DOI: 10.1016/j.watres.2018.10.082
Scopus记录号: 2-s2.0-85057218505
论文题名: Carbon-based materials reinforced waste activated sludge electro-dewatering for synchronous fuel treatment
作者: Cao B. ; Wang R. ; Zhang W. ; Wu H. ; Wang D.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 533
结束页码: 542
语种: 英语
英文关键词: Carbon based materials (CBMs)
; Electro-osmosis dewatering
; Electrochemical reactions
; Extracellular polymeric substances (EPS)
; Sludge dewatering
Scopus关键词: Activated carbon
; Activated carbon treatment
; Biopolymers
; Electric conductivity
; Electroosmosis
; Electrophoretic mobility
; Energy utilization
; Graphite
; Sludge disposal
; Sustainable development
; Waste incineration
; Waste treatment
; Carbon based materials
; Dewatered sludge cake
; Electrical conductivity
; Electrochemical reactions
; Extracellular polymeric substances
; Sludge dewatering
; Sludge treatment and disposals
; Waste activated sludges
; Dewatering
; activated carbon
; fuel
; graphite
; activated carbon
; activated sludge
; chemical reaction
; dewatering
; dissolution
; electrical conductivity
; electrical method
; electrokinesis
; environmental issue
; exopolymer
; waste disposal
; waste technology
; waste treatment
; activated sludge
; Article
; dielectric constant
; electric conductivity
; electric current
; electrochemical analysis
; electrophoretic mobility
; energy consumption
; fluorescence excitation emission matrix spectroscopy
; impedance spectroscopy
; particle size
; priority journal
; sludge dewatering
; solubilization
; spectroscopy
; thermal analysis
; total organic carbon
; waste activated sludge
; zeta potential
; China
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 electrochemical 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. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122130
Appears in Collections: 气候变化事实与影响
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作者单位: University of Chinese Academy of Science, Beijing, 100085, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; School of Environmental Studies, China University of Geosciences, Wuhan, Hubei 430074, China; School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan, Hubei 430074, China
Recommended Citation:
Cao B.,Wang R.,Zhang W.,et al. Carbon-based materials reinforced waste activated sludge electro-dewatering for synchronous fuel treatment[J]. Water Research,2019-01-01