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Growth of oleaginous Rhodotorula glutinis in an internal-loop airlift bioreactor by using lignocellulosic biomass hydrolysate as the carbon source

Paper ID Volume ID Publish Year Pages File Format Full-Text
20215 43163 2015 5 PDF Available
Title
Growth of oleaginous Rhodotorula glutinis in an internal-loop airlift bioreactor by using lignocellulosic biomass hydrolysate as the carbon source
Abstract

•LCB hydrolysate as a carbon source for the cultivation of oleaginous yeast.•Oleic acid (C18:1) and linoleic acid (C18:2) were the predominant fatty acids.•The airlift bioreactor at 2 vvm achieved the highest biomass growth.•This low cost feedstock has the potential of being adopted for the production of β-carotene.

The conversion of abundant lignocellulosic biomass (LCB) to valuable compounds has become a very attractive idea recently. This study successfully used LCB (rice straw) hydrolysate as a carbon source for the cultivation of oleaginous yeast-Rhodotorula glutinis in an airlift bioreactor. The lipid content of 34.3 ± 0.6% was obtained in an airlift batch with 60 g reducing sugars/L of LCB hydrolysate at a 2 vvm aeration rate. While using LCB hydrolysate as the carbon source, oleic acid (C18:1) and linoleic acid (C18:2) were the predominant fatty acids of the microbial lipids. Using LCB hydrolysate in the airlift bioreactor at 2 vvm achieved the highest cell mass growth as compared to the agitation tank. Despite the low lipid content of the batch using LCB hydrolysate, this low cost feedstock has the potential of being adopted for the production of β-carotene instead of lipid accumulation in the airlift bioreactor for the cultivation of R. glutinis.

Keywords
Hydrolysate; Rhodotorula; Oleaginous; Rice straw; Airlift bioreactor
First Page Preview
Growth of oleaginous Rhodotorula glutinis in an internal-loop airlift bioreactor by using lignocellulosic biomass hydrolysate as the carbon source
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 119, Issue 5, May 2015, Pages 580–584
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering