Role of extracellular polymeric substances in enhancement of phosphorus release from waste activated sludge by rhamnolipid addition

被引：45

作者：

He, Zhang-Wei ^{[1
]}

Liu, Wen-Zong ^{[2
]}

Wang, Ling ^{[1
]}

Yang, Chun-Xue ^{[1
]}

Guo, Ze-Chong ^{[1
]}

Zhou, Ai-Juan ^{[3
]}

Liu, Jian-Yong ^{[4
]}

Wang, Ai-Jie ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China

[2] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China

[3] Taiyuan Univ Technol, Coll Environm Sci & Engn, Taiyuan, Peoples R China

[4] Shanghai Univ, Sch Environm & Chem Engn, Shanghai, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2016年 / 202卷

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

Extracellular polymeric substances; Phosphorus release; Waste activated sludge; Rhamnolipid; Species; GRANULAR SLUDGE; RECOVERY; ASH; EPS; DEWATERABILITY; FERMENTATION; EXTRACTION; SURFACTANT; CHINA; ACID;

D O I：

10.1016/j.biortech.2015.11.086

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study investigated the role of extracellular polymeric substances (EPSs) in enhanced performance of phosphorus (P) release from waste activated sludge (WAS) by adding rhamnolipid (RL). Results showed that compared to WAS without pretreatment, the released PO43 -P increased with RL addition from 0 to 0.2 g/g TSS (total suspended solid), and increased by 208% under the optimal condition (0.1 g RL/g TSS and 72-h fermentation time). The cumulative PO43 -P was better fitted with pseudo-first-order kinetic model. Moreover, the contents of metal ions increased in liquid but decreased in EPSs linearly with RL addition increasing, and WAS solubilizations were positively correlated with the released metal ions. The enhanced total dissolved P mainly came from cells and others (69.39%, 2.27-fold higher than that from EPSs), and PO43 -P was the main species in both liquid and loosely bound EPSs, but organic P should be non-negligible in tightly bound EPSs. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：59 / 66

页数：8

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