Production of β-carotene-enriched rice bran using solid-state fermentation of rhodotorula glutinis
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Publication Details
Author list: Roadjanakamolson M., Suntornsuk W.
Publisher: The Korean Society for Applied Microbiology
Publication year: 2010
Journal: Journal of Microbiology and Biotechnology (1017-7825)
Volume number: 20
Issue number: 3
Start page: 525
End page: 531
Number of pages: 7
ISSN: 1017-7825
Languages: English-Great Britain (EN-GB)
Abstract
This work was aimed at utilizing rice bran as a substrate for β-carotene production by Rhodotorula glutinis DM 28 under optimized conditions of solid-state fermentation. The biomass and β-carotene content of Rhodotorula glutinis DM 28 grown on rice bran as a sole substrate under solidstate fermentation were 54 g/kg rice bran and 1.65 mg/kg rice bran, respectively. Its biomass and β-carotene content, however, could be improved by 60% and 30%, respectively, using the Central Composite Design for the optimization of its cultivation conditions. The optimized conditions obtained were a pH of 5, a moisture content of 70% (w/w), and a carbon-to-nitrogen ratio of 4. Under these conditions, rice bran containing R. glutinis DM 28 had nutritional values of β-carotene, protein, and fat higher than those of rice bran alone. Yeast-grown rice bran could be suitable, therefore, to use as a β-carotene-enriched supplement in animal feeds.
Keywords
Animal feed