods, but this type of process only has a good removal effect on suspended solids and heavy metal ions, but it is difficult to remove a large amount of sulfate contained in the wastewater, and the effluent quality is difficult to meet the requirements. And there are disadvantages such as large consumption of chemicals, high energy consumption and high cost. Therefore, in order to further remove contaminants such as sulfates in water, biological treatment is required. At present, the methods of using microorganisms to treat sulfur-containing wastewater mainly include sulfate reduction, sulfide oxidation, and desulfurization and denitrification. Compared with conventional physical and chemical methods, it has many advantages such as advanced technology, economical rationality, and high sustainability. Among them, desulfurization and denitrification can also realize the simultaneous removal of nitrogen and sulfur. However, sulfate-reducing bacteria (SRB), which play a major role in the sulfate reduction process, are heterotrophic bacteria that use organic matter as an electron donor to reduce sulfate. Therefore, an external carbon source is required to treat the flue gas desulfurization wastewater with poor biochemical properties. Although no external carbon source is required in the process of sulfide oxidation and desulfurization and denitrification, it is not suitable for desulfurization wastewater containing a large amount of sulfate.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种烟气脱硫废水及氨氮废水低耗协同处理的方法。The purpose of the present invention is to provide a low-consumption synergistic treatment method for flue gas desulfurization wastewater and ammonia nitrogen wastewater.
基于以上目的，本发明采取以下技术方案：Based on the above purpose, the present invention adopts the following technical solutions:
一种烟气脱硫废水及氨氮废水低耗协同处理的方法，包括如下步骤：A method for low-consumption synergistic treatment of flue gas desulfurization wastewater and ammonia nitrogen wastewater, comprising the following steps:
（1）将含有硫酸盐的烟气脱硫废水与氨氮废水汇入混合池混合；(1) The flue gas desulfurization wastewater containing sulfate and ammonia nitrogen wastewater are mixed into the mixing tank;
（2）在混合池中调整混合废水的pH和温度；(2) Adjust the pH and temperature of the mixed wastewater in the mixing tank;
（3）先将活性污泥接种于生物反应池中，再从混合池中引入混合废水，在生物反应池内，活性污泥中的微生物以氨氮为电子供体，将硫酸盐还原成单质硫，同时将氨氮氧化成氮气，实现硫、氮的同步去除；所述活性污泥含有20%～30%的Candidatus Kuenenia、20～30%的Anammoxo-globus sulfate及20～30%的Bacillus benzoevorans种群，三种微生物能够在无分子态氧存在的条件下协同工作，以硫酸盐为电子受体氧化氨氮，实现硫酸盐和氨氮的同步去除。(3) First inoculate the activated sludge in the biological reaction tank, and then introduce the mixed wastewater from the mixing tank. In the biological reaction tank, the microorganisms in the activated sludge use ammonia nitrogen as the electron donor to reduce the sulfate to elemental sulfur, At the same time, ammonia nitrogen is oxidized into nitrogen to achieve simultaneous removal of sulfur and nitrogen; the activated sludge contains 20% to 30% of Candidatus Kuenenia , 20 to 30% of Anammoxo-globus sulfate and 20 to 30% of Bacillus benzoevorans population . The microorganisms can work together in the absence of molecular oxygen, and use sulfate as an electron acceptor to oxidize ammonia nitrogen to achieve simultaneous removal of sulfate and ammonia nitrogen.
所述含有硫酸盐的脱硫废水是含有二氧化硫的烟气经湿法脱硫系统处理后得到。The desulfurization wastewater containing sulfate is obtained after the flue gas containing sulfur dioxide is processed by a wet desulfurization system.
氨氮废水中氨氮的浓度为50～450mg/L，脱硫废水中硫酸盐的浓度为130～2000mg/L，两种废水混合后的溶液中氨氮与硫酸根的摩尔比为1.5～2.5:1，生物反应池内水力停留时间为8～10h，活性污泥的浓度为8～12g/L。The concentration of ammonia nitrogen in the ammonia nitrogen wastewater is 50-450 mg/L, the concentration of sulfate in the desulfurization wastewater is 130-2000 mg/L, and the molar ratio of ammonia nitrogen and sulfate in the mixed solution of the two wastewaters is 1.5-2.5:1. The hydraulic retention time in the reaction tank is 8-10h, and the concentration of activated sludge is 8-12g/L.
