Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 21 ISSUE 3
Written by Atef M. ELSBAAY, Mayie M. AMER

The electrocoagulation energy consumption, specific electrocoagulation energy consumption removal efficiency of COD and removal efficiency of TSS from olive mill waste water were examined by using electrocoagulation cell. Iron and aluminium were used as a material of electrodes. The distance between electrodes were 1, 1.5, 2, 2.5 and 3 cm, the electrocoagulation time were 10, 20, 30 and 40 mint and retention time 30 mint. The electrocoagulation voltage was 20 V while the electrical current was changing from 0.8 to 4 A. The electrocoagulation energy consumption increasing with decreasing distance between electrodes and increasing electrocoagulation time for two types of electrodes. At 1cm distance between electrodes and 40 mint electrocoagulation time, electrocoagulation energy consuming was 17.8 kW.h.m^-3 for Al electrodes and 16.8 kW.h.m^-3 for Fe electrodes. There were substantial (p<0.05) variations in COD removal efficiency and electrode distance. The effectiveness of the elimination of COD was 26.3 and 27.3 % for Fe and Al electrodes at a gap of 1cm between electrodes and 40 mints electro-coagulation times. The specific energy consumption increases with increasing process time. For Al electrodes and distance between electrodes 1 cm, the specific electrical energy consumption were 0.64, 1.15, 1.46 and 1.57 kW.h.g^-1 COD at process time 10, 20, 30 and 40 mint respectively. The removal efficiency of TSS increasing with decreasing distance between electrodes and increasing electrocoagulation time for two types of electrodes. At 1cm distance between electrodes and 40 mint electrocoagulation time, the removal efficiency of TSS were 47.6 and 42.9 % for Al and Fe electrodes respectively.

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