School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, China.
Shanghai Techase Environment Protection Co., Ltd, 1121 North Zhongshan No. 2 Road, Shanghai, 200092, China; College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
Environ Res. 2020 Jan;180:108862. doi: 10.1016/j.envres.2019.108862. Epub 2019 Oct 28.
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.
本研究通过模型模拟和分层试验，考察了电脱水技术在高盐工业污泥脱水性能方面的影响，分析了离子的迁移和分布情况。电脱水过程中钠离子的迁移速度比钾离子快，钠离子的迁移模拟结果与分层实验结果一致。电迁移去除了超过 80%的钠离子，这对于后续污泥的利用是有益的。采用分段电压电脱水法，单位质量能耗从 350.08 kWh/吨污泥降低至 295.88 kWh/吨污泥。本研究深入探讨了电脱水过程中可溶性离子的迁移和分布机制，为提高高盐工业污泥电脱水的商业应用性能提供了一种方法。
