CN1686872A - Method for removing ammonia nitrogen from sewage in subzone - Google Patents
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Abstract
一种小区污水脱氨氮的方法，它属于污水处理技术领域。本发明是这样实现的：污水经厌氧滤池、接触氧化池、沉淀池处理后，以上向流方式进入两级平行改性沸石吸附再生柱中的一级进行氨氮吸附，当氨氮吸附饱和后停止进水，改由另外一级改性沸石吸附再生柱进行氨氮吸附，同时对氨氮吸附饱和后的改性沸石吸附再生柱进行反冲洗；反冲洗后，加入碳酸氢盐循环再生液进行曝气再生；再生后再一次进行反冲洗，待用；当另一级改性沸石吸附再生柱中氨氮吸附饱和后，再生后改性沸石吸附再生柱重新投入运行。本发明的方法工艺流程简单，基建和运行成本低，氨氮处理效率高，抗氨氮冲击负荷强，可广泛应用于小区污水脱氨氮领域，具有明显的经济、环境和社会效益。The invention discloses a method for removing ammonia nitrogen from community sewage, which belongs to the technical field of sewage treatment. The present invention is realized in this way: after the sewage is treated by the anaerobic filter, the contact oxidation tank, and the sedimentation tank, it enters the first stage of the two-stage parallel modified zeolite adsorption regeneration column in the upward flow mode for ammonia nitrogen adsorption, and when the ammonia nitrogen adsorption is saturated Stop water inflow, change to another stage of modified zeolite adsorption regeneration column for ammonia nitrogen adsorption, and at the same time backwash the modified zeolite adsorption regeneration column after ammonia nitrogen adsorption is saturated; after backwashing, add bicarbonate recycling regeneration liquid for aeration Regeneration; after regeneration, perform backwashing again and wait for use; when the ammonia nitrogen adsorption in the other modified zeolite adsorption regeneration column is saturated, the modified zeolite adsorption regeneration column is put into operation again after regeneration. The method of the present invention has simple technological process, low capital construction and operation costs, high ammonia nitrogen treatment efficiency, strong resistance to ammonia nitrogen impact load, can be widely used in the field of ammonia nitrogen removal from community sewage, and has obvious economic, environmental and social benefits.
Description
技术领域：Technical field:
本发明属于污水处理技术领域，涉及一种小区污水脱氨氮的方法。The invention belongs to the technical field of sewage treatment and relates to a method for removing ammonia nitrogen from community sewage.
背景技术：Background technique:
近年来随着城市建设和工业的高速发展以及城市人口的不断膨胀，城市小区的规模和数量也在急剧增加。虽然全国各城市正在不断积极的新建、改建和扩建城市污水处理厂，但仍有大量的不达标小区污水被直接排放至受纳水体中。这部分污水的排放不仅污染了环境和水源，更加重了水资源的日益短缺和水质的日益恶化，从而导致生态环境的恶性循环。因此如何解决这部分小区污水中氮、磷等污染指标的达标排放，控制水体富营养化对促进污水回用的发展和水环境的恢复有着现实和深远的意义。目前生物好氧有机物的污染经二级处理后已基本得到有效的控制，但是由氮、磷等营养物质引起的水体水华、赤潮等富营养化现象却逐渐加重。由于人们越来越清楚的认识到氮、磷污染所致的水体富营养化对生态环境的巨大威胁，因此严格控制氮、磷等营养性污染物的排放指标已成为业界的普遍共识，废水脱氨氮技术逐渐成为污水处理的热点问题。传统上生物法脱氨氮工艺是最为经济有效的治理技术，并在理论上和技术上均取得了重大突破，然而这些工艺普遍存在投资大、占地面积大、难以实现氨氮完全去除等缺点。而物化法虽然能节约占地面积，提高氮素的去除率，但成本高、操作专业、流程复杂，仍难以有效解决除氨效果不理想这个问题。为此寻求一种即可以提高氨氮去除率又能进行生物脱氮的新工艺势在必行。大量研究发现沸石作为一种呈结晶阴离子型架状结构的多孔铝硅酸盐，对NH4 +具有特殊的离子交换和吸附性能，并可以作为生物载体吸附硝化菌，从而达到生物脱氮的目的。由于沸石对氨氮具有较高的选择性，利用沸石吸附技术去除城市废水中氨氮在国内外已得到广泛发展。但只将沸石作为离子交换树脂吸附水相中的氨氮，则其对亚硝氮、硝氮、有机氮等除氨氮以外的其它形态的氮并没有去除作用，限制了它在水处理领域的应用。实践证明利用沸石分子筛作用去除水中的氨氮后，再通过沸石表面生长的大量硝化菌进一步去除沸石吸附的NH4 +实现沸石的生物再生，从而增强系统的硝化性能，能够对实际二级和一级处理出水中的氨氮稳定去除。