（毕业设计论文）《AAO+MBR组合工艺脱氮除磷性能研究》.doc

PAGE 苏州科技学院本科生毕业论文 AAO+MBR组合工艺脱氮除磷性能研究 摘 要 膜生物反应器（Membrane Bio-reactor，MBR）技术具有传统方法所不及的许多优点，具有很好的应用前景，但高能耗、膜污染是影响MBR工艺推广应用的主要障碍。我们从曝气方式入手采用射流曝气膜生物反应器加抽吸泵，取代了鼓风机。通过近100天的试验研究此新型MBR系统在处理人工合成污水的效果以及可能遇到的问题；通过研究溶解氧、SRT 、HRT、混合液回流比、MLSS对C、N、P的降解性能，确定DO、SRT、HRT、污水回流比等运行参数，并且分析污泥形态对污染物去除效率的影响。经试验证明：在处理人工合成废水期间，系统对CODCr的去除率均大于85%，对NH3-N去除率也基本保持在95%以上，同时选取适宜的硝化液回流比时，总氮的去除率均高于70%，而且出水无色无味，浊度均小于1NTU。在考察射流曝气对污泥形态的影响时发现：采用射流曝气时，在水泵高强度剪切力和射流曝气强紊流的共同作用下，好氧池内污泥变得十分松散和细碎，这种状态严重影响了污泥的沉降性能，但却更加有利于反应器内污染物的降解。另外，本实验对膜组件清洗前后膜通量的变化以及出水水质的变化也做了系统的概括。 关键字 膜生物反应器；射流曝气；膜污染；污泥形态 苏州科技学院本科生毕业论文 Research on Treatment of Wastewater by Improved Membrane Bio-reactor Abstract Membrane bioreactor (MBR) technology has many advantages beyond with traditional methods, It has the very good application prospect, but energy-intensive, Membrane fouling process is the main application of the MBR obstacles. We adopted from the aeration of aeration membrane bioreactors and suction pump, replaced the blower. Through the experimental study of nearly 100 days in this new system with artificial synthesis MBR sewage effect and the possible problems, Through the research of oxygen, revamp, HRT, mixture of backflow MLSS ratio, the C and N, P, degrade the performance DO, revamp, HRT, sewage reflux ratio etc, and analysis of operation parameters of pollutant removal efficiency of sludge form. The test shows: in dealing with the synthetic wastewater, the system CODCr during the removal rate are greater than 85% of NH3 - N efficiency, also maintains in 95%, selecting suitable nitrification, liquid reflux ratio of total nitrogen removal rate are higher than 70%, and the effluent turbidity, colorless, odorless and 1NTU are less. In examining the aeration of sludge form when the effect that: the aeration, high intensity in the pump shearing force and aeration strong turbulence, anaerobic sludge pool became very loose and finely, this state of serious impact on the sludge sedimentation performance, but more conducive to