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Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
Optimization of energy costs in the pretreatment of olive mill wastewaters by electrocoagulation
Tamer Coskun1, Fatih Ilhan, Neslihan Manav Demir
1Yildiz Technical University Faculty of Civil Engineering, Environmental Engineering Department, Esenler, Istanbul, Turkey. tcoskun@yildiz.edu.tr
Abstract:
In this study, the electrocoagulation process was evaluated as a pretreatment process for olive mill wastewaters. Aluminium (Al) and iron (Fe) electrodes, several contact times and 0.5, 1 and 2 A currents were used to compare chemical oxygen demand (COD) removal efficiencies for each case. The optimum contact time and current were 45 minutes and 1 A, respectively, which resulted in a COD removal of 58.7% with an Al electrode. Experimental data from distinct operational conditions were used to fit a model for COD removal efficiencies. Energy consumption was also predicted. Under optimum operational conditions, the treatment cost was approximately Euro 0.13 kg(-1) CODremoved and Euro 4.41 m(-3). The results showed that the electrocoagulation process was a cost-effective method for the pretreatment of olive mill wastewaters.
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