In recent years, with the rapid development of urban construction and industry, as well as the continuous expansion of urban population, the size and number of urban communities are also increasing sharply. Although cities across the country are actively building, rebuilding and expanding urban sewage treatment plants, there are still a large number of substandard community sewage that is directly discharged into receiving water bodies. The discharge of this part of sewage not only pollutes the environment and water sources, but also worsens the increasing shortage of water resources and the deterioration of water quality, thus leading to a vicious cycle of the ecological environment. Therefore, how to solve the standard discharge of nitrogen, phosphorus and other pollution indicators in the sewage of this part of the community, and control the eutrophication of the water body has realistic and far-reaching significance for promoting the development of sewage reuse and the restoration of the water environment. At present, the pollution of biological aerobic organic matter has basically been effectively controlled after secondary treatment, but the phenomenon of eutrophication caused by nutrients such as nitrogen and phosphorus has gradually increased. As people are becoming more and more aware of the huge threat of eutrophication of water bodies caused by nitrogen and phosphorus pollution to the ecological environment, it has become a general consensus in the industry to strictly control the discharge indicators of nitrogen, phosphorus and other nutrient pollutants. Ammonia nitrogen technology has gradually become a hot issue in sewage treatment. Traditionally, the biological ammonia nitrogen removal process is the most economical and effective treatment technology, and has made major breakthroughs in theory and technology. However, these processes generally have disadvantages such as large investment, large area occupation, and difficulty in completely removing ammonia nitrogen. Although the physicochemical method can save the floor area and improve the removal rate of nitrogen, it is still difficult to effectively solve the problem of unsatisfactory ammonia removal due to high cost, professional operation and complicated process. Therefore, it is imperative to seek a new process that can not only improve the removal rate of ammonia nitrogen but also carry out biological denitrification. A large number of studies have found that zeolite, as a porous aluminosilicate with a crystalline anionic framework structure, has special ion exchange and adsorption properties for NH 4 + , and can be used as a biological carrier to adsorb nitrifying bacteria, thereby achieving the purpose of biological denitrification . Due to the high selectivity of zeolite to ammonia nitrogen, the use of zeolite adsorption technology to remove ammonia nitrogen in urban wastewater has been widely developed at home and abroad. However, if zeolite is only used as an ion exchange resin to adsorb ammonia nitrogen in the water phase, it has no removal effect on nitrite nitrogen, nitrate nitrogen, organic nitrogen and other forms of nitrogen other than ammonia nitrogen, which limits its application in the field of water treatment. . Practice has proved that after using zeolite molecular sieve to remove ammonia nitrogen in water, a large number of nitrifying bacteria growing on the surface of zeolite can further remove the NH 4 + adsorbed by zeolite to realize the biological regeneration of zeolite, thereby enhancing the nitrification performance of the system, which can be used for the actual secondary and primary Ammonia nitrogen in the treated effluent is removed stably.
