Kobya M, Delipinar S
Department of Environmental Engineering, Gebze Institute of Technology, 41400 Gebze, Turkey.
J Hazard Mater. 2008 Jun 15;154(1-3):1133-40. doi: 10.1016/j.jhazmat.2007.11.019. Epub 2007 Nov 17.
In the laboratory-scale experiments, treatment of baker's yeast production wastewater has been investigated by electrocoagulation (EC) using a batch reactor. Effects of the process variables such as pH, electrode material (Fe and Al), current density, and operating time are investigated in terms of removal efficiencies of chemical oxygen demand (COD), total organic carbon (TOC), turbidity, and operating cost, respectively. The maximum removal efficiencies of COD, TOC and turbidity under optimal operating conditions, i.e., pH 6.5 for Al electrode and pH 7 for Fe electrode, current density of 70 A/m2 and operating time of 50 min were 71, 53 and 90% for Al electrode and 69, 52 and 56% for Fe electrode, respectively. Al electrode gave 4.4 times higher removal efficiency of turbidity than Fe electrode due to interference from color of dissolved iron. The operating costs for Al and Fe electrodes in terms of $/m3 or $/kg COD were 1.54 and 0.82, 0.51 and 0.27, respectively.
在实验室规模的实验中,使用间歇式反应器通过电凝聚(EC)法对面包酵母生产废水的处理进行了研究。分别从化学需氧量(COD)、总有机碳(TOC)、浊度的去除效率以及运行成本方面,研究了诸如pH值、电极材料(铁和铝)、电流密度和运行时间等工艺变量的影响。在最佳运行条件下,即铝电极的pH值为6.5,铁电极的pH值为7,电流密度为70 A/m²,运行时间为50分钟时,铝电极对COD、TOC和浊度的最大去除效率分别为71%、53%和90%,铁电极分别为69%、52%和56%。由于溶解铁颜色的干扰,铝电极对浊度的去除效率比铁电极高4.4倍。铝电极和铁电极以$/m³或$/kg COD计的运行成本分别为1.54和0.82、0.51和0.27。