Development and application of co-culture for ethanol production by co-fermentation of glucose and xylose: a systematic review |
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Authors: | Yanli Chen |
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Institution: | (1) Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA |
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Abstract: | This article reviews current co-culture systems for fermenting mixtures of glucose and xylose to ethanol. Thirty-five co-culture
systems that ferment either synthetic glucose and xylose mixture or various biomass hydrolysates are examined. Strain combinations,
fermentation modes and conditions, and fermentation performance for these co-culture systems are compared and discussed. It
is noted that the combination of Pichia stipitis with Saccharomyces cerevisiae or its respiratory-deficient mutant is most commonly used. One of the best results for fermentation of glucose and xylose
mixture is achieved by using co-culture of immobilized Zymomonas mobilis and free cells of P. stipitis, giving volumetric ethanol production of 1.277 g/l/h and ethanol yield of 0.49–0.50 g/g. The review discloses that, as a
strategy for efficient conversion of glucose and xylose, co-culture fermentation for ethanol production from lignocellulosic
biomass can increase ethanol yield and production rate, shorten fermentation time, and reduce process costs, and it is a promising
technology although immature. |
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