文献类型：期刊文献

中文题名：生化出水中各类有机污染物的特性及在混凝处理过程中的行为

英文题名：Characterization of Residual Organic Pollutants in Secondary Effluent and Their Behavior During Coagulation Process

作者：龚剑丽[1];刘勇弟[1];孙贤波[1];陈丽洁[1]

机构：[1]华东理工大学资源与环境工程学院,上海200237

年份：2008

卷号：34

期号：1

起止页码：91

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：20081311171219);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：高等学校博士学科点专项科研基金资助(20060251014)

语种：中文

中文关键词：二级生化出水;溶解性有机物;深度处理;混凝法

外文关键词：secondary effluent; dissolved organic matter （DOM）; advanced treatment; coagulation process

摘要：以城市生活污水厂二级生化出水为研究对象,考察了生化出水中有机污染物中各组分含量、分子量分布特点等特性,以及各类有机物在三氯化铁混凝处理过程中的行为。实验结果表明:当生化出水中有机物浓度以DOC表征时,水中疏水性物质与亲水性物质各占50%,其中疏水酸浓度最高,约为42%,其次为亲水酸和非酸亲水物质,分别占26%和24%,非酸疏水物质仅为8%。其中疏水酸中的不饱和双键或芳香环有机物的含量较高。二级生化出水中的DOC主要集中在分子量大于10 000 D的有机物,占48.8%。在三氯化铁混凝过程中,能去除几乎所有的大分子量有机物以及大部分芳香族有机物(61%的UV254),对小分子、亲水性有机物基本没有去除效果。因此,混凝法需与其他能去除亲水性、小分子量有机物(<3 000 D)的处理工艺结合,以进一步提高有机物的去除效率。
Experiments were performed to characterize the biotreated secondary effluent of a Shanghai municipal wastewater treatment plant and to study the removal of its major organic constituents in coagulation/precipitation treatment. The hydrophobic and hydrophilic organic fractions each accounted for about 50% of DOC of the secondary effluent samples. Hydrophobic acids were the largest group accounting for 42%,followed by hydrophilic acids and non-acid hydrophilic matters at 26% and 24%, respectively; nonacid hydrophobic matters at 8% were the smallest group. Hydrophobic acids had high aromatic carbon contents. Organic compounds of very high molecular weightC〉10 000 D） were the largest fraction（48.8% of DOC） of the total dissolved organic matters. Nearly all of the large molecules and a major portion of hydrophobic matters（61% of UV254） were removed by coagulation/precipitation using ferric chloride as the coagulant. Coagulation/precipitation of biotreated municipal wastewater followed by additional treatment steps to remove the remaining（mostly molecular weight〈3 000 D） organic constituents will produce a high quality final effluent suitable for many reuses.