共查询到19条相似文献,搜索用时 203 毫秒
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污水生物脱氮除磷新技术 总被引:1,自引:0,他引:1
概述了传统生物脱氮除磷原理,分析了传统生物脱氮除磷工艺的不足,并介绍了同时硝化反硝化、短程硝化反硝化、厌氧氨氧化、反硝化除磷等几种经济、高效的生物脱氮除磷新技术的原理和研究现状. 相似文献
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反硝化脱氮除磷技术与传统脱氮除磷方式相比,能够在缺氧段实现同步体脱氮除磷,具有节约碳源,减少能源消耗、污泥产量低等优点。简要概述了反硝化除磷的机理,总结并分析了碳源种类、碳源浓度、电子受体、温度、p H值、水力停留时间和污泥浓度等影响因素对反硝化脱氮除磷技术的影响。 相似文献
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考察了曝气量、进水C/N比(COD/TN)及进水氮、磷浓度对序批式移动床生物膜反应器(SBMBBR)脱氮除磷效果的影响,分析了该复合生物系统的污染物去除特性。实验结果表明,反应器脱氮主要是基于好氧段发生的同时硝化反硝化(SND)作用实现的,而除磷是基于常规生物除磷和反硝化除磷过程而完成;在保持载体良好流化状态的前提下,反应器硝化效果和TP去除受曝气量变化影响不大,反硝化效果随曝气量的减小而改善;采用厌氧/好氧序批式运行方式,能够使进水中的有机物被反硝化聚磷菌优先利用,实现一碳两用,节省了脱氮对外部碳源的需要,在进水C/N为2.8~4.0时能获得良好的硝化、反硝化和TP去除效果;随着进水氮、磷浓度的提高,反应器除磷效果相对稳定,脱氮效果变差,最大氮、磷去除负荷分别达到0.17 kg TN·m-3·d-1和0.06 kg TP·m-3·d-1。 相似文献
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SBR工艺脱氮除磷研究进展 总被引:10,自引:1,他引:10
总结了SBR脱氮工艺中的同步硝化/反硝化、亚硝化脱氮现象,讨论了影响SBR除磷的碳源、聚磷菌与非聚磷菌竞争、pH值、好氧曝气、污泥龄、水力停留时间等因素,并对SBR工艺中脱氮除磷的相互影响进行了探讨;最后,给出了可以同时脱氮除磷的一种SBR的运行方式。 相似文献
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好氧颗粒污泥应用于生物脱氮,机理为如下几种。第一种为常规硝化-反硝化途径。第二种为亚硝化-反硝化途径,颗粒污泥的外部为好氧的硝化区.通过适当的控制.使硝化过程停留在亚硝化阶段.直接进入内层进行反硝化。第三种为硝化-厌氧氨氧化途径.通过外层的硝化和内层的厌氧氨氧化作用实现脱氮。第四种为硝化-反硝化聚磷方式.颗粒污泥内部在反硝化的同时聚磷,实现好氧颗粒污泥同步脱氮除磷。第五种脱氮的途径为好氧反硝化。在不同的条件下.某一种脱氮的途径可能占主导地位。 相似文献
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Elena Rustrian Jean Philippe Delgens Nicolas Bernet Ren Moletta 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1998,73(4):421-431
The objective of this study was to develop an integrated process for simultaneous removal of carbon, nitrogen and phosphorus from industrial wastewaters. The process consisted of a-two step anaerobic digestion reactor, for carbon removal, coupled with a sequencing batch reactor (SBR) for nutrient removal. In the proposed process, carbon is eliminated into biogas by anaerobic digestion: acidogenesis and methanogenesis. The volatile fatty acids (VFA) produced during the first step of anaerobic digestion can be used as electron donors for both dephosphatation and denitrification. In the third reactor (SBR) dephosphatation and nitrification are induced through the application of an anaerobic–aerobic cycle. This paper describes the first trials and experiments on the SBR and a period of 210 days during which the SBR was connected to the acidogenic and methanogenic reactors. It was shown that nitrification of ammonia took place in the SBR reactor, during the aerobic phase. Furthermore, denitrification and VFA production were achieved together in the acidogenic reactor, when the efflux of nitrates from the SBR reactor was added to the first reactor influx. The proposed process was fed with a synthetic industrial wastewater, the composition of which was: total organic carbon (TOC)=2200 mg dm−3, total Kjeldahl nitrogen (TKN)=86 mg dm−3, phosphorus under phosphate form (P-PO4)=20 mg dm−3. In these conditions, removals of carbon, nitrogen and phosphorus were 98%, 78% and 95% respectively. The results show that the combination of the two-step anaerobic digestion reactor and an SBR reactor is effective for simultaneous carbon, nitrogen and phosphorus removal. Reactor arrangements enabled zones of bacterial populations to exist. Complete denitrification occurred in the acidogenic reactor and hence the anaerobic activity was not reduced or inhibited by the presence of nitrate, thus allowing high TOC removal. Stable phosphorus release and phosphorus uptake took place in the SBR after coupling of the three reactors. A fast-settling compact sludge was generated in the SBR with the operational conditions applied, thus giving good separation of supernatant fluid. The benefits from this process are the saving of (i) an external carbon source for denitrification and phosphorus removal, (ii) a reactor for the denitrification step. © 1998 Society of Chemical Industry 相似文献
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二段上流式曝气生物滤池去除高标准景观补给水中氮磷营养物 总被引:1,自引:0,他引:1
虑及回用水中营养物质对水体富营养化的不利影响,许多地区对号观补给水的氮磷含量制定了极为严格的标准。本研究考察了作为三级处理工艺的二段上流式曝气生物滤池在硝化、反硝化、化学除磷效率等方面的相关影响因素及工艺的可行性,并进行了设计参数的优化。试验结果表明,此二段上流式曝气生物滤池的最后出水可满足回用水总氮小于2mg/L,总磷小于0.3mg/L的严格要求,且其较高的处理效率使得反应器可在较高的水力负荷下仍接近完全硝化与反硝化;在反应器的处理能力内,硝化和反硝化反应可以在较高的滤速下达到更好的处理效果;本工艺在抗水力负荷冲击方面有较大的优势。 相似文献
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