Department of Chemical Engineering, National Institute of Technology Raipur, Raipur 492001, India.
Environ Technol. 2014 Jan-Feb;35(1-4):242-9. doi: 10.1080/09593330.2013.824507.
The electrochemical (EC) treatment of rice grain-based distillery wastewater was carried out in a 1.5 dm3 electrolytic batch reactor using aluminium plate electrodes. With the four-plate configurations, a current density (j) of 89.3 A/m2 and pH 8 was found to be optimal, obtaining a maximum chemical oxygen demand (COD) and colour removal of 93% and 87%, respectively. The chemical dissolution of aluminium was strongly influenced by initial pH (pHi). At higher pHi (pH 9.5) anode consumption decreased while energy consumption increased. At the optimal current density 89.3 A/m2, the aluminium electrode consumption was 16.855 g/dm3 wastewater and energy consumption was 31.4 Wh/dm3 achieving a maximum COD removal of 87%. The settling and filterability characteristics ofelectrochemically treated sludge were also analysed at different pH. It was noted that treated slurry at pHi 9.5 gave best settling characteristic, which decreased with increase in pH. EC-treated effluent at pHi 8 had provided best filterability. Characteristics of scum and residues are also analysed at different pH.
采用铝板电极，在 1.5 dm3 电解分批式反应器中对基于大米谷物的酿酒厂废水进行电化学（EC）处理。采用四板配置，发现电流密度（j）为 89.3 A/m2 和 pH 8 为最佳条件，可分别获得最大化学需氧量（COD）和色度去除率为 93%和 87%。铝的化学溶解受初始 pH 值（pHi）的强烈影响。在较高的 pHi（pH 9.5）下，阳极消耗减少，而能耗增加。在最佳电流密度 89.3 A/m2 下，铝电极的消耗为 16.855 g/dm3 废水，能耗为 31.4 Wh/dm3，可实现最大 COD 去除率为 87%。还分析了不同 pH 值下电化学处理污泥的沉降和过滤特性。注意到在 pHi 9.5 下处理后的泥浆具有最佳的沉降特性，随着 pH 值的增加而降低。在 pHi 8 下的 EC 处理后的废水具有最佳的过滤性能。还分析了不同 pH 值下浮渣和残渣的特性。
