混凝超滤组合工艺深度处理市政污水试验

以氧化沟工艺二沉池出水和序批式活性污泥工艺二沉池出水为原水,分别采用絮凝-砂滤-超滤和直流混凝-超滤的预处理工艺。结果表明,2种工艺处理出水的污泥密度指数小于2,浊度达到0.04￣0.1NTU,对CODCr去除率在20%￣60%,并在一定程度上降低了氨氮、总磷等污染物的质量浓度。污泥密度指数,浊度与产水量均达到了反渗透进水水质的要求。

Test of advanced treatment of municipal wastewater by coagulation-ultrafiltration combined process

Effluent water from secondary settling tanks of oxidation ditch process and sequence batch reactor process was used as raw water, and be treated by pretreatment process flocculation-sand filtration-ultrafiltration and direct current coagulation-ultrafiltration respectively. The results show that: the sludge density index of the effluent water through the treatment of the two processes is below 2, reaches 0.04 - 0.1 NTU; the removal rate of CODCr is 20% - 60%, meanwhile, the mass concentration of ammonia nitrogen, total phosphorous and some other pollution are also decreased to some extent. The sludge density index, the turbidity, and the water making quantity all meet the demand for the quality of reverse osmosis influent water.