Bioprocess development for biolubricant production using microbial oil derived via fermentation from confectionery industry waste

Papadaki, A., Vieira Fernandes, K., Chatzifragkou, A. ORCID: https://orcid.org/0000-0002-9255-7871, Gonçalves Aguieiras, E. C., Cavalcanti da Silva, J. A., Fernandez-Lafuente, R., Papanikolaou, S., Koutinas, A. and Guimarães Freire, D. M. (2018) Bioprocess development for biolubricant production using microbial oil derived via fermentation from confectionery industry waste. Bioresource Technology, 267. pp. 311-318. ISSN 0960-8524 doi: 10.1016/j.biortech.2018.07.016

Abstract/Summary

Microbial oil produced from confectionery and wheat milling side streams has been evaluated as novel feedstock for biolubricant production. Nutrient-rich fermentation media were produced by a two-step bioprocess involving crude enzyme production by solid state fermentation followed by enzymatic hydrolysis of confectionery industry waste. Among 5 yeast strains and 2 fungal strains cultivated on the crude hydrolysate, Rhodosporidium toruloides and Cryptococcus curvatus were selected for further evaluation for biolubricant production based on fermentation efficiency and fatty acid composition. The extracted microbial oils were enzymatically hydrolysed and the free fatty acids were esterified by Lipomod 34-MDP in a solvent-free system with trimethylolpropane (TMP) and neopentyl glycol (NPG). The highest conversion yields were 88% and 82.7% for NPG esters of R. toruloides and C. curvatus, respectively. This study also demonstrates that NPG esters produced from microbial oil have promising physicochemical properties for bio-based lubricant formulations that could substitute for conventional lubricants.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/78104
Identification Number/DOI	10.1016/j.biortech.2018.07.016
Refereed	Yes
Divisions	Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences > Food Research Group
Publisher	Elsevier
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