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The pH-based fed-batch for lipid production from Trichosporon oleaginosus with crude glycerol.

Chen, Jiaxin; Zhang, Xiaolei; Drogui, Patrick; Tyagi, Rajeshwar Dayal (2018). The pH-based fed-batch for lipid production from Trichosporon oleaginosus with crude glycerol. Bioresource Technology , vol. 259 . p. 237-243. DOI: 10.1016/j.biortech.2018.03.045.

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Résumé

In this study, it was found that the optimal pH for the growth of Trichosporon oleaginosus was related to the fermentation medium. A neutral or weak acid pH condition was optimal for the growth of Trichosporon oleaginosus in the extract-peptone-dextrose and wastewater sludge medium. Significant inhibition was observed at neutral pH in the wastewater sludge + crude glycerol medium due to the high soap content of the crude glycerol. By converting the soap to free fatty acid (FFA) at pH 5, the soap inhibition could be prevented. Fed-batch fermentation was employed to produce lipid from Trichosporon oleaginosus at pH 5 controlled by feeding crude glycerol. A remarkably high biomass (65.63 g/L) and lipid (35.79 g/L) concentration were achieved from the pH-based fed-batch fermentation in this study.

Type de document: Article
Mots-clés libres: lipid production; suitable pH; crude glycerol; fed-batch fermentation
Centre: Centre Eau Terre Environnement
Date de dépôt: 08 mai 2018 16:02
Dernière modification: 08 mai 2018 16:02
URI: http://espace.inrs.ca/id/eprint/6916

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