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污水脱氮除磷技术及工艺探析 总被引:2,自引:0,他引:2
水体富营养化是世界性问题,大量的研究已经证明,污水中的氮和磷是导致受纳水体富营养化的主要原因之一.控制污水中氮和磷的排放,对于防治水体富营养化是十分重要的.本文在简述生物脱氮除磷原理的基础上,论述了几中常用的脱氮除磷技术及工艺. 相似文献
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城镇污水采用活性污泥法除磷脱氮工艺探讨 总被引:1,自引:0,他引:1
近年来,随着洗涤剂的广泛使用,废水中氮、磷的含量明显增加,引起水体富营养化加剧,因此,必须有效提高城镇污水处理厂氮和磷的去除。对多种除磷脱氮的活性污泥法,包括氧化沟工艺。A^2/O工艺、UCT工艺等,进行比较与分析,结果表明,UCT工艺比较适合除磷脱氮要求较高的污水处理厂应用。 相似文献
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随着社会的发展和现代化工业的迅速发展及人们生活水平的不断提高,生活污水和工业废水的大量排放,氮、磷的污染也日趋严重,水体的富营养化问题引起了整个社会的关注及专家的重视。人们环保意识逐渐加强,生物除磷脱氮技术得到了较大的发展和应用,通过国家及地方投资建立了多种形式的除磷脱氮城市污水处理厂。本文结合铜仁市污水处理厂A2/O工艺系统的运行情况,对生物除磷脱氮机理、影响除磷效果的因素进行研究,为全面提高A2/O工艺系统的运行效果提供一定经验。 相似文献
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系统的阐述了污水脱氮除磷的机理,介绍了国内脱氮除磷的新技术,包括SND,SHARN-ANAMMOX,CANON和OLAND等工艺的原理、特点、工艺流程,列举了脱氮除磷工艺在污水处理行业的工程实例。得出目前污水处理脱氮除磷的新技术都是朝着高效、低耗、经济的可持续方向发展的,并指出污水处理脱氮除磷工艺未来的主要发展方向。 相似文献
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低碳源污水的脱氮除磷技术研究进展 总被引:1,自引:0,他引:1
总结了低碳源污水的主要脱氮策略(外加碳源、优化进水策略、短程硝化反硝化、厌氧氨氧化等),除磷策略(外加碳源、分段进水、生物强化除磷等)以及同步脱氮除磷对策(反硝化除磷、分段进水等)。指出改进现有工艺充分利用进水碳源、外加其他富含有机碳的废物资源、开发寻求碳源需求低的新型脱氮除磷工艺、结合实时在线控制优化系统运行是提高低碳源污水的脱氮除磷效率的较佳途径。 相似文献
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人类的生存依赖水资源,工业的快速进步发展对水体产生负面影响,氮、磷过度排放使得水体持续恶化,随之而来的水污染成为不可小觑的重大环境问题,干扰人类正常生命活动,毁坏生态平衡,是国民经济绿色长远发展停滞的根源。现已通过多种技术对水环境进行改善修复,其中低C/N比污水脱氮除磷是解决环境问题的重要方法和研究热点。以传统工艺和新型工艺为切入点,以应用型和改进型为分类方法,对现今低C/N比污水脱氮除磷处理工艺进行总结,旨在为低C/N比污水脱氮除磷技术的发展提供新参考和新思路。 相似文献
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概述j-化工废水的氮、磷预处理技术及研究进展,分析了各种预处理技术的氮、磷脱除机理和优缺点,并对同步脱氮除磷预处理技术的研究现状进行了介绍,提出了化工废水氮、磷预处理技术的研究方向和未来发展趋势。 相似文献
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Activated sludge process has been widely used to remove phosphorus and nitrogen from wastewater. However, the nitrogen and phosphorus removal is sometimes unsatisfactory due to the low influent COD. Another problem with the activated sludge process is that large amount of waste activated sludge is produced, which needs further treatment. In this study, the waste activated sludge alkaline fermentation liquid was used as the main carbon source for phosphorus and nitrogen removal under anaerobic followed by alternating aerobic-anoxic conditions, and the results were compared with those using acetic acid as the carbon source. The use of alkaline fermentation liquid not only affected the transformations of phosphorus, nitrogen, intracellular polyhydroxyalkanoates and glycogen, but also led to higher removal efficiencies for phosphorus and nitrogen compared with acetic acid. It was observed that ammonium was completely removed with either alkaline fermentation liquid or acetic acid as the carbon source. However, the former resulted in higher removal efficiencies for phosphorus (95%) and nitrogen (82%), while the latter showed lower ones (87% and 74%, respectively). The presence of a large amount of propionic acid in the alkaline fermentation liquid was one possible reason for its higher phosphorus removal efficiency. Exogenous instead of endogenous denitrification was the main pathway for nitrogen removal with the alkaline fermentation liquid as the carbon source, which was responsible for its higher nitrogen removal efficiency. It seems that the alkaline fermentation liquid can replace acetic acid as the carbon source for phosphorus and nitrogen removal in anaerobic followed by alternating aerobic-anoxic sequencing batch reactor. 相似文献
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城市污水生物脱氮除磷技术的研究进展 总被引:6,自引:0,他引:6
评述了近年来城市污水生物脱氮除磷技术的研究进展,重点介绍了生物处理的新方法:ANAMMOX–SHARON组合法、好氧同步脱氮除磷法和倒置A2/O法,并比较了各种工艺的优缺点。指出反硝化聚磷技术在倒置A2/O工艺中的应用将成为城市污水同步脱氮除磷研究的一个重要发展方向。 相似文献
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A full scale modified A2/O process which combined pre-anoxic selector and the staging strategy treating low strength wastewater was investigated. In South China, domestic wastewater is always low in strength due to the high level of groundwater and setting of septic tank at the beginning of wastewater collection system. The results suggested that inadequate denitrification could result in deterioration of phosphorus removal. In addition, influent phosphorus concentration had effect on phosphorus removal. The pre-anoxic selector in modified A2/O process changed the distribution of nitrogen denitrified in different tanks. Characteristics of 3-stage aeration tanks were also studied. The simplified design of rectangular aeration tank could also perform as plug flow as conventional channel aeration tank. In 3-stage aeration tanks, mixed liquid suspended solid (MLSS) increased from one tank to another, while specific oxygen uptake rate (SOUR) of sludge, chemical oxygen demand (COD) and total phosphorus (TP) removal rate decreased, however ammonia nitrogen (NH3-N) and nitrate nitrogen (NO3-N) reaction rate remained constant. Furthermore, high MLSS concentration was not suitable for treating low strength wastewater. Waste sludge discharge could improve removal efficiency of COD, NH3-N, and TP. Without waste sludge discharge, nitrite accumulated in settler. 相似文献
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反硝化除磷能够实现以相同的基质同时脱氮和除磷,是国内外废水生物处理研究的一个热点。讨论和分析了MISS、碳源、C/N和C/P、污泥龄、溶解氧和氧化还原电位以及pH等其他因素对其的影响,为反硝化除磷过程的模拟、试验研究和实际应用提供了参考和依据。 相似文献
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