摘要：

以某高含盐垃圾渗滤液为研究对象，通过投加混凝剂聚合氯化铝（PAC）和助凝剂聚丙烯酰胺（PAM）对其进行混凝沉淀预处理。单因素试验和正交试验结果表明，最佳混凝条件为PAC投加量为1 050 mg/L，PAM投加量为0.8 mg/L，PAM的投加时间在距离PAC投加之后7 min。在上述最佳处理条件下，原水COD由4 876 mg/L降至2 436 mg/L，COD去除率达50.04%。

关键词: 垃圾渗滤液, 聚合氯化铝, 聚丙烯酰胺, 混凝沉淀

Abstract:

Using landfill leachate containing high salinity as the research object, the composite coagulant consisting of polyaluminium chloride(PAC)and polyacrylamide(PAM) has been added, so as to carry out coagulation and sedi-mentation process for its pretreatment. The results from doing single factor tests and orthogonal experiments show that optimal coagulation conditions are as follows：PAC dosage is 1 050 mg/L, PAM dosage 0.8 mg/L, and PAM adding time seven minutes after the adding of polyaluminium chloride(PAC). Under the above treatment conditions, the raw water COD reduces from 4 876 mg/L to 2 436 mg/L. The removing rate of COD is as high as 50.04%.

Key words: landfill leachate, polyaluminium chloride, polyacrylamide, coagulation and sedimentation

中图分类号: 

• X703.1