粉末离子交换树脂法提取印染污泥胞外聚合物(EPS)  

Study on Extraction of Extracellular Polymeric Substances(EPS) from Dyeing Wastewater Treatment Sludge with Powder Cation Exchange Resin

作　　者：戴莹[1] 张显球[2] 杜明霞[2] 刘青[2] 张勇[2] 许崇正[3] 

机构地区：[1]南京师范大学能源与机械工程学院,江苏南京210042 [2]南京师范大学地理科学学院,江苏南京210023 [3]南京师范大学中国经济研究中心,江苏南京210039

出　　处：《南京师范大学学报（工程技术版）》2013年第3期62-66,共5页Journal of Nanjing Normal University(Engineering and Technology Edition)

基　　金：江苏省环保厅科研课题(2012013);南京师范大学高层次人才启动基金(2011105XGQ0084);水利部公益性行业专项经费项目(201201018)

摘　　要：阳离子交换树脂法是一种常用的提取污泥EPS的方法,所采用的树脂多为颗粒树脂,鲜见粉末树脂的应用.实验研究了粉末树脂对印染污泥EPS的提取,考察了pH值、投加量以及交换时间对EPS提取量的影响.结果表明,随着pH值、树脂投加量的增加,以及延长交换时间,均有利于EPS的提取量的增加;实验得出的最佳提取条件为pH 9,投加量40 g/g MLSS,交换时间3 h.在此条件下,实验对比了粉末树脂法和颗粒树脂法的提取结果,表明粉末树脂法具有提取量大、交换速度快等优点,提取效果优于颗粒树脂法.Cation exhange resin （CER） is widely used in the extraction of EPS, and the kind of CER mostly used is granular CER, powder CER haven＇t been referred to in present researches. This study is about extracting EPS with powder CER, and mainly focuses on the effects of pH, amount of CER input, and time for ion exchange on extractions. The result shows that the growths of these variables lead to more EPS being extracted. Based on experiments, the most favorable pre- requisite for extraction has been acquired which is a condition with pH value 9,40 g/g MLSS CER input and 3 hours lasted for exchange. The comparison between the effects of granular CER and powder CER on extraction is carried out under the most favorable condition mentioned before. The result confirms that powder CER can extract more EPS with less time. Therefore, using powder CER is a better method for EPS extraction.

关 键 词：EPS 印染污泥 离子交换树脂 粉末树脂 

分 类 号：X703.1[环境科学与工程—环境工程]