CN103663725B - Based on Continuous Flow biological denitrification method and the device of granule sludge - Google Patents
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Abstract
本发明公开了基于颗粒污泥的连续流短程硝化-厌氧氨氧化生物脱氮方法及装置，方法包括：1)接种污泥培养，进行活性污泥适应期；2)启动短程硝化-厌氧氨氧化反应；3）厌氧氨氧化颗粒污泥形成和生长期；4）颗粒污泥连续流系统稳定运行期。装置包括设有依序连通的进水水箱、生物反应器、沉淀池和水力筛过滤器；进水水箱进水连通高氨氮废水，出水连通生物反应器；沉淀池底部浓缩污泥经污泥回流泵与生物反应器连通；缺氧反应器内设有固定填料、搅拌器、过滤筛网和与空气压缩机连通的曝气头；沉淀池设有清水溢流口通过管道与水力筛过滤器联通；水力筛过滤器的出水为最终出水，截留的颗粒污泥回流至生物反应器。
The invention discloses a continuous-flow short-path nitrification-anammox biological denitrification method and device based on granular sludge. The method includes: 1) inoculating sludge for cultivation, and performing an adaptation period of activated sludge; 2) starting short-path nitrification-anaerobic Ammoxidation reaction; 3) Anammox granular sludge formation and growth period; 4) Granular sludge continuous flow system stable operation period. The device includes a water inlet tank, a bioreactor, a sedimentation tank and a hydraulic screen filter connected in sequence; the water inlet of the water tank is connected to high ammonia nitrogen wastewater, and the outlet water is connected to the bioreactor; the concentrated sludge at the bottom of the sedimentation tank is refluxed through the sludge The pump is connected with the bioreactor; the anoxic reactor is equipped with fixed packing, agitator, filter screen and aeration head connected with the air compressor; the sedimentation tank is provided with a clear water overflow port and communicated with the hydraulic screen filter through the pipeline ; The effluent of the hydraulic sieve filter is the final effluent, and the intercepted granular sludge is returned to the bioreactor.
Description
技术领域technical field
本发明属于生化法污水处理技术领域，具体是一种利用颗粒污泥为主体的全程自养脱氮技术处理高氨氮废水的方法和装置。该装置以固定填料为载体形成厌氧氨氧化菌生物膜，通过生物膜生长、成熟和脱落，逐渐形成厌氧氨氧化菌颗粒污泥；最终以颗粒污泥为主体，通过氨氧化菌和厌氧氨氧化菌的协同作用，实现经济高效地脱氮。该工艺适用于城市污水处理厂高氨氮消化污泥脱水液处理，也适用于高氨氮、低碳氮比的工业废水处理。The invention belongs to the technical field of biochemical wastewater treatment, and in particular relates to a method and a device for treating high-ammonia-nitrogen wastewater with a full-process autotrophic denitrification technology using granular sludge as the main body. The device uses fixed packing as the carrier to form anammox bacteria biofilm, and through the growth, maturation and shedding of the biofilm, the anammox bacteria granular sludge is gradually formed; finally, the granular sludge is the main body, through the ammonia oxidizing bacteria and anaerobic bacteria. The synergistic effect of ammonium oxidizing bacteria achieves cost-effective denitrification. This process is suitable for the treatment of high ammonia nitrogen digested sludge dehydration liquid in urban sewage treatment plants, and also suitable for the treatment of industrial wastewater with high ammonia nitrogen and low carbon nitrogen ratio.
背景技术Background technique
氮污染物的去除已经成为污水处理和再生回用的关键问题。“十五”后期，氨氮对水质的影响与高锰酸盐指数基本持平，“十一五”前两年氨氮已成为影响地表水质的首要指标。“十二五”期间，氨氮被纳入全国主要水污染物排放约束性控制指标。我国关于氨氮排放标准也日益严格。作为新增的约束性指标，氨氮减排的制度和措施都需在实践中进行探索。通过污水处理厂升级改造，提高生活源氨氮去除效率，同时抓住化工、食品加工等重点行业，可以有效控制氨氮排放总量，较大程度地改善目前水质氨氮超标现象，并减轻湖库氨氮和总氮的负荷。The removal of nitrogen pollutants has become a key issue in wastewater treatment and recycling. In the later period of the "Tenth Five-Year Plan", the impact of ammonia nitrogen on water quality is basically the same as that of permanganate index. In the first two years of the "Eleventh Five-Year Plan", ammonia nitrogen has become the primary indicator affecting surface water quality. During the "Twelfth Five-Year Plan" period, ammonia nitrogen was included in the country's binding control indicators for the discharge of major water pollutants. my country's ammonia nitrogen emission standards are becoming increasingly stringent. As a new binding indicator, the system and measures for ammonia nitrogen emission reduction need to be explored in practice. Through the upgrading and transformation of sewage treatment plants, the removal efficiency of ammonia nitrogen from domestic sources can be improved, and at the same time, the key industries such as chemical industry and food processing can be effectively controlled, the total amount of ammonia nitrogen discharge can be effectively controlled, the phenomenon of excessive ammonia nitrogen in the current water quality can be greatly improved, and the pollution of ammonia nitrogen in lakes and reservoirs can be reduced. total nitrogen load.
目前我国污水中氮污染物的控制仍然存在诸多难题。由于进水水量变化大、工业废水影响、进水固体悬浮物浓度高等因素，我国污水处理工艺氨氮去除效果较低，受季节影响明显。传统的生物脱氮技术一般采用硝化-反硝化工艺，通过硝化菌将氨氮氧化成硝态氮，然后反硝化菌利用有机物将硝态氮还原成氮气。而进水中的有机物缺乏时，传统工艺难以完成良好的反硝化反应，导致总氮去除难以达标。At present, there are still many problems in the control of nitrogen pollutants in sewage in our country. Due to factors such as large changes in influent water volume, influence of industrial wastewater, and high concentration of suspended solids in influent water, the removal effect of ammonia nitrogen in my country's sewage treatment process is low, which is significantly affected by seasons. The traditional biological denitrification technology generally adopts the nitrification-denitrification process. The ammonia nitrogen is oxidized to nitrate nitrogen by nitrifying bacteria, and then the denitrifying bacteria use organic matter to reduce the nitrate nitrogen to nitrogen gas. However, when there is a lack of organic matter in the influent, it is difficult for the traditional process to complete a good denitrification reaction, which makes it difficult to achieve the standard of total nitrogen removal.
