Effects of light wavelength and intensity on the production of ethanol by Saccharomyces cerevisiae in batch cultures

NCUIR > Engineering College > National Central University Department of Chemical & Materials Engineering > journal & Dissertation > Item 987654321/26382

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26382

Title:	Effects of light wavelength and intensity on the production of ethanol by Saccharomyces cerevisiae in batch cultures
Authors:	Shu,CH;Huang,CK;Tsai,CC
Contributors:	化學工程與材料工程學系
Keywords:	BLUE-LIGHT;NEUROSPORA-CRASSA;FUEL ETHANOL;FEEDSTOCKS;GROWTH;SUGAR
Date:	2009
Issue Date:	2010-06-29 17:26:48 (UTC+8)
Publisher:	中央大學
Abstract:	BACKGROUND: Photoreceptors have been identified in Saccharomyces cerevisae, however, the influence of light on the performance of ethanol fermentation of S. cerevisiae is not yet clear. The aims of this study are to elucidate the influence of light wavelength and intensity on the growth and ethanol production of S. cerevisiae and to describe a novel two-stage LED light process to optimize ethanol fermentation. RESULTS: Experimental results indicated that maximum biomass concentration X-max of the batch under red LED light increased monotonically with light intensity, and the optimal specific product yield Y-p/x was 13.2 g g(-1) at 600 lux. Maximum ethanol concentration P-max. of the batch under blue LED light increased monotonically with light intensity, and the optimal Y-p/x was 18.4 g g(-1) at 900 lux. A novel two-stage LED light process achieved maximum P-max, of 98.7 g dm(-3) resulting in 36% improvement compared with that of the batch in the dark. CONCLUSION: The light wavelength and its intensity significantly affected cell growth and ethanol formation of S. cerevisiae. Red LED light (630 nm) stimulated cell growth but slightly inhibited ethanol formation. In contrast, blue LED light (470 nm) significantly inhibited cell growth but stimulated ethanol formation. A novel two-stage LED light process has been successfully demonstrated to optimize ethanol fermentation of S. cerevisiae. (C) 2009 Society of Chemical Industry
Relation:	JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	886	View/Open

社群 sharing

Loading...