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RevistaBioresource Technology
Año2018
Volumen267
Páginas 311-318
Internacional

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

Autores:Roberto Fernandez-Lafuente
Grupos de investigación:Optimización de biocatalizadores y bioprocesos enzimáticos
Aikaterini Papadaki1,+, Keysson Vieira Fernandes2,+, Afroditi Chatzifragkou1, Erika Cristina
Gonçalves Aguieiras2, José André Cavalcanti da Silva3, Roberto Fernandez-Lafuente4,
Seraphim Papanikolaou1, Apostolis Koutinas1,*, Denise Maria Guimarães Freire2
1
 
1 Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera
Odos 75, 118 55, Athens, Greece.
2 Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro,
Cidade Universitária, Centro de Tecnologia, BL A, SL 549, Ilha do Fundão, 21949-900, Rio
de Janeiro, Brazil.
3 Cenpes, Centro de Pesquisas Leopoldo Américo Miguez de Mello, Petrobras, Rio de
Janeiro, Brazil.
4 Departamento de Biocatálisis. ICP-CSIC. C/ Marie Curie 2. Campus UAM-CSIC.
Cantoblanco. 28049 Madrid, Spain.
 
 
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.

Palabras clave:food industry side streams, microbial oil, bioprocess, biolubricants, enzymatic biocatalysis
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