步骤（2）中，调整温度为28～32℃，pH为7.5～8.5。In step (2), the temperature is adjusted to 28-32°C, and the pH is 7.5-8.5.
本发明以硫酸盐取代亚硝酸盐作为电子受体将氨氮氧化成氮气，同时硫酸盐还原成硫单质，则既能实现氮、硫的低能耗同步去除，又能达到以废治废的效果。有色金属冶炼等行业往往配套有氮肥生产线产生氨氮废水，氮肥行业有燃煤烟气脱硫产生脱硫废水，为脱硫废水及氨氮废水的低耗协同处理提供了工业化应用的场所。The invention uses sulfate instead of nitrite as an electron acceptor to oxidize ammonia nitrogen into nitrogen gas, and at the same time reduce sulfate to sulfur element, not only can realize the simultaneous removal of nitrogen and sulfur with low energy consumption, but also achieve the effect of treating waste with waste. Non-ferrous metal smelting and other industries are often equipped with nitrogen fertilizer production lines to produce ammonia nitrogen wastewater, and the nitrogen fertilizer industry has coal-fired flue gas desulfurization to produce desulfurization wastewater, which provides an industrial application site for the low-consumption collaborative treatment of desulfurization wastewater and ammonia nitrogen wastewater.
本发明中，之所以选活性污泥中含有20%～30%的Candidatus Kuenenia、20～30%的Anammoxo-globus sulfate及20～30%的Bacillus benzoevorans，是因为，该比例下的三种微生物能够在无分子态氧存在的条件下协同工作，以硫酸盐为电子受体氧化氨氮，实现硫酸盐和氨氮的同步去除，且去除率高，其中硫酸盐的去除率达到75%以上，氨氮的去除率达到87%以上。若Candidatus Kuenenia种群数量占总量的20%以下，Anammoxo-globus sulfate及Bacillus benzoevorans种群大量繁殖，将导致氨氮去除率下降；若Anammoxo- globus sulfate及Bacillus benzoevorans种群含量较低，Candidatus Kuenenia种群大量繁殖，将导致硫酸盐去除率下降。In the present invention, the reason why the activated sludge is selected to contain 20% to 30% of Candidatus Kuenenia , 20 to 30% of Anammoxo-globus sulfate and 20 to 30% of Bacillus benzoevorans is that the three microorganisms in this ratio can In the absence of molecular oxygen, it works collaboratively to oxidize ammonia nitrogen with sulfate as an electron acceptor to achieve simultaneous removal of sulfate and ammonia nitrogen, and the removal rate is high. rate of more than 87%. If the population of Candidatus Kuenenia accounts for less than 20% of the total population, the populations of Anammoxo-globus sulfate and Bacillus benzoevorans will multiply, which will lead to a decrease in the removal rate of ammonia nitrogen . will lead to a decrease in the sulfate removal rate.
与现有技术相比，本发明具有以下优点：Compared with the prior art, the present invention has the following advantages:
（1）解决了烟气脱硫废水使用常规物化方法处理后水质难以达标和可生化性差难以用生物法处理的难题；(1) Solve the problems that the water quality of flue gas desulfurization wastewater treated by conventional physicochemical methods is difficult to reach the standard and the biodegradability is poor and difficult to be treated by biological methods;
（2）将硫酸盐还原成单质硫进行回收，同时将氨氮氧化成氮气，实现了废水中氮、硫的完全无害化处理；(2) The sulfate is reduced to elemental sulfur for recovery, and ammonia nitrogen is oxidized to nitrogen at the same time, which realizes the complete harmless treatment of nitrogen and sulfur in wastewater;
（3）同一行业内脱硫高盐废水和氨氮废水混合处理，达到两种废水在同一生物反应器内实现氮、硫的同步去除，降低废水处理成本，节约能耗。(3) The desulfurization high-salt wastewater and ammonia nitrogen wastewater are mixed in the same industry to achieve simultaneous removal of nitrogen and sulfur in the same bioreactor, reducing wastewater treatment costs and saving energy consumption.
