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Lipid Production for Biodiesel from Sludge and Crude Glycerol.

Zhang, Xiaolei, Chen, Jiaxin, Yan, Song, Tyagi, Rajeshwar Dayal, Surampalli, Rao Y. et Li, Ji (2017). Lipid Production for Biodiesel from Sludge and Crude Glycerol. Water Environment Research , vol. 89 , nº 5. p. 424-439. DOI: 10.2175/106143017X14839994523424.

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Résumé

Oleaginous yeast Trichosporon oleaginosus was studied for lipid production using municipal sludge with or without fortification of crude glycerol in a 15-L fermenter. The maximum lipid content (concentration) was 32.0% w/w (9.35 g/L), 33.6% (10.13 g/L), 33.3% (9.13 g/L), and 33.1% (9.03 g/L) w/w with the addition of 25, 50, 100, and 150 g/L glycerol, respectively. Glycerol concentration had little effect on lipid accumulation. However, glycerol concentration substantially affected increase of biomass concentration and cell count. The suitable glycerol concentration was approximately 40 g/L for Trichosporon oleaginosus growing in sludge medium with initial suspended solids (SS) concentration 30 g/L. Addition of nitrogen to sludge-glycerol medium enhanced lipid and biomass concentration. The energy conversion efficiency was 1.78, 1.55, and 1.71 with no nitrogen added, with addition of 1 g/L urea, and 3.7 g/L peptone, respectively. The biodiesel production cost was estimated nearly 0.75 US$/L.

Type de document: Article
Mots-clés libres: biodiesel production; crude glycerol; lipid accumulation; sludge
Centre: Centre Eau Terre Environnement
Date de dépôt: 18 oct. 2018 19:40
Dernière modification: 18 oct. 2018 19:40
URI: https://espace.inrs.ca/id/eprint/6473

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