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Enhancing the value of nitrogen from rapeseed meal for microbial oil production

Paper ID Volume ID Publish Year Pages File Format Full-Text
17146 42646 2012 6 PDF Available
Title
Enhancing the value of nitrogen from rapeseed meal for microbial oil production
Abstract

Rapeseed meal, a major byproduct of biodiesel production, has been used as a low-cost raw material for the production of a generic microbial feedstock through a consolidated bioconversion process. Various strategies were tested for the production of a novel fermentation medium, rich in free amino nitrogen (FAN): commercial enzymes (CEs) (2.7 mg g−1 dry meal), liquid state fungal pre-treatment (LSF) using Aspergillus oryzae (4.6 mg g−1), liquid state fungal pre-treatment followed by fungal autolysis (LSFA) (9.13 mg g−1), liquid state pre-treatment using fungal enzymatic broth (EB) (2.1 mg g−1), but the best strategy was a solid state fungal pre-treatment followed by fungal autolysis (34.5 mg g−1).The bioavailability of the nitrogen sources in the novel medium was confirmed in fed-batch bioreactor studies, in which 82.3 g dry cell L−1 of the oleaginous yeast Rhodosporidium toruloides Y4 was obtained with a lipid content of 48%. The dry cell weight obtained was higher than that obtained using conventional yeast extract, due to a higher total nitrogen content in the novel biomedium. The fatty acids obtained from the microbial oil were similar to those derived from rapeseed oil.

► Solid state fermentation and autolysis were used to obtain FAN from rapeseed meal. ► The novel fermentation medium was at least as good as conventional yeast extract. ► The fatty acid methyl esters (FAMEs) were similar to those derived from rapeseed.

Keywords
Rapeseed meal; Fermentation; Solid state fermentation; Free amino nitrogen; Rhodosporidium toruloides; Microbial oil
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 50, Issues 6–7, 10 May 2012, Pages 337–342
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us