混凝／微滤去除滦河水中不同分子质量有机物的效果

Removal Effect of Organics with Different Molecular Weights from Luan River Water by Coagulation/Microfiltration Process

采用混凝／微滤工艺处理滦河水，以DOC、UV254、THMFP为指标考察了处理前、后水中有机物的分子质量分布。结果表明，原水中的有机物以溶解性小分子有机物为主，该部分有机物是生成THMs的主要物质，其中分子质量为1～3ku的有机物生成THMs的能力最强；混凝／微滤工艺对分子质量〉10ku的DOC的去除效果较好，在各个分子质量区间，对UV254的去除率均高于对DOC的；系统对THMFP的去除率约为40％。

Coagulation/microfiltration process was applied to treat Luan River water. Taking dissolved organic carbon （ DOC）, UV254 and THMFP as indexes, the molecular weight （MW） distribution of organic matters in raw water and treated water were investigated. The results show that the dissolved organic matters with low MW are the main organic matters in the raw water, and they are the major matters which can form THMs. The organic matters with MW of 1 to 3 ku have the greatest capacity of forming THMs. The DOC with MW of more than 10 ku is removed by coagulation/microfiltration process effectively. The removal rate of UV254 is better than that of DOC in various MW ranges. The removal rate of THM- FP is nearly 40%.