School of Chemical and Biomolecular Engineering, University of Sydney, Building J01, Sydney NSW 2006, Australia.
Water Sci Technol. 2010;61(12):3221-7. doi: 10.2166/wst.2010.086.
The impact of electrode corrosion behaviour, reactor geometry and current density on electrocoagulation efficiency were investigated for the treatment of molasses process wastewater. Two laboratory-scale vertical plate electrocoagulation reactors were used for this investigation: the first being a low aspect ratio bath reactor with a low specific electrode area, while the other was a high aspect ratio column reactor with a high specific electrode area. Anomalous anodic dissolution and cathodic corrosion of the aluminium electrodes both contributed significantly to overall metal consumption. Increasing specific electrode area and aspect ratio each led to improved treatment efficiency, whereas the impact of current density was more complicated involving the combined influences of several competing effects. The space-time yields of coagulant and bubbles (both functions of specific electrode area, current density and current efficiency) were found to influence mixing within the reactor and thus treatment efficiency.
研究了电极腐蚀行为、反应器几何形状和电流密度对电絮凝处理糖蜜废水效率的影响。为此调查使用了两个实验室规模的垂直板式电絮凝反应器：第一个是具有低比表面积的低长宽比浴式反应器，而另一个是具有高比表面积的高长宽比柱式反应器。铝电极的异常阳极溶解和阴极腐蚀都对整体金属消耗有很大影响。增加比表面积和长宽比都能提高处理效率，而电流密度的影响则更为复杂，涉及到几种竞争效应的综合影响。发现混凝剂和气泡的时空产率（均为比表面积、电流密度和电流效率的函数）会影响反应器内的混合，从而影响处理效率。
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