发明内容：Invention content:
本发明的目的在于提供一种小区污水脱氨氮的方法，以克服传统的硝化反硝化生物脱氨氮工艺投资大、占地面积大、难以实现氨氮完全去除等诸多缺点。本发明是这样对小区污水进行脱氨氮处理的：污水经厌氧滤池、接触氧化池、沉淀池处理后，其核心是：(一)沉淀池出水进入盛装粒状改性沸石的改性沸石吸附再生单元中，所述改性沸石吸附再生单元包括平行的两级改性沸石吸附再生柱，沉淀池出水以上向流方式进入其中一级改性沸石吸附再生柱中，沸石作为离子交换剂吸附污水中的氨氮，粘附在沸石表面的硝化菌生物膜吸收水中的游离氨；(二)该级改性沸石吸附再生柱内的改性沸石在氨氮吸附饱和后停止进水，污水改以上向流方式进入另外一级改性沸石吸附再生柱中，进行氨氮吸附，同时对氨氮吸附饱和后的改性沸石吸附再生柱进行反冲洗处理；(三)改性沸石吸附再生柱反冲洗后，加入碳酸氢盐循环再生液，同时进行曝气，完成改性沸石吸附再生柱的再生；(四)完成生物再生后的改性沸石吸附再生柱再一次进行反冲洗，去除富含硝氮的反冲洗水，待用；(五)当另一级改性沸石吸附再生柱氨氮吸附饱和后，已经完成生物再生的改性沸石吸附再生柱重新投入运行，如此往复，长期循环使用。The purpose of the present invention is to provide a method for removing ammonia nitrogen from community sewage, so as to overcome many disadvantages of the traditional nitrification and denitrification biological ammonia nitrogen removal process, such as large investment, large floor area, and difficulty in completely removing ammonia nitrogen. In the present invention, the deammonization nitrogen treatment is carried out to the sewage of the community in this way: after the sewage is treated by the anaerobic filter tank, the contact oxidation tank and the sedimentation tank, the core is: (1) the effluent of the sedimentation tank enters the modified zeolite adsorbed by the granular modified zeolite In the regeneration unit, the modified zeolite adsorption regeneration unit includes parallel two-stage modified zeolite adsorption regeneration columns, and the effluent from the sedimentation tank enters the first-stage modified zeolite adsorption regeneration column in the upward flow mode, and the zeolite is used as an ion exchanger to absorb sewage The ammonia nitrogen in the ammonia nitrogen, the nitrifying bacteria biofilm attached to the surface of the zeolite absorbs the free ammonia in the water; (2) The modified zeolite in the modified zeolite adsorption regeneration column of this level stops the water inflow after the adsorption of ammonia nitrogen is saturated, and the sewage changes to the upward flow into another stage of modified zeolite adsorption regeneration column for ammonia nitrogen adsorption, and at the same time backwash the modified zeolite adsorption regeneration column after ammonia nitrogen adsorption saturation; (3) After backwashing the modified zeolite adsorption regeneration column, add carbonic acid Hydrogen salt circulation regeneration liquid, and aeration at the same time, complete the regeneration of the modified zeolite adsorption regeneration column; (4) The modified zeolite adsorption regeneration column after biological regeneration is backwashed again to remove the backwash water rich in nitrate nitrogen (5) When another modified zeolite adsorption regeneration column is saturated with ammonia nitrogen adsorption, the modified zeolite adsorption regeneration column that has completed biological regeneration is put into operation again, and this reciprocates for long-term recycling.
本发明提出了在小区污水处理过程中，污水经厌氧、接触氧化、沉淀处理后，在污水进入改性沸石吸附再生容器时，沸石作为离子交换剂吸附污水中的氨氮，同时又作为硝化菌生物膜载体，为微生物提供生长介质。反应过程中，一方面沸石通过离子交换作用吸附水中的铵根，另一方面生长在沸石表面的硝化菌将沸石表面的氨氮转化为硝酸盐。当水中NH4 +浓度下降时，已吸附NH4 +的沸石与水中阳离子发生离子交换作用，释放出部分NH4 +供硝化菌继续硝化，直至水中NH4 +浓度降至很低为止，此时沸石得以全部或者部分再生，可以继续循环使用。沸石生化结合脱氨氮过程实质是沸石离子交换、沸石化学再生和生物硝化三个过程，其中沸石的化学再生和解吸氨的生物硝化过程同时发生，可看作是沸石生物再生过程。本发明的方法工艺流程简单，基建和运行成本低，氨氮处理效率高，抗氨氮冲击负荷强，可广泛应用于小区污水脱氨氮领域，具有明显的经济、环境和社会效益。本工艺与传统的硝化反硝化生物脱氨氮工艺相比，具有以下有益效果：The invention proposes that in the sewage treatment process of the community, after the sewage is treated by anaerobic, contact oxidation and precipitation, when the sewage enters the modified zeolite adsorption regeneration container, the zeolite acts as an ion exchanger to adsorb ammonia nitrogen in the sewage, and at the same time acts as a nitrifying bacteria A biofilm carrier that provides a growth medium for microorganisms. During the reaction process, on the one hand, zeolite adsorbs ammonium radicals in water through ion exchange, and on the other hand, nitrifying bacteria growing on the surface of zeolite convert ammonia nitrogen on the surface of zeolite into nitrate. When the concentration of NH 4 + in the water drops, the zeolite that has adsorbed NH 4 + has ion exchange with the cation in the water, releasing