《Applied Water Science》杂志刊登“电解法去除二级处理污水中的浊度、化学需氧量及生化需氧量”

作者：Ashok Kumar Chopra, Arun Kumar Sharma

刊物：《Applied Water Science》，2013年3月，3卷，第1期，125－132页

关键词：电解过程；去除效率；电极组合；污水

摘要：本研究是通过使用不同金属电极组合，通30分钟12伏的直流电，电解经二级处理后的污水，以去除水中悬浮物（TD）、化学需氧量（COD）和生化需氧量（BOD）的过程。将电极不同的表面积（40，80，120和160平方厘米​​）作为反应器的横截面面积和电极间距离（2.5－10厘米）的效果的函数进行研究。研究结果表明，用铝（Al）和铁（Fe）的电极组合（Al-Fe或Fe-Al）处理污水的效果很好。用Al-Fe组合电极，TD（81.51％），COD（74.36％）和BOD（70.86％）的去除率可以达到最大，而Fe-Al电极组合TD,COD和BOD的去除率也可达到71.11%，64.95%和61.87％。与Fe-Al金属电极组合消耗的电能（2.50 kWh/m3）相比，Al-Fe电极组合消耗更低的电能（2.29 kWh/m3）。从经济效益上看，Al-Fe电极组合优于Fe-Al电极组合。这表明铝作消耗电极的效果要优于铁作消耗电极的效果，这大概是因为铝比铁有更好的絮凝能力。

Removal of turbidity, COD and BOD from secondarily treated sewage water by electrolytic treatment

Authors: Ashok Kumar Chopra, Arun Kumar Sharma

Journal: Applied Water Science, March 2013, Volume 3, Issue 1, pp 125-132

Key word: Electrolytic process; Removal efficiency; Electrode combinations; Sewage water

Abstract: A preliminary study was conducted for the removal of turbidity (TD), chemical oxygen demand (COD) and biochemical oxygen demand (BOD) from secondarily treated sewage (STS) water through the electrolytic batch mode experiments with DC power supply (12 V) up to 30 min and using a novel concept of electrode combinations of different metals. The different surface areas (40, 80, 120 and 160 cm2) of the electrodes as a function of cross-sectional area of the reactor and the effect of inter-electrode distances (2.5–10 cm) on the electrolysis of STS water were studied. This study revealed that the effluent can be effectively treated with the aluminum (Al) and iron (Fe) electrode combinations (Al–Fe and Fe–Al). The maximum removal of TD (81.51 %), COD (74.36 %) and BOD (70.86 %) was recorded with Al–Fe electrode system, while the removal of these parameters was found to be 71.11, 64.95 and 61.87 %, respectively, with Fe–Al electrode combination. The Al–Fe electrode combination had lower electrical energy consumption (2.29 kWh/m3) as compared to Fe–Al electrode combination (2.50 kWh/m3). The economic evaluation of electrodes showed that Al–Fe electrode combination was better than Fe–Al electrode combination. This revealed the superiority of aluminum as a sacrificial electrode over that of iron which can probably be attributed to better flocculation capabilities of aluminum than that of iron.

原文链接：http://link.springer.com/article/10.1007/s13201-012-0066-x