中文摘要：

采用无机混凝剂聚合氯化铝（PAC）、FeCl3和巴斯夫系列的聚丙烯酰胺（PAM）对污水处理厂的污泥进行化学调理,通过测定污泥毛细吸水时间（CST）、粒径、Zeta电位、结合水含量以及不同胞外聚合物（EPS）组分,研究了不同混凝剂调理对污泥脱水性的改善效果及其作用机制。研究表明：化学调理污泥时PAC和FeCl3所需的投加量远高于PAM,而且调理效果较差;PAM调理后,污泥粒径明显上升,远大于PAC或FeCl3调理后的污泥粒径;污泥调理过程中,粒径的变化与CST没有表现出明显的相关性。此外,絮凝调理过程主要通过压缩污泥EPS结构,促使储存在其中的部分水分释放出来,从而降低结合水含量。

英文摘要：

The inorganic coagulants （PAC,FeCI3） and different types of Zetag PAM were used as sludge condi- tioners,and CST, floc size, zeta potential, bound water content and different EPS fractions were analyzed to evaluate the sludge conditioning efficiency of different chemicals and find out the mechanisms involved. The result showed that not only the dosage of PAC and FeCl3 were far outweigh than PAM,but the efficiency was poorer than that of PAM. The sludge particle size was significantly increased with addition of PAM, which was much larger than that formed from PAC and FeCl3 flocculation. No significaat correlation can be found between floc size and sludge dewaterability. In addition, the sludge dewaterability was improved by compressing EPS structure under flocculation conditioning, fa- cilitating partial release of water trapped in EPS,consequently resulting in reduction of bound water content.