part of NH 4 + for the nitrifying bacteria to continue nitrification until the concentration of NH 4 + in the water drops to a very low level, at this time The zeolite can be completely or partially regenerated and can be recycled continuously. The process of zeolite biochemical combined with ammonia nitrogen removal is essentially three processes of zeolite ion exchange, zeolite chemical regeneration and biological nitrification, in which the chemical regeneration of zeolite and the biological nitrification process of desorbing ammonia occur at the same time, which can be regarded as the biological regeneration process of zeolite. The method of the present invention has simple technological process, low capital construction and operation costs, high ammonia nitrogen treatment efficiency, strong resistance to ammonia nitrogen impact load, can be widely used in the field of ammonia nitrogen removal from community sewage, and has obvious economic, environmental and social benefits. Compared with the traditional nitrification and denitrification biological ammonia nitrogen removal process, this process has the following beneficial effects:
(1)在本发明的小区污水脱氨氮过程中，污水经厌氧池、接触氧化池、斜板沉淀池等传统工艺处理后，大部分有机物和部分氨氮得以去除。污水流经沸石改性沸石吸附再生柱时，由于改性沸石对NH4 +具有特殊的离子交换和吸附性能，污水中残留的NH4 +将被吸附到沸石表面。待沸石柱氨氮吸附饱和后，通过使用碳酸氢盐溶液对沸石所吸附的NH4 +离子进行解吸，并进行充分曝气。利用沸石表面的微生物就可以将溶液中的NH4 +氧化成NO3 -，实现改性沸石的生物再生，从而实现小区污水处理过程，改性沸石可以连续生物再生，长期循环使用的目标。(1) In the process of removing ammonia nitrogen from community sewage of the present invention, most of the organic matter and part of ammonia nitrogen can be removed after the sewage is treated by traditional processes such as anaerobic tanks, contact oxidation tanks, and inclined plate sedimentation tanks. When the sewage flows through the zeolite-modified zeolite adsorption regeneration column, because the modified zeolite has special ion exchange and adsorption properties for NH 4 + , the residual NH 4 + in the sewage will be adsorbed to the surface of the zeolite. After the ammonia nitrogen adsorption of the zeolite column is saturated, the NH 4 + ions adsorbed by the zeolite are desorbed by using a bicarbonate solution and fully aerated. The microorganisms on the surface of the zeolite can oxidize NH 4 + into NO 3 - in the solution to realize the biological regeneration of the modified zeolite, thereby realizing the sewage treatment process of the community. The modified zeolite can be continuously biologically regenerated and used for long-term recycling.
(2)改性沸石吸附再生柱的吸附阶段是将斜板沉淀池出水中所有的NH4 +几乎都富集到沸石上。因此在生物再生阶段，只需将含有阳离子的再生液在系统中循环流动，以解吸被沸石吸附的NH4 +，使其进入到溶液当中，供微生物硝化。由于在再生阶段添加的碳酸氢盐缓冲剂所能提供的阳离子已足够维持改性沸石化学再生所需的阳离于浓度，无须再添加其他用于解吸的化学试剂。与现有的沸石再生工艺相比，沸石再生只需在同一反应器中完成。因此，该方法的操作费用、占地面积和大规模的用于化学再生的盐水生产可以减至最低。(2) The adsorption stage of the modified zeolite adsorption regeneration column is to enrich almost all the NH 4 + in the effluent of the inclined plate sedimentation tank to the zeolite. Therefore, in the biological regeneration stage, it is only necessary to circulate the regeneration solution containing cations in the system to desorb the NH 4 + adsorbed by the zeolite and make it enter the solution for nitrification by microorganisms. Since the cations provided by the bicarbonate buffer added in the regeneration stage are sufficient to maintain the cation concentration required for the chemical regeneration of the modified zeolite, there is no need to add other chemical reagents for desorption. Compared with the existing zeolite regeneration process, the zeolite regeneration only needs to be completed in the same reactor. Thus, the process' operating costs, footprint, and large-scale brine production for chemical regeneration can be minimized.
(3)改性沸石吸附再生柱不仅对氨氮具有一定的离子交换选择性，而且对溶解性有机物也具有良好的吸附性能，沸石表面所具有的较高的微生物活性将进一步降低污水中污染物的含量，保证出水水质。(3) The modified zeolite adsorption regeneration column not only has a certain ion exchange selectivity for ammonia nitrogen, but also has good adsorption performance for dissolved organic matter. The high microbial activity on the surface of zeolite will further reduce the pollution of pollutants in sewage content to ensure the quality of effluent water.
