Institute of Urban and Industrial Water Management, Technische Universität Dresden, Germany.
Department of Chemical Engineering, Shiraz University, Iran.
J Environ Manage. 2023 Dec 1;347:119085. doi: 10.1016/j.jenvman.2023.119085. Epub 2023 Sep 25.
The performance of electrocoagulation-flotation (ECF) process can profoundly be affected by the reactor design and electrode configuration. These may, in turn, influence the removal efficiency, flow hydrodynamic, floc formation, and flotation/settling characteristics. The present work aimed at developing a new spiral electrode configuration to enhance the ECF process. To do so, the impacts of parameters such as energy consumption, removal efficiency of the contaminants from industrial wastewater with a composition of turbidity, emulsified oil, and heavy metals (Si, Zn, Pb, Ni, Cu, Cr, and Cd), as well as stirring speed and foaming have been investigated. Comparison was also made between the experimental results of the new electrode configuration with the conventional rectangular cell with plate electrode configuration with the same volume and electrode surface area. The findings revealed that energy consumption of the spiral electrode configuration within the operating times of 10, 20, 30, 32, 48, and 70 min, was approximately 20% lower compared to that of the conventional ECF. Moreover, the maximum and minimum removal efficiency of 97% and 60% were obtained for turbidity and TOC for the stirring speed of 500 rpm and Reynolds number of 10,035, respectively. Finally, the formed gas bubbles tilted toward the center due to the enhanced flow hydrodynamic which resulted in substantial reduction of foam formation.
电絮凝浮选（ECF）过程的性能会受到反应器设计和电极配置的深刻影响。这些因素反过来又会影响去除效率、流动水动力、絮体形成和浮选/沉降特性。本工作旨在开发一种新的螺旋电极配置来增强 ECF 过程。为此，研究了能量消耗、去除浊度、乳化油和重金属（Si、Zn、Pb、Ni、Cu、Cr 和 Cd）等污染物的去除效率、搅拌速度和泡沫等参数的影响。还将新电极配置的实验结果与具有相同体积和电极表面积的常规矩形槽板电极配置的实验结果进行了比较。结果表明，在 10、20、30、32、48 和 70 min 的运行时间内，螺旋电极配置的能量消耗比常规 ECF 低约 20%。此外，在搅拌速度为 500 rpm 和雷诺数为 10035 的情况下，浊度和 TOC 的最大去除效率分别为 97%和 60%。最后，由于增强的流动水动力，形成的气泡倾斜到中心，从而大大减少了泡沫的形成。
