Abstract
This article shows a laboratory parametric study carried out for optimizing the electro-dewatering (EOD) of agro-industrial sludge. The sludge dry matter reached 40% w/w after 3 hours of EOD with current density of 80 A/m2, against 20% w/w after 11 hours of mechanical compression. The electricity consumption was 0.27 kWh/kg of water removed. Another advantage of EOD lies on the depolluting effect observed. The chemical oxygen demand of sludge was decreased by 64% probably due to oxidization reactions at anode. 97% of sodium and 63% of iron contained in sludge were also transferred to the filtrate during the treatment.
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