【作者】 王道泉；

【导师】 闻建平；

【作者基本信息】 天津大学 ， 生物化工， 2006， 硕士

【摘要】 我国城市污水处理厂80％以上都采用活性污泥法处理城市污水，经这些污水处理厂处理后过的城市废水存在剩余污泥量大、除磷脱氮效果不稳定、占地面积大、能耗大、处理费用高等缺点。研究开发高效、经济、实用、低耗的城市污水除磷脱氮新技术己成为水污染控制工程领域的研究重点和热点。．在本研究中，以天津市纪庄子污水处理厂城市废水为研究对象，分别采用悬浮式生物处理系统和菌体固定化生物处理系统，将传统A2/O工艺中的J犬氧和缺氧工段倒置，按照缺氧一厌氧一好氧工段次序，取消A2/O工艺中的内回流，进行生物脱氮除磷的研究。研究过程中首先分别针对好氧、缺氧、厌氧三个工段进行单独研究，并分别获取三个工段脱氮除磷的最优化操作条件。最后，将两种处理系统的三个工段按照一定的匹配关系进行系统耦合。将耦合系统的各个工段在最优化条件下进行操作，获得两种耦合系统对污水中氮、磷、COD等污染物的去除效果。从两种系统的运行状况来看，经处理后的城市废水，两种处理系统出水氮、磷、COD等污染物指标均可达到国家城市污水处理厂污染物排放标准(GB18918—2002)中的一级标准，但菌体固定化生物处理系统对氮、磷和COD等污染物的去除率要高于悬浮式生物处理系统。更多还原

【Abstract】 Today, in China, eighty percent of the wastewater treatment plants adopt active sludge method. But there are many shortcomings with these wastewater treatment plants, such as plentiful sludge being remained, unsteady removing state of nitrogen and phosphorus, large area being taken up, large energy sources being consumed and large cost etc. The research for effective, economic, low cost new technology of nitrogen and phosphorus removing becomes more and more urgent in wastewater treatment field.Based on the traditional A2/O process, the anoxic/anaerobic/oxic process without inner circumfluence has been developed with municipal wastewater as treatment aim from Tianjin Jizhuangzi wastewater treatment plant in our research. The removing efficiency of nitrogen and phosphorus has been researched with suspended bacteria and fixed bacteria methods, in respectively. Firstly, the research for aerobic, anoxic and anaerobic section has been developed. Accordingly, the optimum control condition for every section has been acquired. Finally, two systems by coupling of three sections were considered and the removal efficiency for nitrogen, phosphorus and COD has been reviewed under the optimum control condition.As a result, we can conclude that the effluent nitrogen, phosphorus and COD concentrations could meet with the first-grade discharge standard of pollutants for municipal waster treatment plant GB 18918-2002 with two systems and the removal efficiency of fixed bacteria was higher than suspended bacteria method.更多还原