Journal
ENVIRONMENTAL RESEARCH
Volume 180, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2019.108862
Keywords
Highly-salty sludge; Electro-dewatering; Ions migration and distribution; Model simulation
Funding
- Thousands Youth Talent Project
- Natural Science Foundation of China (NSFC) [51704122]
- Urban Sewage Sludge Safeguarding, Disposing and Recycling Full Chain Technology Improvement and Engineering Demonstration [2017ZX07403002]
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In this study, the effects of electro-dewatering technology applied to high-salt industrial sludge dewatering performance were investigated, in terms of ions migrations and distributions by model simulation and layered tests. The simulation results of Na-= and K+ migrations were consistent with layered experiments during electro-dewatering, where Na+ ions migrated faster than K+ ions. More than 80% Na+ ions were removed by electromigration, which would be useful in subsequent sludge utilization. The mass specific energy consumption was reduced from 350.08 to 295.88 kWh per ton sludge by means of piecewise voltage electro-dewatering method. This study provided insights into the soluble ions migration and distribution mechanism in electro-dewatering process, and a method to improve commercial application performance of high-salt industrial sludge electro-dewatering.
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