期刊
WATER SCIENCE AND TECHNOLOGY
卷 71, 期 7, 页码 1106-1112出版社
IWA PUBLISHING
DOI: 10.2166/wst.2015.043
关键词
extracellular polymeric substances (EPS); extraction method; microbial aggregate; three-dimensional fluorescence spectrum technology
资金
- National Natural Science Foundation of China [51478416, 51008269]
- Natural Science Foundation of Zhejiang province [LY13E080003]
- Zhejiang province [2014C33017]
- Fundamental Research Funds for the Central Universities
The extracellular polymeric substances (EPS) are important macromolecular components in microbial aggregates. The three EPS extraction methods - ultrasound + cation exchange resins (CER) + sulfide, ultrasound + formamide + NaOH, and ultrasound + heat - were investigated in the study, and the component differences of extracted EPS from the loose flocs and dense aerobic granules were compared using chemical analysis and three-dimensional excitation-emission matrix (3D-EEM). Results showed that the contents of EPS were extracted effectively by ultrasound + formamide + NaOH and ultrasound + heat methods, and the ultrasound + CER + sulfide method did not extract the polysaccharides (PS) or protein (PN) contents from the sludge samples. The 3D-EEM analysis indicated that the nature of peak B/D, peak C/E/F, and peak A/G were attributed to PN-like, humic acid-like and fulvic acid-like fluorophores. All fluorophores can be detected from the EPS extracted through the ultrasound + heat method. Hopefully this will provide more information about the EPS interaction mechanism of microbial aggregates.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据