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 1; Yang, Wenfeng 1,4; Yang, Qiyong 2,3,4; Wang, Tianfeng 3,4; Chen, Shenliang 4; Zou, Moliang 4; Yang, Zengye 4
刊名	Water Science and Technology
	2018-07-17
卷号	2017 期号:3 页码:802-811
关键词	Bacteria Filtration Proteins Redox reactions Capillary suction time Different proportions Extracellular polymeric substances Geological materials Oxidation reduction potential Sludge dewaterability Sludge dewatering Specific resistance to filtration
ISSN号	02731223
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. © 2018 IWA Publishing. All rights reserved.
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
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150573]
专题	石油化工学院
作者单位	1.College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou Gansu; 730050, China; 2.Poyang Lake Eco-economy Research Center, Jiujiang University, Jiujiang Jiangxi; 332005, China; 3.Key Laboratory of Basin Management and Ecological Protection, Jiujiang University, Jiujiang Jiangxi; 332005, China; 4.College of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang Jiangxi; 332005, 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,2018,2017(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,2017(3),802-811.
MLA	Zhang, Qingfang,et al."Effect of using different proportions of inoculum during bioleaching on sludge dewaterability".Water Science and Technology 2017.3(2018):802-811.