传统脱氮工艺操作复杂，运行成本较高。针对传统脱氮工艺中存在的问题，科研人员研发出多种新型的生物脱氮工艺，以期提高生物脱氮的效率，降低其运行成本。厌氧氨氧化生物脱氮技术是众多新技术之一，近年来受到科研工作者和污水处理工艺开发人员的广泛重视。该技术利用厌氧氨氧化菌的特殊代谢途径完成生物脱氮，这种细菌可利用亚硝酸盐作为电子供体直接将氨氮氧化成氮气，因此厌氧氨氧化工艺与传统生物脱氮工艺在氮去除的途径和原理上有显著不同。厌氧氨氧化菌是化能自养菌，以无机碳作为碳源，因此脱氮过程中无需有机碳源；硝化过程只需将50%的氨氮氧化至亚硝酸盐，需氧量和供氧能耗大幅下降；厌氧氨氧化的脱氮效率和去除负荷较高，同时剩余污泥产量少。厌氧氨氧化技术应用于高氨氮废水处理中，可节省运行费用，产生显著的经济效益。同时厌氧氨氧化工艺与传统工艺相比可减少温室气体氧化亚氮的排放，环境效益明显。The traditional denitrification process is complicated to operate and has high operating costs. Aiming at the problems existing in the traditional denitrification process, researchers have developed a variety of new biological denitrification processes in order to improve the efficiency of biological denitrification and reduce its operating costs. Anaerobic ammonium oxidation biological nitrogen removal technology is one of many new technologies, which has been widely valued by scientific researchers and sewage treatment process developers in recent years. This technology uses the special metabolic pathway of anammox bacteria to complete biological denitrification. This kind of bacteria can use nitrite as an electron donor to directly oxidize ammonia nitrogen into nitrogen. The ways and principles of removal are significantly different. Anammox bacteria are chemoautotrophic bacteria that use inorganic carbon as a carbon source, so no organic carbon source is needed in the denitrification process; the nitrification process only needs to oxidize 50% of ammonia nitrogen to nitrite, oxygen demand and oxygen supply The energy consumption is greatly reduced; the denitrification efficiency and removal load of anaerobic ammonium oxidation are high, and the output of residual sludge is small at the same time. The application of anaerobic ammonium oxidation technology in the treatment of high ammonia nitrogen wastewater can save operating costs and produce significant economic benefits. At the same time, the anaerobic ammonium oxidation process can reduce the emission of greenhouse gas nitrous oxide compared with the traditional process, and the environmental benefits are obvious.
厌氧氨氧化技术与传统脱氮工艺相比具有明显的优势，是可持续发展的生物脱氮技术，有着广泛和良好的前景。但是厌氧氨氧化菌属于自养菌，细胞产率低，不容易在短时间内富集。而厌氧氨氧化菌实现生物脱氮需要与氨氧化菌协同完成。而在同一系统内存在的氨氧化菌增殖速率快，导致厌氧氨氧化菌的生长受到影响，难以实现两种细菌的匹配和平衡。另外，反应器内的絮体污泥容易流失，导致厌氧氨氧化菌顺利富集更加困难。为缩短厌氧氨氧化工艺的启动时间，需要强化反应器的污泥持留能力，以促进厌氧氨氧菌的快速富集。通过设计合理的反应器形式和调整运行条件，实现厌氧氨氧化污泥的颗粒化是解决厌氧氨氧化难以富集的方法之一。Compared with the traditional denitrification process, the anaerobic ammonium oxidation technology has obvious advantages. It is a sustainable biological denitrification technology with broad and good prospects. However, anammox bacteria are autotrophic bacteria with low cell productivity and are not easy to enrich in a short period of time. However, anammox bacteria need to cooperate with ammonia oxidizing bacteria to achieve biological denitrification. However, the proliferation rate of ammonia oxidizing bacteria in the same system is fast, which affects the growth of anammox bacteria, making it difficult to achieve the matching and balance of the two bacteria. In addition, the floc sludge in the reactor is easy to lose, which makes it more difficult for the anammox bacteria to enrich smoothly. In order to shorten the start-up time of the anammox process, it is necessary to strengthen the sludge retention capacity of the reactor to promote the rapid enrichment of anammox bacteria. By designing a reasonable reactor form and adjusting the operating conditions, the granulation of anammox sludge is one of the methods to solve the difficult enrichment of anammox.
目前，厌氧氨氧化颗粒污泥工艺仍存在某些技术问题，影响厌氧氨氧化工艺的启动和稳定运行，包括：①颗粒污泥形成的机制仍然不明确，在不接种成熟的厌氧氨氧化颗粒污泥的条件下，系统启动的时间较长；②目前的厌氧氨氧化颗粒污泥主要在UASB反应器或SBR反应器中得以实现，在连续流的反应器中仍较少应用；③目前的厌氧氨氧化颗粒污泥系统，在溶解氧控制方面仍有困难，一般需要间歇曝气维持较低的溶解氧浓度，增加了系统运行的复杂程度。而相关的厌氧氨氧化颗粒污泥专利技术仍缺乏报，尤其是在推流式反应器内形成厌氧氨氧化颗粒污泥的专利技术。综上，本文提出一种新型的利用厌氧氨氧化颗粒污泥处理高氨氮废水的装置和方法，该系统可快速形成颗粒污泥，降低系统运行维护的复杂程度，通过自动控制系统协调不同菌种的相互比例，从而实现系统的高效脱氮和稳定运行。At present, there are still some technical problems in the anammox granular sludge process, which affect the start-up and stable operation of the anammox process, including: ① The mechanism of granular sludge formation is still unclear. Under the condition of oxidized granular sludge, the system start-up time is longer; ②The current anaerobic ammonium oxidation granular sludge is mainly realized in UASB reactor or SBR reactor, and it is still rarely used in continuous flow reactor; ③ The current anaerobic ammonium oxidation granular sludge system still has difficulties in the control of dissolved oxygen. Generally, intermittent aeration is required to maintain a low dissolved oxygen concentration, which increases the complexity of system operation. However, there is still a lack of patented technologies related to anammox granular sludge, especially the patented technology for forming anammox granular sludge in plug-flow reactors. In summary, this paper proposes a new device and method for treating high-ammonia-nitrogen wastewater using anaerobic ammonium oxidation granular sludge. The system can quickly form granular sludge, reduce the complexity of system operation and maintenance, and coordinate different bacteria through an automatic control system. The mutual ratio of species, so as to achieve efficient denitrification and stable operation of the system.
