Department of Environmental Engineering, Anadolu University, Iki Eylul Campus, 26555 Eskisehir, Turkiye.
J Environ Manage. 2013 Jul 15;123:113-9. doi: 10.1016/j.jenvman.2013.03.016. Epub 2013 Apr 13.
This paper deals with the efficiency of electrocoagulation (EC) for the abatement of COD and absorbance (i.e. color) from real textile wastewater using a packed bed electrochemical reactor in a unique design, not previously encountered in the literature for the treatment of textile wastewater by electrocoagulation. The cylindrical iron reactor was used as a cathode while the packed bed formed from wrapped iron wire netting was used as an anode. Various operating parameters, such as current density, initial pH, wastewater recirculation flow rate and continuous flow regime, were examined for intensifying the performance of the process. Also, calculation of electrical energy consumption and the characterization of sludge formed during electrocoagulation have been performed. The initial COD concentration of 1953 mg/L was reduced to 61 mg/L with a removal efficiency of 96.88%, while the color of the wastewater was almost completely removed. The experimental results, throughout the present study, have indicate that electrocoagulation of textile wastewater using a uniquely designed reactor was very effective and direct dischargeable effluent, complying with legal requirements, was obtained. The XRD analysis of the sludge produced during EC reveals that maghemite (Fe2O3) is the main by-product formed after EC.
本文研究了在独特设计的填充床电化学反应器中用电凝聚（EC）去除实际纺织废水中 COD 和吸光度（即颜色）的效率，这种设计在用电凝聚处理纺织废水的文献中尚未出现。圆柱形铁反应器用作阴极，而由包裹的铁丝网形成的填充床用作阳极。为了强化处理过程的性能，考察了各种操作参数，如电流密度、初始 pH 值、废水循环流量和连续流动模式。此外，还计算了电凝聚过程中的电能消耗和污泥特性。初始 COD 浓度为 1953mg/L，去除效率达到 96.88%，降至 61mg/L，同时废水的颜色几乎完全去除。整个研究过程中的实验结果表明，使用独特设计的反应器进行纺织废水的电凝聚非常有效，可以获得符合法律要求的直接排放废水。EC 过程中产生的污泥的 XRD 分析表明，磁赤铁矿（Fe2O3）是 EC 后形成的主要副产物。