附图说明Description of drawings
图1是本发明的工艺流程图；其中，废水1是烟气脱硫产生的废水，废水2是工业生产过程排放的氨氮废水。Fig. 1 is a process flow diagram of the present invention; wherein, waste water 1 is waste water produced by flue gas desulfurization, and waste water 2 is ammonia nitrogen waste water discharged from an industrial production process.
具体实施方式Detailed ways
下面结合具体实施例对本发明进行进一步说明。The present invention will be further described below with reference to specific embodiments.
本发明中所涉及的生物反应为：2NH4 ++SO4 2-→ N2↑+S+4H2O。含有二氧化硫的烟气经湿法脱硫净化后，产生以硫酸盐为主的脱硫废水。将脱硫废水按一定比例与氨氮废水混合，调整pH和温度后排入生物反应池，在硫酸盐型厌氧氨氧化菌的作用下，微生物以氨氮为电子供体，将硫酸盐还原成单质硫，同时将氨氮氧化成氮气，实现硫、氮的同步去除。重点以实现两种废水中N、S同时去除为目标。The biological reaction involved in the present invention is: 2NH 4 + +SO 4 2- → N 2 ↑+S+4H 2 O. After the flue gas containing sulfur dioxide is purified by wet desulfurization, desulfurization wastewater mainly composed of sulfate is produced. The desulfurization wastewater is mixed with ammonia nitrogen wastewater in a certain proportion, and the pH and temperature are adjusted and then discharged into the biological reaction tank. Under the action of sulfate-type anammox bacteria, the microorganisms use ammonia nitrogen as an electron donor to reduce sulfate to elemental sulfur. At the same time, the ammonia nitrogen is oxidized into nitrogen gas to realize the simultaneous removal of sulfur and nitrogen. The focus is to achieve the simultaneous removal of N and S in the two wastewaters.
本实施例在以本发明技术方案前提下进行实施，给出了详细的实施方式和具体操作过程，但本发明的保护范围不限于下述的实施例。The present embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.
需要指出的是，本发明中活性污泥中各种微生物的百分比含量采用高通量测序技术分析，出现的“20%～30%的Candidatus Kuenenia”、“20～30%的Anammoxo-globus sulfate”及“20～30%的Bacillus benzoevorans”中的百分比是指该微生物种群占体系中微生物总量的百分比。It should be pointed out that in the present invention, the percentage content of various microorganisms in the activated sludge is analyzed by high-throughput sequencing technology, and "20% to 30% of Candidatus Kuenenia " and "20 to 30% of Anammoxo-globus sulfate " appear. And the percentage in "20-30% of Bacillus benzoevorans " refers to the percentage of the microorganism population in the total amount of microorganisms in the system.
实施例1Example 1
河南某化肥厂在生产过程中使用燃煤锅炉提供蒸汽，相应的产生含SO2烟气，烟气经湿式钠法工艺脱硫后，产生含大量Na2SO4的脱硫废水，其浓度约为645mg/L。在氮肥生产过程中产生的氨氮废水，氨氮浓度为160 mg/L。将两种废水经污水泵汇流到一个混合池进行搅拌充分均质，废水混合后NH4 +-N: SO4 2-＝1.7:1（摩尔比）。混合池所控制的主要工艺条件为：pH为7.5，温度为30℃。将的活性污泥接种于生物反应池中，所述活性污泥含有27%的Candidatus Kuenenia、24%的Anammoxo-globus sulfate及23%的Bacillus benzoevorans种群，从混合池中引入含均质的废水，启动生物反应器后，控制水力停留时间为9h，活性污泥的浓度为10g/L。经水质监测分析，出水中氨氮浓度19mg/L，硫酸盐浓度140mg/L，氨氮和硫酸盐的去除率分别为88.1%和78.3%。A chemical fertilizer plant in Henan uses a coal-fired boiler to provide steam in the production process, and accordingly generates flue gas containing SO 2 . After the flue gas is desulfurized by the wet sodium process, desulfurization wastewater containing a large amount of Na 2 SO 4 is produced, and its concentration is about 645mg. /L. The ammonia nitrogen wastewater produced in the nitrogen fertilizer production process has an ammonia nitrogen concentration of 160 mg/L. The two kinds of waste water are merged into a mixing tank through a sewage pump to be stirred and fully homogenized. After the waste water is mixed, NH 4 + -N: SO 4 2- =1.7:1 (molar ratio). The main process conditions controlled by the mixing tank are: pH 7.5 and temperature 30°C. The activated sludge containing 27% Candidatus Kuenenia , 24% Anammoxo-globus sulfate and 23% Bacillus benzoevorans population was inoculated into a biological reaction tank , and homogeneous wastewater was introduced from the mixing tank, After starting the bioreactor, the hydraulic retention time was controlled to be 9h, and the concentration of activated sludge was 10g/L. Through water quality monitoring and analysis, the concentration of ammonia nitrogen in the effluent is 19mg/L, the concentration of sulfate is 140mg/L, and the removal rates of ammonia nitrogen and sulfate are 88.1% and 78.3%, respectively.