发明内容Contents of the invention
本发明为了解决上述技术问题，提出一种基于厌氧氨氧化颗粒污泥的连续流短程硝化-厌氧氨氧化生物脱氮方法和装置。本发明应用固定填料作为接种污泥，通过生物膜的生长、成熟和脱落促进系统内颗粒污泥的形成；通过设置过滤筛网和水力筛过滤器，提高生物反应器对颗粒污泥的持留能力；从而有效的持留富集厌氧氨氧化菌，增加曝气池中功能微生物的浓度。本发明的生物反应器中同时存在悬浮污泥和颗粒污泥两种污泥形态，可以形成不同的优势菌属，从而将活性污泥法和生物膜法的优点有机的结合起来，可显著提高系统的处理能力和运行稳定性。本发明通过合理的反应器结构和水力流态为不同功能的微生物提供的适宜生长环境，实现厌氧氨氧化工艺的快速启动；通过溶解氧、污泥回流、搅拌强度的在线控制实，提高系统的脱氮效率以及工艺的稳定性。In order to solve the above technical problems, the present invention proposes a continuous-flow short-path nitrification-anammox biological denitrification method and device based on anammox granular sludge. The invention uses fixed packing as inoculation sludge to promote the formation of granular sludge in the system through the growth, maturation and shedding of biofilm; by setting filter screens and hydraulic sieve filters, the retention capacity of bioreactors for granular sludge is improved ; So as to effectively retain and enrich the anammox bacteria and increase the concentration of functional microorganisms in the aeration tank. In the bioreactor of the present invention, there are two sludge forms of suspended sludge and granular sludge at the same time, and different dominant bacterial genera can be formed, thereby organically combining the advantages of the activated sludge method and the biofilm method, which can significantly improve The processing capacity and operation stability of the system. The present invention provides a suitable growth environment for microorganisms with different functions through reasonable reactor structure and hydraulic fluid state, so as to realize the quick startup of the anaerobic ammonium oxidation process; The denitrification efficiency and the stability of the process.
本发明提供的技术方案是：The technical scheme provided by the invention is:
连续流颗粒污泥短程硝化-厌氧氨氧化生物脱氮装置的运行方法，包括以下步骤：The operating method of the continuous flow granular sludge short-path nitrification-anammox biological denitrification device comprises the following steps:
1)接种污泥培养：接种污泥包括活性污泥和生物膜两个部分。生物膜接种过程如下，将聚氨酯固定填料首先浸没在稳定运行的短程硝化-厌氧氨氧化系统，带聚氨酯填料充分吸附系统内活性污泥后，将其转移并固定于生物反应器；活性污泥接种过程如下，从污水处理厂回流污泥管道中取活性污泥混合液，直接注入到生物反应器，并使生物反应器中活性污泥浓度达到3000-5000mg/L；接种污泥过程完成后，将待处理的高氨氮废水通入进水水箱，开启进水泵，使进水水箱中的高氨氮废水进入生物反应器，启动好氧反应器的曝气系统和搅拌系统，氨氮的硝化反应开始进行，控制系统的溶解氧在0.5mg/L，污泥脱水液中的氨氮开始去除；当整个装置的氨氮去除负荷到达0.1kg/(m3·d)，氨氮去除率大于90%，总氮去除率大于50%，出水中的亚硝酸盐浓度占总氮的比例大于85%时，确认活性污泥适应期结束，进行下一步骤；1) Inoculation sludge cultivation: Inoculation sludge includes two parts: activated sludge and biofilm. The biofilm inoculation process is as follows. The polyurethane fixed filler is first immersed in a stable short-range nitrification-anammox system. After the polyurethane filler fully absorbs the activated sludge in the system, it is transferred and fixed in the bioreactor; the activated sludge The inoculation process is as follows. Take the activated sludge mixture from the return sludge pipeline of the sewage treatment plant, inject it directly into the bioreactor, and make the activated sludge concentration in the bioreactor reach 3000-5000mg/L; after the inoculation sludge process is completed , pass the high ammonia nitrogen wastewater to be treated into the water inlet tank, turn on the water inlet pump, make the high ammonia nitrogen wastewater in the water inlet tank enter the bioreactor, start the aeration system and stirring system of the aerobic reactor, and the nitrification reaction of ammonia nitrogen begins When the dissolved oxygen in the control system is 0.5mg/L, the ammonia nitrogen in the sludge dehydration liquid begins to be removed; when the ammonia nitrogen removal load of the whole device reaches 0.1kg/(m 3 ·d), the ammonia nitrogen removal rate is greater than 90%, and the total nitrogen When the removal rate is greater than 50%, and the concentration of nitrite in the effluent accounts for more than 85% of the total nitrogen, confirm that the adaptation period of the activated sludge is over and proceed to the next step;
2)启动短程硝化-厌氧氨氧化反应：保持开启进水泵，从进水水箱中连续进水到生物反应器；保持开启曝气系统，同时通过在线溶解氧检测系统和相应的曝气管路空气流量的控制，保持溶解氧的基本稳定为0.2-0.3mg/L，污泥回流比设为50%-100%；通过控制曝气和搅拌的强度，保证悬浮污泥在缺氧、好氧反应区充分混合，不出现短流或死区；监测沉淀池清水溢流口出水中的氨氮浓度，当出水浓度低于50mg/L时，提高生物反应器的进水量，并调整曝气系统曝气强度和调整搅拌器的搅拌强度，以保证各反应器中泥水充分混合；在提高进水水量的过程中，监测出水中亚硝酸盐浓度的变化，当出水中亚硝酸浓度高于1mg/L时，保持进水水量不变，并适当降低系统的溶解氧浓度，保证系统出水的亚硝酸盐浓度低于1mg/L。在上述条件下运行，逐渐提高反应器的进水量，当反应器的总氮去除负荷达到0.8kg/(m3·d)，总氮去除率超过75%，同时聚氨酯固定填料上生长出超过1mm厚度的红色生物膜时，确定短程硝化-厌氧氨氧化过程启动结束，进入下一步骤；2) Start the short-range nitrification-ANAMMOX reaction: keep the water inlet pump turned on, and continuously feed water from the water inlet tank to the bioreactor; keep the aeration system turned on, and pass the online dissolved oxygen detection system and the corresponding aeration pipeline at the same time The control of air flow keeps the dissolved oxygen basically stable at 0.2-0.3mg/L, and the sludge reflux ratio is set at 50%-100%; by controlling the intensity of aeration and stirring, it is ensured that the suspended sludge is in anoxic and aerobic conditions. The reaction zone is fully mixed, and there is no short flow or dead zone; monitor the concentration of ammonia nitrogen in the effluent of the clear water overflow of the sedimentation tank, and when the effluent concentration is lower than 50mg/L, increase the water intake of the bioreactor and adjust the aeration system Air intensity and adjust the stirring intensity of the agitator to ensure that the mud and water in each reactor are fully mixed; in the process of increasing the influent water volume, monitor the change of the nitrite concentration in the effluent, when the nitrite concentration in the effluent is higher than 1mg/L , keep the amount of influent water unchanged, and properly reduce the dissolved oxygen concentration of the system to ensure that the nitrite concentration of the system effluent is lower than 1mg/L. Operate under the above conditions and gradually increase the water intake of the reactor. When the total nitrogen removal load of the reactor reaches 0.8kg/(m 3 ·d), the total nitrogen removal rate exceeds 75%, and at the same time, more than 1mm grows on the polyurethane fixed filler. When the red biofilm is thick, it is determined that the short-range nitrification-anammox process has started and ended, and enters the next step;
