化学强化一级处理工艺处理上海合流污水溢流水的中试研究

Pilot Scale Experiment on Chemically Enhanced Primary Treatment(CEPT) for Combined Sewer Overflows(CSOs) in Shanghai

针对上海合流污水溢流水污染的问题,探讨化学强化一级处理工艺处理溢流污水的可行性,中试装置总体积18.45 m^3。试验针对三种污水进行了研究,包括旱天污水、中小强度降雨的合流污水、暴雨合流污水。研究结果表明采用化学强化一级处理工艺可以有效地处理雨天合流污水溢流(combined sewer overflows,CSOs)。对COD和TP的去除率在50%～80%,对SS的去除率高达70%～90%。中试装置的启动时间在15 min左右,可以满足处理雨天溢流的要求。

Feasibility of chemically enhanced primary treatment （CEPT） for combined sewer overflows （CSOs） in Shanghai was investigated by a pilot-scale experimetal setup with 18.45 m^3 working volume. Three types of sample such as raw wastewater on dry days, combined sewage under medium rainfall and combined sewage under heavy rainfall were tested. The results show CEPT is effective in treating overflows on rainy days. Removal effiencies of COD and TP were 50 %-80 %. Removal effiency of SS is the highest, whose range was 70 %-90 %. Start-time of the pilot-scale experimetal setup was 15 min or so, which suffices treating overflows on rainy days.