Weakened adhesion force between extracellular polymeric substances of waste activated sludge caused by rhamnolipid leading to more efficient carbon release

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院环境生物技术重点实验室

	Weakened adhesion force between extracellular polymeric substances of waste activated sludge caused by rhamnolipid leading to more efficient carbon release
	Li, Jiaqi ; Liu, Wenzong ; Ren, Ruiyun ; Xu, Dechun ; Liu, Chengyan ; Wang, Bo ; Wang, Aijie
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-11-20
卷号	692 页码:892-902
关键词	Waste-activated sludge (WAS) Extracellular polymeric substances (EPS) Rhamnolipid Adhesion force Kinetics
ISSN号	0048-9697
英文摘要	Rhamnolipid (RL), a biosurfactant produced by bacteria, is investigated to alter the physical characteristics of extracellular polymeric substance (EPS) of waste-activated sludge (WAS), and subsequently promotes hydrolysis and acidogenesis during anaerobic digestion for short chain fatty acids (SCFAs) production. The results revealed that RL could decrease the adhesion force of EPS from 13.46 nN to 1.08 nN, resulting in EPS disintegration layer by layer, decreasing the median particle size by 31.57 mu m and releasing abundant soluble organic matter. The cell number of living bacteria remained stable after RL pretreatment (2.59 x 10(9) vs. 2.66 x 10(9)), indicating that RL has a minimal impact on microbial cells (only similar to 2% bacterial lysis was observed). The kinetic studies of ammonia nitrogen release and SCFA production suggested that, in the RL-pretreated WAS, the reaction rate constants for hydrolysis and acidogenesis were respectively 2-fold and 15-fold higher than those of the control group. (C) 2019 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43412]
专题	生态环境研究中心_中国科学院环境生物技术重点实验室
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, 18 Shuangqing Rd, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Jiaqi,Liu, Wenzong,Ren, Ruiyun,et al. Weakened adhesion force between extracellular polymeric substances of waste activated sludge caused by rhamnolipid leading to more efficient carbon release[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,692:892-902.
APA	Li, Jiaqi.,Liu, Wenzong.,Ren, Ruiyun.,Xu, Dechun.,Liu, Chengyan.,...&Wang, Aijie.(2019).Weakened adhesion force between extracellular polymeric substances of waste activated sludge caused by rhamnolipid leading to more efficient carbon release.SCIENCE OF THE TOTAL ENVIRONMENT,692,892-902.
MLA	Li, Jiaqi,et al."Weakened adhesion force between extracellular polymeric substances of waste activated sludge caused by rhamnolipid leading to more efficient carbon release".SCIENCE OF THE TOTAL ENVIRONMENT 692(2019):892-902.