3）厌氧氨氧化颗粒污泥形成和生长期：通过调整曝气管路的阀门，提高系统的曝气量，该阶段生物反应器的溶解氧浓度维持在0.5-0.8mg/L；通过将固定填料底部的曝气量增加，提高填料表面的水力剪切力，将固定填料表面形成的颗粒状红色生物膜洗脱至反应器。混合液经过孔眼直径为0.5mm的过滤筛网溢流进入沉淀池，粒径大于0.5mm的颗粒污泥可被截留在反应器内。过滤筛网每日用出水清洗一次，避免堵塞，影响系统的正常运行。开启水力筛过滤器，筛网粒径选择0.18mm，出水中含有的粒径超过0.18mm的污泥可被截留，并通过污泥回流系统重新进入到生物反应器的前端。调整每日剩余污泥排放的量在系统污泥总量的10%-15%；系统排泥过程如下，关闭出水阀门，打开混合液排泥阀门，混合液进入到水力筛过滤器，截留的颗粒通过污泥回流系统回流至生物反应器，未被截留的混合液作为剩余污泥直接排放。3) Anammox granular sludge formation and growth period: By adjusting the valve of the aeration pipeline, the aeration volume of the system is increased, and the dissolved oxygen concentration of the bioreactor is maintained at 0.5-0.8mg/L at this stage; The aeration at the bottom of the fixed packing is increased to increase the hydraulic shear force on the surface of the packing, and the granular red biofilm formed on the surface of the fixed packing is eluted to the reactor. The mixed solution overflows into the sedimentation tank through the filter screen with a hole diameter of 0.5mm, and the granular sludge with a particle size larger than 0.5mm can be trapped in the reactor. The filter screen is washed with water once a day to avoid clogging and affect the normal operation of the system. Turn on the hydraulic sieve filter, select the mesh size of 0.18mm, and the sludge contained in the effluent with a particle size exceeding 0.18mm can be intercepted and re-enter the front end of the bioreactor through the sludge return system. Adjust the amount of daily residual sludge discharge to 10%-15% of the total sludge in the system; the sludge discharge process of the system is as follows: close the water outlet valve, open the mixed liquid sludge discharge valve, the mixed liquid enters the hydraulic screen filter, and the retained The particles are returned to the bioreactor through the sludge return system, and the unretained mixed solution is discharged directly as excess sludge.
4）颗粒污泥连续流系统稳定运行期；保持系统正常运行，颗粒污泥的质量占系统总污泥质量超过50%时，将聚氨酯固定填料取出作为其他反应器启动的接种污泥备用，本系统以颗粒污泥为主体完成全程自养脱氮。定期监测沉淀池出水中的亚硝酸盐浓度，适当调整系统的溶解氧浓度，保证设计的总氮去除负荷和总氮去除率，系统调试结束，进入到正常运行期。4) During the stable operation period of the granular sludge continuous flow system; to maintain the normal operation of the system, when the mass of the granular sludge accounts for more than 50% of the total sludge mass of the system, the polyurethane fixed filler is taken out and used as the inoculation sludge for other reactors for standby use. The system uses granular sludge as the main body to complete the whole process of autotrophic denitrification. Regularly monitor the nitrite concentration in the effluent of the sedimentation tank, properly adjust the dissolved oxygen concentration of the system, and ensure the designed total nitrogen removal load and total nitrogen removal rate. After the system debugging is completed, it enters the normal operation period.
本发明的运行工艺原理：聚氨酯填料首先浸没在已经稳定运行的短程硝化-厌氧氨氧化反应器中，利用聚氨酯填料比表面积大的特点吸附部分厌氧氨氧化活性污泥。将聚氨酯填料固定于生物反应器后，通过调节曝气强度和进水水量维持溶解氧在0.2-0.3mg/L。在该运行条件下，厌氧氨氧化菌可以逐渐增殖并形成成熟厌氧氨氧化菌生物膜。生物膜进一步增殖后，在表面形成颗粒状的突起。这些突起在曝气和水力剪切力的作用下脱落进入到反应器内，以颗粒污泥的形式存在，从而增加了系统内厌氧氨氧化菌的丰度，进一步提高了系统的脱氮效率。The operating process principle of the present invention: the polyurethane filler is first immersed in the short-range nitrification-anammox reactor that has been running stably, and the polyurethane filler has a large specific surface area to absorb part of the anammox activated sludge. After the polyurethane filler is fixed in the bioreactor, the dissolved oxygen is maintained at 0.2-0.3 mg/L by adjusting the aeration intensity and the influent water volume. Under these operating conditions, anammox bacteria can gradually proliferate and form a mature anammox bacteria biofilm. After the biofilm proliferates further, granular protrusions are formed on the surface. These protrusions fall off and enter the reactor under the action of aeration and hydraulic shear force, and exist in the form of granular sludge, thereby increasing the abundance of anammox bacteria in the system and further improving the nitrogen removal efficiency of the system .
反应器将进水、回流污泥和反应器内的悬浮活性污泥、颗粒污泥均匀混合。空气压缩机为生物反应器曝气。系统内的氨氮在悬浮污泥中的氨氧化菌作用下氧化成亚硝酸盐，颗粒污泥富集的厌氧氨氧化菌利用剩余的氨氮将亚硝酸盐还原成氮气，从而实现脱氮。生物反应器的溶解氧通过溶解氧监测仪监测，通过调节曝气管路上转子流量计维持溶解氧适宜的浓度，保证系统有足够的亚硝酸盐作为厌氧氨氧化生长的基质，同时不产生积累。The reactor uniformly mixes influent water, return sludge, suspended activated sludge and granular sludge in the reactor. An air compressor aerates the bioreactor. The ammonia nitrogen in the system is oxidized to nitrite under the action of the ammonia oxidizing bacteria in the suspended sludge, and the anammox bacteria enriched in the granular sludge use the remaining ammonia nitrogen to reduce the nitrite to nitrogen, thereby realizing denitrification. The dissolved oxygen in the bioreactor is monitored by the dissolved oxygen monitor, and the appropriate concentration of dissolved oxygen is maintained by adjusting the rotameter on the aeration pipeline to ensure that the system has enough nitrite as the substrate for the growth of anammox without accumulation .
