废纸脱墨废水絮凝-生化二级处理的研究

采用絮凝-生化二级处理的方法对废纸脱墨废水进行处理，通过测定废水中的SS、BOD5及CODCr等指标，研究了脱墨废水在絮凝及生化处理时的规律。结果表明：在脱墨废水的絮凝处理中，pH值、沉降时间、絮凝剂用量等均会影响沉降效果，二元絮凝方式沉降效果较好，在适当的条件下进行絮凝处理后，脱墨废水中SS、CODcr、BOD5的去除率可分别达到97．1％、71．6％、56．1％；经絮凝处理后的脱墨废水适合于用生物活性污泥法处理，较好的处理条件为接种量120mg／L，暖气时间4～6h，此时，CODcr、BOD5的去除率均可达90％以上，且连续运行也可以达到间歇操作的效果。

Treatment of Deinking Waste-water by coagulation and Activated Sludge

Treatment of deinking waste-water with chemical coagulation and activated sludge method is investigated. SS,BOD5 and CODCr, of deinking waste-water are determined. Satisfactory results of removing 93.5%SS, 19. 8% BOD5 and 65. 0% CODcr are claimed for the coagulation stage ; whereas during the second stage of activated sludge treatment, removals of BOD, and CODCr are reported to be more than 50% and 70% respectively. It is also confirmed that continuous operation of activated sludge is feasible.