摘要：

首先介绍了阳离子改性天然高分子絮凝剂的制备，然后，用它对活性污泥进行了脱水处理，并考察了处理效果。研究发现，在pH约为7．5，絮凝剂的分子量为500万，最佳用量为3．0×10-5mg／L，胶化度为33％时，脱水效果最佳，清液达到城市污水处理厂污水污泥排放标准。

关键词: 絮凝剂, 天然高分子, 阳离子型, 活性污泥

Abstract:

In this paper, at first, the preparation of modified naturalhigh polymer cationic flocculant is introduced, Then dehydratedtreatment for activated sludge is studied. The result shows thatit has high dehydrating efficiency at PH = 7.5 and 30 x 10-6mg/L, when its molecular weight is 5000 000, and its aminateddegree is 33%. The water treated from activated sludge can beused again.

Key words: modified, natural polymer, cationic flocculant, activated sludge