好氧反应器的泥水混合物经过0.5mm孔径的筛网进入到沉淀池，粒径大于0.5mm的颗粒可被截留在生物反应器内。沉淀池通过重力作用进行泥水分离，上清液进入到水力筛过滤器，污泥沉淀在底部的污泥斗，经污泥回流泵提升至生物反应器。水力筛过滤器的孔径选择0.18mm，粒径大于0.18mm的颗粒被截留重新回流至生物反应器，而滤后水作为最终出水。剩余污泥排放也通过水力筛过滤器完成，将混合液直接进入到水力筛过滤器，截留的颗粒污泥回流至生物反应器，粒径小于0.18mm的混合液作为剩余污泥排放。The mud-water mixture from the aerobic reactor enters the sedimentation tank through a screen with a pore size of 0.5 mm, and particles with a particle size larger than 0.5 mm can be trapped in the bioreactor. The sedimentation tank separates mud and water by gravity, the supernatant enters the hydraulic screen filter, and the sludge settles in the sludge bucket at the bottom, and is lifted to the bioreactor by the sludge return pump. The pore size of the hydraulic sieve filter is 0.18mm, and the particles with a particle size larger than 0.18mm are trapped and returned to the bioreactor, and the filtered water is used as the final effluent. The discharge of excess sludge is also completed through the hydraulic sieve filter, the mixed liquid directly enters the hydraulic sieve filter, the intercepted granular sludge is returned to the bioreactor, and the mixed liquid with a particle size of less than 0.18mm is discharged as excess sludge.
基于前述工艺运行原理和具体方法，本发明提供了基于颗粒污泥的连续流短程硝化-厌氧氨氧化生物脱氮装置，具体包括：Based on the aforementioned process operation principles and specific methods, the present invention provides a continuous-flow short-path nitrification-anammox biological denitrification device based on granular sludge, which specifically includes:
设有依序连通的用以储存高氨氮、低碳氮比废水的进水水箱、生物反应器、沉淀池和水力筛过滤器；待处理高氨氮废水通过进水口与所述进水水箱相连接，进水水箱的出水口通过进水泵与生物反应器的进水口连通；生物反应器的混合液依次经过滤筛网、溢流堰，通过管道和阀门与沉淀池的中心筒连通；沉淀池完成泥水分离后，底部浓缩污泥通过污泥回流泵经污泥回流管路与生物反应器始端连通，上清液经沉淀池上部的清水溢流口通过管道与水力筛过滤器连接；水力筛过滤器二次固液分离后，滤后水作为最终出水排放，截留的污泥经污泥回流泵回流至生物反应器。生物反应器设有排泥管和阀门，排泥管与水力筛过滤器相连接。系统排泥时混合液进入水力筛过滤器，截留的固体通过污泥回流系统回流至生物反应器，过滤后的混合液作为剩余污泥排放。生物反应器的前端内设有板式聚氨酯固定填料，后端设有溶解氧监测仪和液下搅拌器；生物反应器的底部设有曝气头，曝气头与空气压缩机连通，空气压缩机的曝气管路上设有气体流量计。There are sequentially connected water inlet tanks, bioreactors, sedimentation tanks and hydraulic screen filters for storing high ammonia nitrogen and low carbon nitrogen ratio wastewater; the high ammonia nitrogen wastewater to be treated is connected to the water inlet tank through the water inlet , the water outlet of the water inlet tank is connected with the water inlet of the bioreactor through the water inlet pump; the mixed solution of the bioreactor passes through the filter screen, the overflow weir in turn, and communicates with the central cylinder of the sedimentation tank through pipes and valves; the sedimentation tank is completed After the separation of mud and water, the concentrated sludge at the bottom is connected to the beginning of the bioreactor through the sludge return pump through the sludge return pipeline, and the supernatant is connected to the hydraulic screen filter through the clear water overflow port on the upper part of the sedimentation tank through the pipeline; the hydraulic screen filter After the secondary solid-liquid separation of the reactor, the filtered water is discharged as the final effluent, and the retained sludge is returned to the bioreactor through the sludge return pump. The bioreactor is provided with a mud discharge pipe and a valve, and the mud discharge pipe is connected with a hydraulic sieve filter. When the system discharges sludge, the mixed solution enters the hydraulic sieve filter, and the retained solids return to the bioreactor through the sludge return system, and the filtered mixed solution is discharged as excess sludge. The front end of the bioreactor is equipped with a plate-type polyurethane fixed packing, and the rear end is equipped with a dissolved oxygen monitor and a submerged stirrer; the bottom of the bioreactor is equipped with an aeration head, which is connected to an air compressor, and the air compressor There is a gas flow meter on the aeration pipeline.
进一步完善和实施的补充方案是：Complementary programs for further refinement and implementation are:
所述曝气管路上的气体流量计为在线气体流量计，所述反应器的溶解氧监测仪为在线溶解氧监测仪；所述进水泵和液下搅拌器电机、空气压缩机、污泥回流泵均设有可控变频器，并设有PLC控制器，该PLC控制器与所述在线溶解氧监测仪和气体流量计进行信号连接，并与所述进水泵和空气压缩机、污泥回流泵、搅拌器电机进行控制连接。The gas flow meter on the aeration pipeline is an online gas flow meter, and the dissolved oxygen monitor of the reactor is an online dissolved oxygen monitor; the water inlet pump and submerged agitator motor, air compressor, sludge return The pumps are all equipped with a controllable frequency converter and a PLC controller, which is connected to the online dissolved oxygen monitor and gas flow meter for signal connection, and is connected to the water inlet pump, air compressor, and sludge return flow. Pump, agitator motors are connected for control.
与传统的高氨氮污水处理工艺和常规的厌氧氨氧化脱氮处理工艺等现有技术相比，本发明具有如下优点：Compared with existing technologies such as traditional high ammonia nitrogen sewage treatment process and conventional anammox denitrification process, the present invention has the following advantages:
1）本发明通过生物膜的接种和培育，可实现厌氧氨氧化颗粒污泥系统的快速启动。在本系统中，固定填料为厌氧氨氧化菌富集提供适宜的环境，避免污泥絮体中过高的溶解氧对厌氧氨氧化菌的抑制作用，因此颗粒污泥可通过污泥生物膜的快速增殖和逐渐脱落而稳定形成。该种颗粒污泥造粒方式，不需要特殊的水力条件筛选和絮凝剂投加，降低了颗粒污泥启动和运行的技术门槛；1) The present invention can realize the rapid start-up of the anammox granular sludge system through the inoculation and cultivation of the biofilm. In this system, the fixed filler provides a suitable environment for the enrichment of anammox bacteria, and avoids the inhibitory effect of excessively high dissolved oxygen in the sludge flocs on anammox bacteria, so the granular sludge can pass through the sludge biological The rapid proliferation and gradual shedding of the membrane leads to stable formation. This granular sludge granulation method does not require special hydraulic condition screening and flocculant dosing, which reduces the technical threshold for the start-up and operation of granular sludge;
2）本发明为不同的功能菌属提供适宜的生长条件。利用悬浮活性污泥为氨氧化菌生长提供充足的溶解氧等适宜的生长条件，可提高系统的氨氧化活性；通过颗粒污泥的长污泥龄可实现厌氧氨氧化菌的富集，提高系统的厌氧氨氧化活性。系统中絮体污泥和颗粒污泥的共存，有利于两种功能菌充分发挥各自的活性，提高系统整理的脱氮效率。2) The present invention provides suitable growth conditions for different functional fungi. The use of suspended activated sludge to provide sufficient dissolved oxygen and other suitable growth conditions for the growth of ammonia oxidizing bacteria can improve the ammonia oxidation activity of the system; through the long sludge age of granular sludge, the enrichment of anammox bacteria can be realized and the improvement can be achieved. Anammox activity of the system. The coexistence of floc sludge and granular sludge in the system is conducive to the two kinds of functional bacteria to give full play to their respective activities and improve the denitrification efficiency of system finishing.
