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Mitigation of the inhibitory effect of soap by magnesium salt treatment of crude glycerol – A novel approach for enhanced biohydrogen production from the biodiesel industry waste.

Sarma, Saurabh Jyoti, Brar, Satinder Kaur, Le Bihan, Yann, Buelna, Gerardo et Soccol, Carlos Ricardo (2014). Mitigation of the inhibitory effect of soap by magnesium salt treatment of crude glycerol – A novel approach for enhanced biohydrogen production from the biodiesel industry waste. Bioresource Technology , vol. 151 . p. 49-53. DOI: 10.1016/j.biortech.2013.10.042.

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Résumé

Owing to its inhibitory effect on microbial growth, soap present in crude glycerol (CG) is a concern in biological valorization of the biodiesel manufacturing waste. By salting out strategy, up to 42% of the soap has been removed and the approach has beneficial effect on H₂ production; however, removal of more than 7% of the soap was found to be inhibitory. Actually, soap is utilized as a co-substrate and due to removal; the carbon–nitrogen ratio of the medium might have decreased to reduce the production. Alternatively, without changing the carbon–nitrogen ratio of CG, MgSO₄ treatment can convert the soap to its inactive form (scum). The approach was found to increase the H₂ production rate (33.82%), cumulative H₂ production (34.70%) as well as glycerol utilization (nearly 2.5-folds). Additionally, the treatment can increase the Mg (a nutrient) content of the medium from 0.57 ppm to 201.92 ppm.

Type de document: Article
Mots-clés libres: biodiesel; biohydrogen; crude glycerol; impurity; Soap
Centre: Centre Eau Terre Environnement
Date de dépôt: 11 avr. 2018 18:06
Dernière modification: 11 avr. 2018 18:06
URI: https://espace.inrs.ca/id/eprint/3679

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