(4)本发明的改性沸石吸附再生柱上均装有反冲洗口，可以保证无悬浮颗粒积累造成的床层填塞，同时还可以去除与硝化菌形成营养物竞争的异养菌，提高改性沸石吸附再生柱的工作寿命和再生质量。(4) The modified zeolite adsorption regeneration column of the present invention is equipped with a backwash port, which can ensure that there is no bed packing caused by the accumulation of suspended particles, and can also remove heterotrophic bacteria that compete with nitrifying bacteria to form nutrients, and improve the improvement. The working life and regeneration quality of the active zeolite adsorption regeneration column.
附图说明：Description of drawings:
图1为本发明的工艺流程图，图2为改性沸石吸附再生柱生物再生工艺流程图。Fig. 1 is a process flow chart of the present invention, and Fig. 2 is a process flow chart of the biological regeneration of a modified zeolite adsorption regeneration column.
具体实施方式：Detailed ways:
具体实施方式一：本实施方式是这样对小区污水进行脱氨氮处理的：污水经厌氧滤池、接触氧化池、沉淀池处理后，其核心是：(一)沉淀池出水进入盛装粒状改性沸石的改性沸石吸附再生单元中，所述改性沸石吸附再生单元包括平行的两级改性沸石吸附再生柱，沉淀池出水以上向流方式进入其中一级改性沸石吸附再生柱中，沸石作为离子交换剂吸附污水中的氨氮，粘附在沸石表面的硝化菌生物膜吸收水中的游离氨；(二)该级改性沸石吸附再生柱内的改性沸石在氨氮吸附饱和后停止进水，污水改以上向流方式进入另外一级改性沸石吸附再生柱中，进行氨氮吸附，同时对氨氮吸附饱和后的改性沸石吸附再生柱进行反冲洗处理；(三)改性沸石吸附再生柱反冲洗后，加入碳酸氢盐循环再生液，同时进行曝气，完成改性沸石吸附再生柱的再生；(四)完成生物再生后的改性沸石吸附再生柱再一次进行反冲洗，去除富含硝氮的反冲洗水，待用；(五)当另一级改性沸石吸附再生柱氨氮吸附饱和后，已经完成生物再生的改性沸石吸附再生柱重新投入运行，如此往复，长期循环使用。所述改性沸石的粒径为0.8～1.5mm；改性沸石上生长的硝化菌生物膜是由斜板沉淀池污水流入改性沸石吸附再生柱后35～40天自然形成的生物膜，其生物量为2～6.5mgVSS/g；改性沸石吸附再生柱进水流速为4～10m/h，离子交换时间至少10min；碳酸氢盐再生液中Na+浓度为2000mg/L，再生时再生液以1～2m/h的流速由泵打入改性沸石吸附再生柱中；改性沸石吸附再生柱反冲洗时的曝气强度2～4L/m2·s；改性沸石吸附再生柱的反冲时间为10～20min；反冲洗水强度为10～20L/m2·s。Specific Embodiment 1: In this embodiment, the deammonization nitrogen treatment is carried out to the sewage of the community in this way: after the sewage is treated by the anaerobic filter, the contact oxidation tank and the sedimentation tank, the core is: (1) the effluent of the sedimentation tank enters the granular modified In the modified zeolite adsorption regeneration unit of zeolite, the modified zeolite adsorption regeneration unit includes parallel two-stage modified zeolite adsorption regeneration columns, and the effluent from the sedimentation tank enters the one-stage modified zeolite adsorption regeneration column in the upward flow mode, and the zeolite As an ion exchanger to adsorb ammonia nitrogen in sewage, the nitrifying bacteria biofilm adhering to the surface of zeolite absorbs free ammonia in water; (2) The modified zeolite in this level of modified zeolite adsorption regeneration column stops water inflow after ammonia nitrogen adsorption is saturated , the sewage is changed to flow upwards into another stage of modified zeolite adsorption regeneration column for ammonia nitrogen adsorption, and at the same time, the modified zeolite adsorption regeneration column after ammonia nitrogen adsorption saturation is backwashed; (3) Modified zeolite adsorption regeneration column After backwashing, add bicarbonate circulating regeneration solution and aerate at the same time to complete the regeneration of the modified zeolite adsorption regeneration column; (4) The modified zeolite adsorption regeneration column after biological regeneration is backwashed again to remove the (5) After another stage of modified zeolite adsorption regeneration column is saturated with ammonia nitrogen, the modified zeolite adsorption regeneration column that has completed biological regeneration is put into operation again, and so on, long-term cycle use. The particle diameter of described modified zeolite is 0.8～1.5mm; The biofilm of the nitrifying bacteria that grows on the modified zeolite is the biofilm that naturally forms 35～40 days after the sewage of inclined plate sedimentation tank flows into modified zeolite adsorption regeneration column, its The biomass is 2-6.5mgVSS/g; the water flow rate of the modified zeolite adsorption regeneration column is 4-10m/h, and the ion exchange time is at least 10min; the Na + concentration in the bicarbonate regeneration solution is 2000mg/L, and the regeneration solution Pump it into the modified zeolite adsorption regeneration column at a flow rate of 1-2m/h; the aeration intensity of the modified zeolite adsorption regeneration column is 2-4L/m 2 ·s when backwashing; the modified zeolite adsorption regeneration column The flushing time is 10-20 minutes; the backwash water intensity is 10-20L/m 2 ·s.