3)本发明利用筛网和水力筛过滤器实现了功能菌选择性富集，提高了系统运行的稳定性。剩余污泥排放时，水力筛过滤器可实现不同粒径的污泥的分离，从而选择性的将富含氨氧化菌的小粒径污泥排放，而颗粒污泥通过筛网和水力筛过滤器充分持留，有利于厌氧氨氧化活性的提高。污泥的选择性排放也有利于系统两种功能细菌的活性调控，降低了系统运行的复杂程度。3) The present invention utilizes the sieve and hydraulic sieve filter to realize the selective enrichment of functional bacteria and improve the stability of the system operation. When the remaining sludge is discharged, the hydraulic sieve filter can realize the separation of sludge with different particle sizes, so as to selectively discharge the small particle size sludge rich in ammonia oxidizing bacteria, while the granular sludge is filtered through the screen and hydraulic sieve The device is fully retained, which is conducive to the improvement of anammox activity. The selective discharge of sludge is also conducive to the regulation of the activity of the two functional bacteria in the system, which reduces the complexity of the system operation.
4）本发明将颗粒污泥与连续流反应器相结合，拓宽了颗粒污泥的应用范围。在连续流和推流式的反应器中稳步形成颗粒污泥，扩展了颗粒污泥的应用范围，有利于该项技术的推广应用。而且该技术不需要长期使用固定填料，可降低系统的基础投资。4) The present invention combines granular sludge with a continuous flow reactor, broadening the application range of granular sludge. The granular sludge is steadily formed in the continuous flow and plug-flow reactors, which expands the application range of the granular sludge and is conducive to the popularization and application of this technology. Moreover, this technology does not require long-term use of fixed packing, which can reduce the basic investment of the system.
附图说明Description of drawings
图1为本发明装置的结构示意图；Fig. 1 is the structural representation of device of the present invention;
图1中：1——进水水箱；2——进水泵；3——生物反应器；4——沉淀池；5——水力筛过滤器；6——过滤筛网；7——溢流堰；8——污泥回流泵；9——溢流口；10——阀门；11——固定填料；12——溶解氧监测仪；13——搅拌器；14——空气压缩机；15——气体流量计；In Figure 1: 1—inlet water tank; 2—inlet pump; 3—bioreactor; 4—sedimentation tank; 5—hydraulic screen filter; 6—filter screen; 7—overflow Weir; 8—sludge return pump; 9—overflow port; 10—valve; 11—fixed packing; 12—dissolved oxygen monitor; 13—agitator; 14—air compressor; 15 --Barometer;
图2为本发明装置的平面示意图。Fig. 2 is a schematic plan view of the device of the present invention.
具体实施方式Detailed ways
下面结合附图和实施方式对本发明做进一步的说明：如图1所示，基于颗粒污泥的连续流短程硝化-厌氧氨氧化生物脱氮装置，依序连通的用以储存高氨氮、低碳氮比废水的进水水箱1、生物反应器3、沉淀池4和水力筛过滤器5；待处理高氨氮废水通过进水口与进水水箱1相连接，进水水箱1的出水口通过进水泵2与生物反应器3的进水口连通；生物反应器3的混合液依次经过滤筛网6、溢流堰7，通过管道和阀门与沉淀池4的中心筒连通；沉淀池4完成泥水分离后，底部浓缩污泥通过污泥回流泵8经污泥回流管路与生物反应器3始端连通，上清液经沉淀池4上部的清水溢流口9通过管道与水力筛过滤器5连接；水力筛过滤器5二次固液分离后，滤后水作为最终出水排放，截留的污泥经污泥回流泵8回流至生物反应器3。The present invention will be further described below in conjunction with accompanying drawings and embodiments: As shown in Figure 1, the continuous flow short-path nitrification-anammox biological denitrification device based on granular sludge is sequentially connected to store high ammonia nitrogen, low Inlet water tank 1, bioreactor 3, sedimentation tank 4 and hydraulic sieve filter 5 for waste water with carbon-to-nitrogen ratio; high ammonia nitrogen waste water to be treated is connected to water inlet water tank 1 through the water inlet, and the water outlet of water inlet water tank 1 passes through the water inlet The water pump 2 communicates with the water inlet of the bioreactor 3; the mixed liquid of the bioreactor 3 passes through the filter screen 6 and the overflow weir 7 in turn, and communicates with the central cylinder of the sedimentation tank 4 through pipes and valves; the sedimentation tank 4 completes the separation of mud and water Finally, the concentrated sludge at the bottom is connected to the beginning of the bioreactor 3 through the sludge return pump 8 through the sludge return pipeline, and the supernatant is connected to the hydraulic screen filter 5 through the clear water overflow port 9 on the upper part of the sedimentation tank 4 through the pipeline; After the secondary solid-liquid separation of the hydraulic sieve filter 5, the filtered water is discharged as the final effluent, and the retained sludge is returned to the bioreactor 3 through the sludge return pump 8.
生物反应器3设有排泥管和阀门10，排泥管与水力筛过滤器5相连接。系统排泥时混合液进入到水力筛过滤器5，截留的固体通过污泥回流管路回流至生物反应器3，过滤后的混合液作为剩余污泥排放。The bioreactor 3 is provided with a mud discharge pipe and a valve 10, and the mud discharge pipe is connected with the hydraulic screen filter 5. When the system discharges sludge, the mixed solution enters the hydraulic screen filter 5, and the retained solids flow back to the bioreactor 3 through the sludge return pipeline, and the filtered mixed solution is discharged as excess sludge.
