曝气生物滤池法处理工业用微污染水源水

Treatment of Slightly Contaminated Industrial Source Water by Using Biological Aerated Filter

对采用曝气生物滤池加混凝沉淀的联合工艺和直接混凝沉淀工艺处理受污染水源水进行了对比试验.结果表明,当微污染水源水CODCr为20～28 mg/L、氨氮浓度为5.2～6.7 mg/L、浊度为8～18 NTU、藻类数量为150～350万个/L时,联合工艺处理的出水CODCr、氨氮浓度、浊度可分别稳定在10 mg/L、0.6 mg/L和2 NTU以下,藻类去除率达90％以上.与直接混凝沉淀处理相比,采用联合工艺处理微污染水源水对污染物尤其是藻类的去除效果大为提高,而且可节省45％的混凝剂.

Two processes for treating slightly contaminated source water, namely, the combinative process by flocculation and biological aerated filter and the single flocculation process, were experimentally compared. The results show that, when the CODCr of the source water, the mass concentration of NH3-N and the turbidity are respectively 20 -28mg/L, 5.2 -6.7mg/L and 8 -18NTU, with 1.5 -3.5 million algae in per liter source water, the combinative process can help decrease the corresponding values of the effluent by less than 10mg/L, 0. 6 mg/L and 2 NTU and that the efficiency of the combinative process to remove the contamination (especially the algae) is much better than that of the single flocculation process, and that the combinative process can remove 90% algae and save 45% flocculant.