实施例2Example 2
某铅锌冶炼企业，在工艺生产过程中，由于有色金属矿石的冶炼产生大量的中低浓度SO2废气，经湿式钠法工艺脱硫后，产生含主要成分为Na2SO4的脱硫废水，其硫酸根浓度为445 mg/L；在其配套的氮肥厂生产硫酸铵过程中，产生大量的高氨氮废水，氨氮浓度约130 mg/L。将两种废水经污水泵汇流到一个混合池进行搅拌充分均质，废水混合后NH4 +:SO4 2-＝2:1（摩尔比）。混合池所控制的主要工艺条件为：pH为8.5，温度为28℃。将活性污泥接种于生物反应池中，所述活性污泥含有26%的Candidatus Kuenenia、24%的Anammoxo- globus sulfate及23%的Bacillus benzoevorans种群，从混合池中引入含均质的废水，启动生物反应器后，控制水力停留时间为9h，活性污泥的浓度为9g/L。经水质监测分析，出水中氨氮浓度17mg/L，硫酸盐浓度86mg/L，氨氮和硫酸盐的去除率分别为87.1%和80.5%。In a lead and zinc smelting enterprise, in the process of production process, due to the smelting of non-ferrous metal ores, a large amount of medium and low concentration SO 2 waste gas is produced. After desulfurization by wet sodium process, desulfurization wastewater containing Na 2 SO 4 is produced. The sulfate concentration is 445 mg/L; in the process of producing ammonium sulfate in its supporting nitrogen fertilizer plant, a large amount of high ammonia nitrogen wastewater is produced, and the ammonia nitrogen concentration is about 130 mg/L. The two kinds of waste water are merged into a mixing tank through a sewage pump to be stirred and fully homogenized. After the waste water is mixed, NH 4 + :SO 4 2- =2:1 (molar ratio). The main process conditions controlled by the mixing tank are: pH 8.5 and temperature 28°C. Activated sludge containing 26% Candidatus Kuenenia , 24% Anammoxo- globus sulfate and 23% Bacillus benzoevorans population was inoculated into a biological reaction tank , and homogeneous wastewater was introduced from the mixing tank to start After the bioreactor, the hydraulic retention time was controlled to be 9h, and the concentration of activated sludge was 9g/L. Through water quality monitoring and analysis, the concentration of ammonia nitrogen in the effluent is 17mg/L, the concentration of sulfate is 86mg/L, and the removal rates of ammonia nitrogen and sulfate are 87.1% and 80.5%, respectively.