生物反应器3的前端内设有板式聚氨酯固定填料11，后端设有在线溶解氧监测仪12和液下搅拌器13；生物反应器3的底部设有曝气头，曝气头与空气压缩机14连通，空气压缩机的曝气管路上设有在线气体流量计15。其中，进水泵2和液下搅拌器13电机、空气压缩机14、污泥回流泵8均设有可控变频器，并设有PLC控制器，该PLC控制器与在线溶解氧监测仪12和气体流量计15进行信号连接，并与进水泵2和空气压缩机14、污泥回流泵8、搅拌器13电机进行控制连接。The front end of the bioreactor 3 is provided with a plate-type polyurethane fixed packing 11, and the rear end is provided with an online dissolved oxygen monitor 12 and a submerged stirrer 13; Machine 14 communicates, and the aeration pipeline of air compressor is provided with on-line gas flowmeter 15. Among them, the water inlet pump 2, the motor of the submerged agitator 13, the air compressor 14, and the sludge return pump 8 are all equipped with controllable frequency converters, and are equipped with a PLC controller. The PLC controller is connected with the online dissolved oxygen monitor 12 and The gas flowmeter 15 is connected for signal, and is connected for control with the water inlet pump 2, the air compressor 14, the sludge return pump 8, and the agitator 13 motor.
结合上述的脱氮装置，基于污泥颗粒连续流的短程硝化-厌氧氨氧化生物脱氮方法包括以下步骤：In combination with the above-mentioned denitrification device, the short-path nitrification-anammox biological denitrification method based on the continuous flow of sludge particles includes the following steps:
1)接种污泥培养：接种污泥包括活性污泥和生物膜两个部分。生物膜接种过程如下，将聚氨酯固定填料首先浸没在稳定运行的短程硝化-厌氧氨氧化系统，带聚氨酯填料充分吸附系统内活性污泥后，将其转移并固定于生物反应器；活性污泥接种过程如下，从污水处理厂回流污泥管道中取活性污泥混合液，直接注入到生物反应器，并使生物反应器中活性污泥浓度达到3000-5000mg/L；接种污泥过程完成后，将待处理的高氨氮废水通入进水水箱，开启进水泵，使进水水箱中的高氨氮废水进入生物反应器，启动好氧反应器的曝气系统和搅拌系统，氨氮的硝化反应开始进行，控制系统的溶解氧在0.5mg/L，污泥脱水液中的氨氮开始去除；当整个装置的氨氮去除负荷到达0.1kg/(m3·d)，氨氮去除率大于90%，总氮去除率大于50%，出水中的亚硝酸盐浓度占总氮的比例大于85%时，确认活性污泥适应期结束，进行下一步骤；1) Inoculation sludge cultivation: Inoculation sludge includes two parts: activated sludge and biofilm. The biofilm inoculation process is as follows. The polyurethane fixed filler is first immersed in a stable short-range nitrification-anammox system. After the polyurethane filler fully absorbs the activated sludge in the system, it is transferred and fixed in the bioreactor; the activated sludge The inoculation process is as follows. Take the activated sludge mixture from the return sludge pipeline of the sewage treatment plant, inject it directly into the bioreactor, and make the activated sludge concentration in the bioreactor reach 3000-5000mg/L; after the inoculation sludge process is completed , pass the high ammonia nitrogen wastewater to be treated into the water inlet tank, turn on the water inlet pump, make the high ammonia nitrogen wastewater in the water inlet tank enter the bioreactor, start the aeration system and stirring system of the aerobic reactor, and the nitrification reaction of ammonia nitrogen starts When the dissolved oxygen in the control system is 0.5mg/L, the ammonia nitrogen in the sludge dehydration liquid starts to be removed; when the ammonia nitrogen removal load of the whole device reaches 0.1kg/(m 3 ·d), the ammonia nitrogen removal rate is greater than 90%, and the total nitrogen When the removal rate is greater than 50%, and the concentration of nitrite in the effluent accounts for more than 85% of the total nitrogen, confirm that the adaptation period of the activated sludge is over and proceed to the next step;
2)启动短程硝化-厌氧氨氧化反应：保持开启进水泵，从进水水箱中连续进水到生物反应器；保持开启曝气系统，同时通过在线溶解氧检测系统和相应的曝气管路空气流量的控制，保持溶解氧基本稳定为0.2-0.3mg/L，污泥回流比设为50%-100%；通过控制曝气和搅拌的强度，保证悬浮污泥在缺氧、好氧反应区充分混合，不出现短流和死区；监测沉淀池清水溢流口出水中的氨氮浓度，当出水浓度低于50mg/L时，提高生物反应器的进水量，并调整曝气系统曝气强度和搅拌器的搅拌强度，以保证各反应器中泥水充分混合；在提高进水水量的过程中，监测出水中亚硝酸盐浓度的变化，当出水中亚硝酸浓度高于1mg/L时，保持进水水量不变，并适当降低系统的溶解氧浓度，保证系统出水的亚硝酸盐浓度低于1mg/L。在上述条件下运行，逐渐提供反应器的进水水量，当反应器的总氮去除负荷达到0.8kg/(m3·d)，总氮去除率超过75%，同时聚氨酯固定填料上生长出超过1mm厚度的红色生物膜时，确定短程硝化-厌氧氨氧化过程启动结束，进入下一步骤；2) Start the short-range nitrification-ANAMMOX reaction: keep the water inlet pump turned on, and continuously feed water from the water inlet tank to the bioreactor; keep the aeration system turned on, and pass the online dissolved oxygen detection system and the corresponding aeration pipeline at the same time Control the air flow, keep the dissolved oxygen basically stable at 0.2-0.3mg/L, and set the sludge reflux ratio at 50%-100%; by controlling the intensity of aeration and stirring, ensure that the suspended sludge reacts in anoxic and aerobic conditions The zone is fully mixed without short flow and dead zone; monitor the concentration of ammonia nitrogen in the effluent of the clear water overflow of the sedimentation tank, and when the effluent concentration is lower than 50mg/L, increase the water intake of the bioreactor and adjust the aeration of the aeration system Intensity and stirring intensity of the agitator to ensure that the muddy water in each reactor is fully mixed; in the process of increasing the influent water volume, monitor the change of the nitrite concentration in the effluent, when the nitrite concentration in the effluent is higher than 1mg/L, Keep the influent water volume constant, and appropriately reduce the dissolved oxygen concentration of the system to ensure that the nitrite concentration of the system effluent is lower than 1mg/L. Operated under the above conditions, the water inflow to the reactor is gradually provided. When the total nitrogen removal load of the reactor reaches 0.8kg/(m 3 d), the total nitrogen removal rate exceeds 75%, and at the same time more than When there is a red biofilm with a thickness of 1 mm, it is determined that the short-range nitrification-anammox process has started and ended, and enters the next step;
3）厌氧氨氧化颗粒污泥形成和生长期：通过调整曝气管路的阀门，提高系统的曝气量，该阶段生物反应器的溶解氧浓度维持在0.5-0.8mg/L；通过将固定填料底部的曝气量增加，提高填料表面的水力剪切力，将固定填料表面形成的颗粒状红色生物膜洗脱至反应器。混合液经过孔眼直径为0.5mm的过滤筛网溢流进入沉淀池，粒径大于0.5mm的颗粒污泥可被截留在反应器内。过滤筛网每日用出水清洗一次，避免堵塞，影响系统的正常运行。开启水力筛过滤器，筛网粒径选择0.18mm，出水中含有的粒径超过0.18mm的污泥可被截留，并通过污泥回流系统重新进入到生物反应器的前端。调整每日剩余污泥排放量在系统污泥总量的10%-15%；系统排泥过程如下，关闭出水阀门，打开混合液排泥阀门，混合液进入到水力筛过滤器，截留的颗粒通过污泥回流系统回流至生物反应器，未被截留的混合液作为剩余污泥直接排放。3) Anammox granular sludge formation and growth period: By adjusting the valve of the aeration pipeline, the aeration volume of the system is increased, and the dissolved oxygen concentration of the bioreactor is maintained at 0.5-0.8mg/L at this stage; The aeration at the bottom of the fixed packing is increased to increase the hydraulic shear force on the surface of the packing, and the granular red biofilm formed on the surface of the fixed packing is eluted to the reactor. The mixed solution overflows into the sedimentation tank through the filter screen with a hole diameter of 0.5mm, and the granular sludge with a particle size larger than 0.5mm can be trapped in the reactor. The filter screen is washed with water once a day to avoid clogging and affect the normal operation of the system. Turn on the hydraulic sieve filter, select the mesh size of 0.18mm, and the sludge contained in the effluent with a particle size exceeding 0.18mm can be intercepted and re-enter the front end of the bioreactor through the sludge return system. Adjust the daily residual sludge discharge to 10%-15% of the total sludge in the system; the system sludge discharge process is as follows, close the outlet valve, open the mixed liquid sludge discharge valve, the mixed liquid enters the hydraulic sieve filter, and the retained particles Return to the bioreactor through the sludge return system, and the uninterrupted mixed solution is discharged directly as excess sludge.
