Department of Civil and Environmental Engineering, Hanyang University, Kyeonggi-Do, Korea.
Environ Technol. 2013 Jan-Feb;34(1-4):343-50. doi: 10.1080/09593330.2012.696716.
In this study, an automatic current controlling electrochemical-coagulation (EC) process was developed by testing laboratory-scale and pilot-scale reactors for removing copper (Cu) from printed circuit board (PCB) industrial wastewater with an economic use of energy. During tests of the laboratory-scale reactor, the influences of electrode material, electrode gap, current density, hydraulic retention time (HRT), wastewater pH and conductivity on removal performance were explored. The relational expression between conductivity and current density that optimizes Cu removal based on conductivity changes was established and applied to the optimal current EC process. During tests of the pilot-scale reactor, Cu removal from PCB industrial wastewater was investigated by applying an automatic current controlling system for the EC process. More than 90% of the Cu was removed when applying optimal current control for the EC process in both laboratory-scale and pilot-scale experiments, which demonstrated significant energy savings.
本研究通过实验室规模和中试规模的反应器测试，开发了一种自动电流控制电化学混凝（EC）工艺，以经济地利用能源去除印刷电路板（PCB）工业废水中的铜（Cu）。在实验室规模反应器的测试中，探讨了电极材料、电极间隙、电流密度、水力停留时间（HRT）、废水 pH 值和电导率对去除性能的影响。建立了基于电导率变化优化 Cu 去除的电导率与电流密度之间的关系式，并将其应用于最佳电流 EC 工艺中。在中试规模反应器的测试中，通过应用 EC 过程的自动电流控制系统，研究了从 PCB 工业废水中去除 Cu。在实验室规模和中试规模实验中，应用最佳电流控制 EC 工艺时，Cu 的去除率均超过 90%，这表明节能效果显著。
