Effect of using different proportions of inoculum during bioleaching on sludge dewaterability

doi:10.2166/wst.2018.234

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Effect of using different proportions of inoculum during bioleaching on sludge dewaterability
	Zhang, Qingfang 2; Yang, Wenfeng 2,3; Yang, Qiyong 1,3,4; Wang, Tianfeng 3,4; Chen, Shenliang 3; Zou, Moliang 3; Yang, Zengye 3
刊名	WATER SCIENCE AND TECHNOLOGY
	2018-07
卷号	77 期号:3 页码:802-811
关键词	bioleaching extracellular polymeric substances sludge dewaterability
ISSN号	0273-1223
DOI	10.2166/wst.2018.234
英文摘要	Bioleaching, the addition of bacteria to geological materials, has been applied to sludge to remove metals and improve upon sludge dewaterability. This paper investigates the effect of using different quantities of inoculum (bacteria) during bioleaching on sludge dewaterability. The analysis was based on bioleaching experiments conducted in a 20 L bio-reactor using different quantities of inoculum (20%, 10%, 5%, 2%, 0%). Changes in pH, oxidation reduction potential (ORP), capillary suction time (CST), specific resistance to filtration (SRF) and extracellular polymeric substances (EPS) were determined to gauge sludge dewatering. Results indicate that sludge dewaterability during the 2%, 10%, and 20% inoculum experiments declined through time. Decreased dewaterability is attributed to increases in the quantity of proteins and polysaccharides in slime EPS. Dewaterability improved during the 5% inoculum experiment, and reached a maximum when pH was 2.3. During this latter experiment, CST and SRF were reduced by 74% and 62%, respectively, in comparison to control conditions, while total EPS content decreased by 71%. The decrease in total EPS was primarily due to a decrease in proteins associated with tightly bound EPS (TB-EPS). Thus, changes in the amount of proteins in TB-EPS and sludge pH played a crucial role in sludge dewaterability.
资助项目	Science and Technology Program of Education Department of Jiangxi Province, China[GJJ14732]
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	IWA PUBLISHING
WOS记录号	WOS:000445523400019
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32584]
专题	石油化工学院
通讯作者	Yang, Qiyong
作者单位	1.Jiujiang univ, Poyang Lake Ecoecon Res Ctr, Jiujiang 332005, Jiangxi, Peoples R China 2.Lanzhou Univ Technol, Coll Petrochem Engn, Lanzhou 730050, Gansu, Peoples R China 3.Jiujiang Univ, Coll Chem & Environm Engn, Jiujiang 332005, Jiangxi, Peoples R China 4.Jiujiang Univ, Jiujiang Key Lab Basin Management & Ecol Protect, Jiujiang 332005, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qingfang,Yang, Wenfeng,Yang, Qiyong,et al. Effect of using different proportions of inoculum during bioleaching on sludge dewaterability[J]. WATER SCIENCE AND TECHNOLOGY,2018,77(3):802-811.
APA	Zhang, Qingfang.,Yang, Wenfeng.,Yang, Qiyong.,Wang, Tianfeng.,Chen, Shenliang.,...&Yang, Zengye.(2018).Effect of using different proportions of inoculum during bioleaching on sludge dewaterability.WATER SCIENCE AND TECHNOLOGY,77(3),802-811.
MLA	Zhang, Qingfang,et al."Effect of using different proportions of inoculum during bioleaching on sludge dewaterability".WATER SCIENCE AND TECHNOLOGY 77.3(2018):802-811.