Municipal wastewater treatment stetem combiring the JMS and UBF

由于城市污水中大部分污染物与颗粒有关，颗粒直接分离是降低污水污染物水平的有效途径。然而，需要额外的生物氧化来去除残留的可溶性有机化合物和氨氮。在此基础上，有必要开发一种经济有效的由心理化学和生物方法组成的城市污水处理系统，以满足更严格的出水标准。本课题对射流混合分离器（JMS）作为物化处理单元工艺对城市污水进行了化学处理的实验研究。同时发生絮凝和沉淀的JMS在水力停留时间不到1小时的情况下产生了SS和磷浓度较低的出水。粒径大于0.1 μ m的TOC的去除效率也很高。然而，JMS废水需要进行生物处理以氧化可溶性有机化合物和氨氮。本项目采用上流式生物滤池（UBF）作为生物单元工艺。它由一个矩形的水箱组成，槽内沿纵向插入不锈钢网。在滤网上制备了吸附颗粒污染物、氧化有机物和氨氮的生物膜。氧气通过过滤器外的SPG（Sirasu多孔草）曝气器供应。供气量与处理废水的最小比例为2左右，以维持过滤器的好氧状态。它比活性污泥法要小得多。当附着在不锈钢网上的生物量约为2000 ppm时，在水力停留5小时后，处理后的废水中TOC和SS的浓度约为10 ppm。本研究项目还对JMS与UFR组合系统的城市污水处理效率进行了研究，该系统可作为一个单元工艺进行生物处理。该组合系统在水力停留时间短（小于5小时）的情况下，生产出TOC、磷和SS浓度极低的出水，性能非常好。少

Since the major part of contaminants in municipal wastewater Is associated with particles, direct particle separation Is an effective way of lowering wastewater contaminant levels. Ilowever, an additional biological oxidation Is required to remove the residual soluble organic compounds and ammonia nitrogen. Based on the above, it is necessary to develop an economical and effective municipal wastewater treatment system composed of psyco-chemieal and biological methods to meet more strict effluent standards.In this research project, experimental study was carried out on the chemical treatment of municipal wastewater using the Jet Mixed Separator(JMS)which can be used as a unit process for physics-chemical treatment. The JMS, In which simultaneous flocculation and sedimentation occur, produced an effluent with low SS and phosphorous concentrations at a hydraulic retention time of less than 1 hour. Removal efficiency of TOC associated with particles of more than 0.1mum size was also high. … More However, the JMS effluent needs to be biologically treated to oxidize soluble organic compounds and ammonia nltrigen.In this project an Upflow Biofilter(UBF)was used as a biological unit process. It consists of a rectangular tank wlth stainless nets horoiontally Inserted. On the nets biofilms were developed which adsorbed particulate contaminants and oxidized organic compounds and ammonia nitrogen. Oxygen was suppled through a SPG(Sirasu Porous Grass)aerator out side the filter. The minimum ratio of supplied amount of air to treated wastewater was around 2 to maintain the filter to be aerobic. It is much smaller than that in activated sludge processes. The concentration of TOC and SS in the treated wastewater was about 10 ppm in a hydraulic retention time of 5 hours when the biomass attached to the stainless nets was around 2000 ppm.This research project was also conducted the municipal wastewater treatment efficiency of the system combining of the JMS and the UFR which can be used as a unit process for biological treatment. The performance of the combined system was very high in producing the effluent with very low concentrations of TOC, phosphorous and SS at a short hydraulic retention time of less than 5 hours. Less