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Municipal wastewater treatment stetem combiring the JMS and UBF

JMS与UBF相结合的城市污水处理系统

基本信息

批准号：
02650384
负责人：
WATANABE Yoshimasa
金额：
$ 1.41万
依托单位：
Miyazaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

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

由于城市污水中污染物的主要部分与颗粒有关，直接颗粒分离是降低污水污染物水平的有效方法。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。因此，有必要开发一种经济、有效的物化-生物联合处理城市污水的系统，以满足日益严格的污水排放标准，本课题采用射流混合分离器（JMS）作为物化处理单元工艺，对城市污水进行了化学处理的试验研究。的JMS，其中同时发生絮凝和沉淀，产生了低SS和磷浓度的出水在水力停留时间小于1小时。与粒径大于0.1 μ m的颗粒相关的TOC的去除效率也很高。 ...更多信息然而，JMS废水需要生物处理，以氧化可溶性有机物和氨氮。它是由一个长方形的不锈钢网槽组成。在网片上形成了吸附颗粒污染物、氧化性有机物和氨氮的生物膜。通过过滤器外的SPG（Sirasu Porous Grass）供应氧气。空气供应量与处理过的废水的最小比率为约2，以保持过滤器为需氧的。它比活性污泥法中的小得多。当不锈钢网上附着的生物量为2000 ppm左右时，在5 h的水力停留时间内，处理后的废水中TOC和SS浓度约为10 ppm。本研究还考察了JMS与UFR组合系统作为生物处理单元工艺对城市污水的处理效果。该组合系统的性能非常高，在生产的TOC，磷和SS的浓度非常低，在短的水力停留时间小于5小时的流出物。少