Ethanol fermentation from non-detoxified lignocellulose hydrolysate by a multi-stress tolerant yeast Candida glycerinogenes mutant. (February 2019)

• Record Type: Journal Article
• Authors: Zhao, Meilin; Shi, Dingchang; Lu, Xinyao; Zong, Hong; Zhuge, Bin; Ji, Hao
• Is Part Of: Bioresource technology. Volume 273(2019)
• Page Start: 634
• Page End: 640
• Publication Date: 2019-02
• Subjects: Candida glycerinogenes -- Lignocellulose ethanol -- Inhibitors -- Tolerance -- Non-detoxified sugarcane bagasse hydrolysate; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.11.053
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Candida glycerinogenes UG21, a multistress-tolerant yeast was obtained. UG21 exhibited highly-efficient degradation ability to furfural. High levels of acetic acid and furfural had little impact on UG21 ethanol fermentation of UG21. 1.24 g/L/h of ethanol productivity from non-detoxified sugarcane bagasse was obtained. UG21 could be used as platform for lignocellulose ethanol production. Abstract: The aim of this work was to study ethanol fermentation properties of the robust mutant Candida glycerinogenes UG21 from non-detoxified lignocellulose hydrolysate. C. glycerinogenes UG21 with high tolerance to elevated temperature, acetic acid, and furfural was obtained and applied in lignocellulose-based ethanol production. C. glycerinogenes UG21 exhibited highly-efficient degradation ability to furfural. High levels of acetic acid and furfural inhibited cell growths and ethanol production of Saccharomyces cerevisiae ZWA46 and industrial Angel yeast but had a slight impact on biomass and ethanol titer of C. glycerinogenes UG21. Using non-detoxified sugarcane bagasse hydrolysate, C. glycerinogenes UG21 reached 1.24 g/L/h of ethanol productivity at 40 °C but ethanol production of S. cerevisiae ZWA46 and Angel yeast was inhibited. Further, C. glycerinogenes UG-21 exhibited 2.42-fold and 1.58-fold higher productivity than S. cerevisiae ZWA46 and Angel yeast under low-toxicity hydrolysate. Therefore, C. glycerinogenes UG-21 could be an excellent candidate for low-cost lignocelluloses ethanol production.