Electrocoagulation of olive mill wastewaters to enhance biogas production
To assess the combination of electrocoagulation and anaerobic co-digestion of olive mill wastewaters (OMWW) with other substrates, such as chicken manure, in a continuous stirred tank reactor for biogas production.
Anaerobic digestion of OMWW treated by electrocoagulation allowed higher production of biogas, up to 0.74 l biogas g−1 COD introduced compared to untreated or diluted olive mill wastewaters (OMWW) (0.37 and 0.6 l biogas g−1 COD) respectively. Pretreated OMWW co-digested with chicken manure at different volumic ratios OMWW/manure in a continuous stirred tank reactor under mesophilic conditions revealed that OMWW/manure (7:3 v/v) was optimal for biogas production and process stability.
Anaerobic digestion could achieve promising results in depollution and valorization of OMWW under a continuous stirred tank reactor.
KeywordsAnaerobic digestion Biogas Chicken manure Electrocoagulation Olive mill wastewaters
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