Carbon-based materials reinforced waste activated sludge electro-dewatering for synchronous fuel treatment

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Carbon-based materials reinforced waste activated sludge electro-dewatering for synchronous fuel treatment
	Cao, Bingdi ; Wang, Ruilu ; Zhang, Weijun ; Wu, Hanjun ; Wang, Dongsheng
刊名	WATER RESEARCH
	2019-02-01
卷号	149 页码:533-542
关键词	Carbon based materials (CBMs) Electro-osmosis dewatering Extracellular polymeric substances (EPS) Electrochemical reactions Sludge dewatering
ISSN号	0043-1354
英文摘要	Sludge treatment and disposal have become critical environmental issues in China. Electro-dewatering (ED) is an attractive technology for enhancing dewaterability and improving the sustainability of waste activated sludge (WAS) handling. However, electrically assisted mechanical dewatering processes consume more energy and the extracellular polymeric substance (EPS) dissolution caused by electro-chemical reactions can lead to clogging of the filter cloth. Carbon-based materials (CBMs) such as activated carbon and graphite have electrical conductivity and well-developed pore structures which can adsorb the biopolymers. Therefore, addition of CBMs is expected to improve WAS electro-dewatering performance for fuel treatment by enhancing sludge conductivity and filterability. In this study, we evaluated the effects of the three carbon materials (AC-0, AC-5, and graphite) on sludge electro-dewatering behavior and the flammability of sludge cakes. The results showed that CBMs promote the performance of WAS electro-dewatering, and the promoting effect of the carbon materials on the sludge electro-dewatering is proportional to the electrical conductivity of the carbon material, and carbon materials can increase the electrophoretic mobility of sludge flocs and the electro-osmotic effect. Moreover, CBMs can adsorb the dissolved EPS, thus alleviate the plugging and filtration resistance of the filter medium. The addition of CBMs also decreases the energy consumption for water removal during the electro-dewatering process and improves the calorific value and sustainable combustion time of the sludge cake. Our approach can facilitate the resource utilization of the dewatered sludge cake in electro-dewatering processes. (C) 2018 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43066]
专题	生态环境研究中心_环境水质学国家重点实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100085, Peoples R China 3.Wuhan Inst Technol, Sch Chem Engn & Pharm, Wuhan 430074, Hubei, Peoples R China 4.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Cao, Bingdi,Wang, Ruilu,Zhang, Weijun,et al. Carbon-based materials reinforced waste activated sludge electro-dewatering for synchronous fuel treatment[J]. WATER RESEARCH,2019,149:533-542.
APA	Cao, Bingdi,Wang, Ruilu,Zhang, Weijun,Wu, Hanjun,&Wang, Dongsheng.(2019).Carbon-based materials reinforced waste activated sludge electro-dewatering for synchronous fuel treatment.WATER RESEARCH,149,533-542.
MLA	Cao, Bingdi,et al."Carbon-based materials reinforced waste activated sludge electro-dewatering for synchronous fuel treatment".WATER RESEARCH 149(2019):533-542.