生物膜氧化沟污水处理性能的研究

生物膜氧化沟是在普通氧化沟内放置合适填料，使之成为活性污泥法与生物膜法相结合的混合污水处理工艺。本研究通过清水试验，选择出了生物膜氧人诉合适填料及其安装方式，并同时比较了生物膜氧化沟和普通氧化沟的传质效果，水流阻力、水力混合特性。通过污水试验，确定了生物膜氧化沟的填料最佳填充率。并比较了生物膜氧化沟和普通氧化沟的去除ＣＯＤ、ＳＳ、ＴＮ效率及两者的污泥性能。

Study on Waste-water Treatment Performance of Biofilm Oxidation Ditch

The Biofilm Oxidation Ditch is a hybrid waste-water treatment process that combines Active Sludge Process and Biofilm Process by installing media in an oxidation ditch. To study Biofilm Oxidation some experiments with tap water and waste-water were conducted.An appropriate media of the Biofilm Oxidation Ditch and its suitable installation pattern were decided in the test of tap water. In the same time , the mass transfer efficiency, resistance of water flow and hydraulic mixing characteristics of Biofilm Oxidation Ditch were compared with them of conventional Oxidation Ditch. On the basis of the experiments with waste water, the appropriate installation density of the media was also decide and the removal rates of COD-, SS and TN of Biofilm Oxidation Ditch were compared with them of conventional Oxidation Ditch. Moreover, both of the specialities of suspended solid in Biofilm Oxidatiom Ditch and those of Active Sludge in conventional Oxidation Ditch were studied.