环境保护科学2017，Vol.43Issue(2)：35-40,6.DOI:10.16803/j.cnki.issn.1004-6216.2017.02.007
活性污泥胞外聚合物的组成与结构特点及环境行为
Chemical Structure and Environmental Behavior of Extracellular Polymeric Substances in Sludge: A Review
摘要
Abstract
In the traditional activated sludge process, most of the microorganisms are existing as suspended flocs in the units of wastewater treatment plants. Extracellular polymeric substance (EPS), as a significant component in sludge flocs, plays a very important role in the sewage biological system for its unique polymeric structure and chemical composition. With the aim at describing the environmental behavior of EPS in a better way, on the basis of summarization of the typical results of various literatures, the origin, chemical composition and structure distribution of EPS is analyzed firstly. It is found out that protein, polysaccharide, humic acid, nucleic acid, uronic acid, lipids and other chemical substances are the main components of EPS, with protein and polysaccharide accounting for 70~80% of the total organic content. In the terms of structure, EPS are divided into SB-EPS, LB-EPS and TB-EPS. These three fractions are binding tightly with the cells and their various chemical compositions lead to different physical and chemical properties of EPS. Furthermore, the effects of the above characteristics of EPS on the sewage disposal process such as microbial degradability, phosphorus adsorption and heavy metals removal are discussed. Then, contribution of relative functional groups of EPS to the above environmental behaviors is summarized. Meanwhile, the effects of hydrophobic/hydrophilic features and chemical compositions of the functional groups of EPS on the dewaterbility and flocculation of sludge flocs are also illustrated.关键词
胞外聚合物(EPS)/生物降解性/生物除磷/重金属吸附/污泥特性Key words
Extracellular Polymeric Substance(EPS)/Biodegradability/Biological Phosphorus Removal/Heavy Metal Adsorption/Sludge Characteristics分类
资源环境引用本文复制引用
宋悦,魏亮亮,赵庆良,王胜,王琨..活性污泥胞外聚合物的组成与结构特点及环境行为[J].环境保护科学,2017,43(2):35-40,6.基金项目
国家水体污染控制与治理科技重大专项(2012ZX07201003-002)基金资助 （2012ZX07201003-002）
