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Wu P, Shi Y, Wang Z, Xiong Z, Liu D, Gerson AR, Pi K. Effect of electric field strength on electro-dewatering efficiency for river sediments by horizontal electric field. Sci Total Environ 2019; 647:1333-1343. [PMID: 30180340 DOI: 10.1016/j.scitotenv.2018.07.464] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 07/31/2018] [Accepted: 07/31/2018] [Indexed: 06/08/2023]
Abstract
A series of electro-dewatering experiments were conducted to explore the effect of sediment cake thickness (1-5 cm) and electric field strength (2-50 V cm-1). The final dry solids content, energy consumption and dewatering productivity were modeled and the validity of the model was tested. It was demonstrated that the electric field strength determines final dry solids content and the power utilization is an exponential function of electric field strength. It was also found that a relatively low electric field strength (<10 V cm-1) significantly decreased energy consumption while maintaining an acceptable dry solids content. These findings are beneficial to practical applications of electro-dewatering.
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Affiliation(s)
- Pan Wu
- School of Resource and Environmental Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China
| | - Yafei Shi
- School of Resource and Environmental Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China
| | - Zheng Wang
- School of Resource and Environmental Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China
| | - Ziming Xiong
- School of Resource and Environmental Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China
| | - Defu Liu
- School of Resource and Environmental Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China; Hubei Key Laboratory of Ecological Restoration for River-Lakes and Algal Utilization, Wuhan, Hubei, 430068, China
| | - Andrea R Gerson
- Blue Minerals Consultancy, Wattle Grove, Tasmania, 7109, Australia
| | - Kewu Pi
- School of Resource and Environmental Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China; Hubei Key Laboratory of Ecological Restoration for River-Lakes and Algal Utilization, Wuhan, Hubei, 430068, China; Blue Minerals Consultancy, Wattle Grove, Tasmania, 7109, Australia.
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