具体实施方式二：参见图1和图2，本实施方式的改性沸石吸附再生单元由二极平行的改性沸石吸附再生柱4和改性沸石吸附再生柱5组成，改性沸石吸附再生柱4和改性沸石吸附再生柱5之间装有自动转换开关6，改性沸石吸附再生柱的底部装有反冲洗装置8，改性沸石吸附再生柱的一侧装有碳酸氢盐再生液储藏罐9，改性沸石吸附再生柱与再生液储藏罐9之间装有再生液回流装置10，再生柱底部装有曝气装置7，用其处理污水中氨氮的过程为：(一)污水经厌氧滤池1、接触氧化池2、斜板沉淀池3处理后，斜板沉淀池3出水以上向流方式进入改性沸石吸附再生柱4中，沸石作为离子交换剂吸附污水中的铵根，粘附在沸石表面的硝化菌生物膜吸收水中的游离氨；(二)改性沸石吸附再生柱4内的改性沸石在氨氮离子交换饱和后停止进水，污水改以上向流方式进入改性沸石吸附再生柱5中，进行氨氮离子交换，同时对氨氮吸附饱和后的改性沸石吸附再生柱4进行生物再生，以恢复改性沸石的氨氮吸附能力，改性沸石进行生物再生时，首先需对该再生柱进行反冲洗，反冲洗操作不仅可以去除悬浮物，防止床层阻塞，同时还可以去除与硝化菌形成营养物竞争的异养菌；(三)改性沸石吸附再生柱4反冲洗后，将一定浓度的碳酸氢盐循环再生液用泵打入再生柱，在保证生物再生时硝化菌所需的稳定的PH值的同时，为再生过程提供足够浓度的Na+，同时进行曝气以保证硝化菌进行硝化反应时对氧的需要；(四)完成生物再生后的改性沸石吸附再生柱4再一次进行反冲洗，去除富含Na+的反冲洗水，待用；(五)当改性沸石吸附再生柱5中氨氮吸附饱和后，已经完成生物再生的一级改性沸石吸附再生柱4重新投入运行，如此往复，长期循环使用。Specific embodiment two: Referring to Fig. 1 and Fig. 2, the modified zeolite adsorption regeneration unit of the present embodiment is composed of a modified zeolite adsorption regeneration column 4 and a modified zeolite adsorption regeneration column 5 parallel to each other, the modified zeolite adsorption regeneration column 4 and the modified zeolite adsorption regeneration column 5 are equipped with an automatic transfer switch 6, the bottom of the modified zeolite adsorption regeneration column is equipped with a backwashing device 8, and one side of the modified zeolite adsorption regeneration column is equipped with bicarbonate regeneration solution storage Tank 9, a regeneration liquid reflux device 10 is installed between the modified zeolite adsorption regeneration column and the regeneration liquid storage tank 9, and an aeration device 7 is installed at the bottom of the regeneration column, and the process of using it to treat ammonia nitrogen in the sewage is: (1) the sewage is passed through After the treatment of anaerobic filter 1,
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| CN102167473A (en) * | 2011-03-09 | 2011-08-31 | 安徽省环境科学研究院 | Water treatment method utilizing regenerated zeolite bed ammonia-nitrogen converter |
| CN103374539A (en) * | 2013-07-02 | 2013-10-30 | 中国科学院烟台海岸带研究所 | Proteus mirabilis capable of eliminating ammonia nitrogen in water environment and application thereof |
| CN103771648A (en) * | 2012-10-18 | 2014-05-07 | 上海纳米技术及应用国家工程研究中心有限公司 | Technology for treating low concentration ammonia nitrogen waste water |
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| CN108190993A (en) * | 2018-01-10 | 2018-06-22 | 安徽普氏生态环境工程有限公司 | A kind of sewage disposal system and its technique of double zeolite adsorbent equipments |
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