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. 2018 Feb;40(2):297-301.
doi: 10.1007/s10529-017-2464-5. Epub 2017 Nov 9.

Electrocoagulation of olive mill wastewaters to enhance biogas production

Fatiha Sounni  1 , Halah Aissam  2 , Oumaima Ghomari  2 , Mohammed Merzouki  2 , Mohammed Benlemlih  2
Affiliations

Electrocoagulation of olive mill wastewaters to enhance biogas production

Fatiha Sounni et al. Biotechnol Lett. 2018 Feb.

Abstract

Objectives: 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.

Results: 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.

Conclusion: Anaerobic digestion could achieve promising results in depollution and valorization of OMWW under a continuous stirred tank reactor.

Keywords: Anaerobic digestion; Biogas; Chicken manure; Electrocoagulation; Olive mill wastewaters.

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