共查询到20条相似文献,搜索用时 93 毫秒
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生物脱氮技术在我国焦化废水处理中的应用与研究 总被引:1,自引:0,他引:1
阐述了我国焦化废水处理的必要性及现状,重点分析了生物脱氮技术及其在焦化废水处理中的应用,并对优化A/O法工艺和开发适合国情的脱氮技术提出看法. 相似文献
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焦化废水处理技术研究开发最新进展 总被引:9,自引:0,他引:9
分析了活性污泥法、吸附法、混凝沉淀法、生物脱氮等焦化废水处理技术的发展历程,介绍了催化湿式氧化法、光催化氧化法、臭氧深度氧化等焦化废水处理新工艺、新技术研发的最新动态。PAC-MBR组合工艺、UBF—BAF组合工艺等的开发及实践应用表明,不同工艺的合理组合是处理焦化废水的发展方向之一。 相似文献
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概述了焦化废水的特点,对焦化废水的处理方法做了简单介绍,指出焦化废水处理的关键步骤主要是脱氮,并阐述了脱氮的原理,最后对A2/O工艺处理焦化废水的优点做了简单论述。。 相似文献
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A~2/O生物脱氮工艺在焦化废水处理中的应用 总被引:2,自引:0,他引:2
介绍了生物法处理焦化废水工艺的改进和对比,总结并讨论了影响去除COD、NH3-N的主要因素:进水水质、回流比、C/N比、溶解氧、pH值和温度等。生产实践证明,A2/O生物脱氮工艺对于处理焦化废水是有效的,可使COD、NH3-N等指标达到有关国标的二级标准。 相似文献
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介绍了A/O法生物脱氮工艺的特点,分析了焦化废水处理过程中进水水质、废水温度、溶解氧和pH值等对A/O生物脱氮工艺的影响。经生产调试和优化操作,系统运行稳定,各项参数指标控制在工艺要求范围内,出水酚≤0.3mg/L、氰≤0.2mg/L、COD≤50mg/L、氨氮≤8mg/L,达到国家排放标准。 相似文献
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A-O法焦化废水处理装置的开工与调试 总被引:3,自引:1,他引:3
利用原有活性污泥法的基础设施,将焦化废水生化处理工艺改造成硝化-反硝化法,经生产调试和优化操作,处理系统运行稳定,出水中酚、氰、COD和氨氮等指标均达到国家标准。 相似文献
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Biological denitrification of nitrate-containing waste water and ground water. The differing objectives serve to distinguish processes for the treatment of waste water and those for the production of drinking water. In waste water purification, frequent use is made of submerged reactors with deposition and recycling of bacteria. The carbon compounds required by the bacteria are either present in the water or have to be added. If the nitrogen is present as ammonium in the waste water, then there are several different ways of combining nitrification and denitrification reactors. In production of drinking water, both heterotrophic and autotrophic bacteria are used. Since the bacteria are not allowed to enter the supply network, fixed reactors or other reactors with immobilised biomass are used. Sand bed filters are still necessary to retain compounds from the water after denitrification. 相似文献
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Evaluation of nitrogen reduction in water hyacinth ponds integrated with waste stabilization ponds 总被引:2,自引:0,他引:2
In this paper, a combined aquatic treatment process coupling waste stabilization ponds (WSPs) with water hyacinth ponds (WHPs) was investigated as means to upgrade secondary effluent from a waste water treatment plant (WWTP). Naturally-occurring nitrification and denitrification phenomena were monitored and evaluated on a quantitative basis. The WSP supplied oxygen to the post process WHP, while the inside of the WHP provided a unique denitrification environment caused by respiration and biodegradation of the algae separated by hyacinth plant roots. The nitrification and denitrification rates were 0.04 and 0.02 g/kg day at 20 °C (wet weight basis), respectively, and were strongly affected by seasonal change. The temperature-dependent coefficients Θ were 1.06, which were approximately similar to frequently reported values from other biological nitrogen removal studies. Nitrification and denitrification were expected to occur as the water temperature was maintained between 20° to 30 °C. As plant density increased, their rates were also enhanced. Alkalinity balance corresponded fairly well with nitrogen behaviour during most of the operational period. Oxygen balance test results validated that the water hyacinth was crucial not only for separating algal particles from the WSP, but also for biological nitrogen reduction. 相似文献