4）颗粒污泥连续流系统稳定运行期；保持系统正常运行，颗粒污泥的质量占系统污泥总质量超过50%时，将聚氨酯固定填料取出作为其他反应器启动的接种污泥备用，本系统以颗粒污泥为主体完成全程自养脱氮。定期监测沉淀池出水中的亚硝酸盐浓度，适当调整系统的溶解氧浓度，保证设计的总氮去除负荷和总氮去除率，系统调试结束，进入到正常运行期。4) During the stable operation period of the granular sludge continuous flow system; keep the system running normally, and when the mass of the granular sludge accounts for more than 50% of the total mass of the system sludge, the polyurethane fixed filler is taken out and used as the inoculated sludge for other reactors for standby use. The system uses granular sludge as the main body to complete the whole process of autotrophic denitrification. Regularly monitor the nitrite concentration in the effluent of the sedimentation tank, properly adjust the dissolved oxygen concentration of the system, and ensure the designed total nitrogen removal load and total nitrogen removal rate. After the system debugging is completed, it enters the normal operation period.
本实施例的基于颗粒污泥连续流的脱氮装置在某大型污水处理厂中设置，与原有污水处理装置的污泥脱水间污泥脱水液排放管道连接；有效容积为10m3，使用的进水为高氨氮污泥脱水液，进水氨氮浓度410-450mg/L，总氮450-480mg/L，COD=200-240mg/L，pH=7.4-8.2；使用前贮存在进水水箱。The denitrification device based on the continuous flow of granular sludge in this embodiment is installed in a large sewage treatment plant, and is connected to the sludge dehydration liquid discharge pipeline in the sludge dehydration room of the original sewage treatment plant; the effective volume is 10m 3 , and the used The influent is high ammonia nitrogen sludge dehydration liquid, the influent ammonia nitrogen concentration is 410-450mg/L, the total nitrogen is 450-480mg/L, COD=200-240mg/L, pH=7.4-8.2; it is stored in the influent water tank before use.
运行到第4）步，正常运行3个月，试验结果表明：生物反应器的温度为28-30℃，进水总氮浓度为450～480mg/L，水力停留时间20h，悬浮污泥平均固体停留时间8天，颗粒污泥平均固体停留时间30天，稳定运行阶段系统内颗粒污泥的质量占活性污泥总质量的50%，经分子生物学鉴定证明颗粒污泥中，厌氧氨氧化菌得到有效的富集；该实施例的装置与工艺与传统硝化-反硝化工艺相比，在不投加外碳源的情况下，总氮去除率提高到90%，总氮去除负荷达到0.8kg/(m3·d)。而且厌氧氨氧化颗粒污泥工艺的启动缩短至3个月，有利于该工艺在实际工程中的推广应用。Run to step 4) and run normally for 3 months. The test results show that: the temperature of the bioreactor is 28-30°C, the total nitrogen concentration of the influent is 450-480mg/L, the hydraulic retention time is 20h, and the average solid of the suspended sludge The residence time of the granular sludge is 8 days, and the average solid residence time of the granular sludge is 30 days. The mass of the granular sludge in the system during the stable operation stage accounts for 50% of the total mass of the activated sludge. It has been proved by molecular biological identification that in the granular sludge, anaerobic ammonia oxidation The bacteria are effectively enriched; compared with the traditional nitrification-denitrification process, the device and process of this embodiment can increase the total nitrogen removal rate to 90% and the total nitrogen removal load to 0.8 without adding an external carbon source. kg/(m 3 ·d). Moreover, the start-up of the anaerobic ammonium oxidation granular sludge process is shortened to 3 months, which is conducive to the popularization and application of the process in actual projects.
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| EP1236688A1 (en) * | 1999-11-12 | 2002-09-04 | Insertam S.L. | Biological purification plant for residual waters equipped with anaerobic digestors and purification process |
| CN1927739A (en) * | 2006-08-29 | 2007-03-14 | 湖南大学 | Operation mode and apparatus of short distance nitration-anaerobic ammoxidation batched biomembrane denitrogenation |
| CN103086573A (en) * | 2013-01-28 | 2013-05-08 | 应清界 | Method for treating municipal sewage by using separate FBR (facultative biofilm reactor) |
| CN103172175A (en) * | 2013-03-22 | 2013-06-26 | 北京交通大学 | Method and device for synchronous partial nitrification and biofilm anaerobic ammonia oxidation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1236688A1 (en) * | 1999-11-12 | 2002-09-04 | Insertam S.L. | Biological purification plant for residual waters equipped with anaerobic digestors and purification process |
| CN1927739A (en) * | 2006-08-29 | 2007-03-14 | 湖南大学 | Operation mode and apparatus of short distance nitration-anaerobic ammoxidation batched biomembrane denitrogenation |
| CN103086573A (en) * | 2013-01-28 | 2013-05-08 | 应清界 | Method for treating municipal sewage by using separate FBR (facultative biofilm reactor) |
| CN103172175A (en) * | 2013-03-22 | 2013-06-26 | 北京交通大学 | Method and device for synchronous partial nitrification and biofilm anaerobic ammonia oxidation |
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