School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China.
School of Environmental and Safety Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China.
J Environ Sci (China). 2021 Mar;101:339-350. doi: 10.1016/j.jes.2020.09.001. Epub 2020 Sep 11.
The increase of electrical resistance (ER) and energy consumption (EC) during the later stage of dewatering is a major problem hindering the development of electro-dewatering (EDW) technology. As the variations of sludge characteristics are significant during the EDW process, the relationships between sludge characteristics and ER and EC during EDW remain unclear. In this study, the effects of moisture content (MC), thickness, pH, conductivity, zeta potential, temperature, and gas volume on the ER and EC during the EDW process were statistically investigated using correlation and multiple linear regression analyses. Herein, the results showed that the ER of the sludge near the anode was primarily affected by pH, whereas the sludge near the cathode was primarily affected by the MC and conductivity. Further, sludge temperature and conductivity were the most reliable indicators to predict the EC near the anode and cathode, respectively. The results of this study provide theoretical guidance useful for solving the increase of ER and EC during the later stage of the EDW process.
在脱水后期，电阻（ER）和能耗（EC）的增加是阻碍电脱水（EDW）技术发展的主要问题。由于 EDW 过程中污泥特性的变化很大，因此 EDW 过程中污泥特性与 ER 和 EC 之间的关系尚不清楚。在这项研究中，使用相关性和多元线性回归分析统计研究了水分含量（MC）、厚度、pH 值、电导率、zeta 电位、温度和气体体积对 EDW 过程中 ER 和 EC 的影响。结果表明，阳极附近污泥的 ER 主要受 pH 值影响，而阴极附近污泥主要受 MC 和电导率影响。此外，污泥温度和电导率是预测阳极和阴极附近 EC 的最可靠指标。本研究的结果为解决 EDW 后期 ER 和 EC 增加的问题提供了理论指导。
