Variations of both bacterial community and extracellular polymers: The inducements of increase of cell hydrophobicity from biofloc to aerobic granule sludge

被引：86

作者：

Guo, Feng ^{[1
]}

Zhang, Sheng-Hua ^{[1
]}

Yu, Xin ^{[1
]}

Wei, Bo ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2011年 / 102卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Aerobic granular sludge; Hydrophobicity; Biofloc; Bacterial community; Extracellular polymer; BIOLOGICAL PHOSPHORUS REMOVAL; MICROBIAL-POPULATION DYNAMICS; SEQUENCING BATCH REACTORS; ACTIVATED-SLUDGE; START-UP; SUBSTANCES; IDENTIFICATION; HYDROCARBONS; EXTRACTION; OIL;

D O I：

10.1016/j.biortech.2011.03.046

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

To investigate the inducements of increase of cell hydrophobicity from aerobic biofloc (ABF) and granular sludge (AGS), in this study, as the first time the hydrophilic and hydrophobic bacterial communities were analyzed independently. Meanwhile, the effect of extracellular polymers (EPS) on the cell hydrophobicity is also studied. Few Bacteroidetes were detected (1.35% in ABF and 3.84% in AGS) in hydrophilic bacteria, whereas they are abundant in the hydrophobic cells (47.8% and 43% for ABF and AGS, respectively). The main species of Bacteroidetes changed from class Sphingobacteria to Flavobacteria in AGS. On the other hand. EPS is directly responsible to cell hydrophobicity. For AGS, cell hydrophobicity was sharply decreased after EPS extraction. Both quantity and property of the extracellular protein are related to hydrophobicity. Our results showed the variation of cell hydrophobicity was resulted from variations of both bacterial population and EPS. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：6421 / 6428

页数：8

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