实施例3Example 3
某接收含硫废水的污水处理厂，其入厂废水中硫酸根浓度约为130mg/L，氨氮浓度为50 mg/L，NH4 +: SO4 2-＝2.5:1（摩尔比）。反应器所控制的主要工艺条件为：pH为7.5，温度为30℃。将活性污泥接种于生物反应池中，所述活性污泥含有24%的Candidatus Kuenenia、21%的Anammoxo-globus sulfate及20%的Bacillus benzoevorans种群，将模拟废水引入反应器，启动生物反应器后，控制水力停留时间为8h，活性污泥的浓度为8g/L。经水质监测分析，出水中氨氮浓度5 mg/L，硫酸盐浓度30mg/L，氨氮和硫酸盐的去除率分别为90%和77%。In a sewage treatment plant that receives sulfur-containing wastewater, the sulfate concentration in the incoming wastewater is about 130 mg/L, the ammonia nitrogen concentration is 50 mg/L, and NH 4 + : SO 4 2- = 2.5:1 (molar ratio). The main process conditions controlled by the reactor are: pH 7.5 and temperature 30°C. The activated sludge containing 24% Candidatus Kuenenia , 21% Anammoxo-globus sulfate and 20% Bacillus benzoevorans population was inoculated into the bioreactor , and the simulated wastewater was introduced into the reactor. After starting the bioreactor , the hydraulic retention time is controlled to 8h, and the concentration of activated sludge is 8g/L. After water quality monitoring and analysis, the concentration of ammonia nitrogen in the effluent was 5 mg/L, and the concentration of sulfate was 30 mg/L. The removal rates of ammonia nitrogen and sulfate were 90% and 77%, respectively.
实施例4Example 4
某火力发电厂同时使用煤炭和垃圾焚烧发电，由于煤炭中含有的硫在燃烧过程中会产生SO2废气，经湿式钠法工艺脱硫后，产生含主要成分为Na2SO4的脱硫废水，其硫酸根浓度为2000 mg/L；而垃圾渗滤液中含有大量的高氨氮废水，氨氮浓度约450 mg/L。垃圾渗滤液先经厌氧消化后，经污水泵与脱硫废水汇流到一个混合池进行搅拌充分均质，废水混合后NH4 +: SO4 2-＝1.5:1（摩尔比）。混合池所控制的主要工艺条件为：pH为7.8，温度为30℃。将活性污泥接种于生物反应池中，所述活性污泥含有28%的Candidatus Kuenenia、24%的Anammoxo-globus sulfate及23%的Bacillus benzoevorans种群，从混合池中引入含均质的废水，启动生物反应器后，控制水力停留时间为10h，活性污泥的浓度为12g/L。经水质监测分析，出水中氨氮浓度50mg/L，硫酸盐浓度490mg/L，氨氮和硫酸盐的去除率分别为88.9%和75.2%。A thermal power plant uses both coal and waste incineration to generate electricity. Since the sulfur contained in the coal will produce SO 2 waste gas during the combustion process, after desulfurization by the wet sodium process, desulfurization wastewater containing Na 2 SO 4 as the main component will be produced. The sulfate concentration is 2000 mg/L; while the landfill leachate contains a large amount of high ammonia nitrogen wastewater, and the ammonia nitrogen concentration is about 450 mg/L. The landfill leachate is firstly digested by anaerobic digestion, and then the sewage pump and desulfurization wastewater are merged into a mixing tank to be stirred and fully homogenized. After the wastewater is mixed, NH 4 + : SO 4 2- =1.5:1 (molar ratio). The main process conditions controlled by the mixing tank are: pH 7.8 and temperature 30°C. The activated sludge containing 28% Candidatus Kuenenia , 24% Anammoxo-globus sulfate and 23% Bacillus benzoevorans population was inoculated into a biological reaction tank , and homogeneous wastewater was introduced from the mixing tank to start After the bioreactor, the hydraulic retention time was controlled to be 10h, and the concentration of activated sludge was 12g/L. Through water quality monitoring and analysis, the concentration of ammonia nitrogen in the effluent is 50mg/L, the concentration of sulfate is 490mg/L, and the removal rates of ammonia nitrogen and sulfate are 88.9% and 75.2%, respectively.
在其他实施例中，只要满足活性污泥中含有20%～30%的Candidatus Kuenenia、20～30%的Anammoxo-globus sulfate及20～30%的Bacillus benzoevorans均可实现本发明的发明目的。In other embodiments, as long as the activated sludge contains 20%-30% of Candidatus Kuenenia , 20-30% of Anammoxo-globus sulfate and 20-30% of Bacillus benzoevorans can achieve the purpose of the present invention.
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