Treatment of the baker's yeast wastewater by electrocoagulation

被引:154
|
作者
Kobya, M. [1 ]
Delipinar, S. [1 ]
机构
[1] Gebze Inst Technol, Dept Environm Engn, TR-41400 Gebze, Turkey
关键词
Baker's yeast wastewater; electrocoagulation; COD removal; TOC removal; operating cost;
D O I
10.1016/j.jhazmat.2007.11.019
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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/m(2) 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 $/m(3) or $/kg COD were 1.54 and 0.82, 0.51 and 0.27, respectively. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:1133 / 1140
页数:8
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