Fortschritte in der angewandten Wissenschaftsforschung Offener Zugang

Abstrakt

Study of an electrocoagulation (EC) unit for the treatment of industrial effluent of Ouagadougou, Burkina Faso

Inoussa ZONGO, Belkacem MERZOUK, Kalifa PALM, Joseph WETHE, Amadou HAMA MAIGA, Jean-Pierre LECLERC, François LAPICQUE

The assessment of industrial liquid waste of Ouagadougou shows 91262 m3 yr-1 total quantity of effluent composed mainly of tannery effluent. Treatment experiment by EC of these effluents allowed to eliminate chromium and to lower COD up to 86% abatement. The process designed for the treatment of liquid waste from tannery works at 10.5 m3 hr-1 for current density of 67.5 A.m-2, 62.5 V, 1.2 kWh m-3 energy consumption, and produces 86,000 m3 of clear water with 200 mg L-1 COD, 0 turbidity, 91% color abatement, 0 ppm chromium. The treatment produces nearly 480 m3 yr-1 of sludge after compression using filter-press and 216 T of dry matter containing chromium and iron hydroxides, organic and inorganic pollutants.