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Anis Askari,Milad Taherkhani,Farzaneh Vahabzadeh 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.8
A single chamber microbial electrolysis cell (MEC) was constructed to treat olive oil mill wastewater(OOMW) biologically and produce hydrogen simultaneously. To characterize the optimal MEC condition, the MECwas fed with synthetic wastewater (SW) having a phenol concentration of 250mg l1. Therefore, the influence of differentapplied voltages and cathode materials was explored and the optimum condition for MEC was determined, whichwas when the stainless steel cathode was implemented and the external voltage of 0.6 V was supplied. Chemical oxygendemand (COD) removal of 62% and current density of 362 mA m2 were obtained for OOMW treatment, whileCOD removal of 73% and the current density of 274.4mA m2 were attained for SW treatment in this MEC at 0.6 V. Hydrogen production rate was 0.045m3 H2 m3d1 for SW and 0.053m3 H2 m3d1 for OOMW. Furthermore, the coulombicefficiency and cathodic hydrogen recovery were 23% and 81%, respectively. Finally, MEC performance in termsof electrical current generation, wastewater treatment and hydrogen production was compared to some similar reportedstudies.