Fermentation of undetoxified sugarcane bagasse hydrolyzates using a two stage hydrothermal and mechanical refining pretreatment. (August 2018)

• Record Type: Journal Article
• Authors: Wang, Zhaoqin; Dien, Bruce S.; Rausch, Kent D.; Tumbleson, M.E.; Singh, Vijay
• Is Part Of: Bioresource technology. Volume 261(2018)
• Page Start: 313
• Page End: 321
• Publication Date: 2018-08
• Subjects: Hot water pretreatment -- Disk milling -- Sugarcane bagasse -- Cofermentation -- Bioethanol; 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.2018.04.018
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Hot water pretreated sample were directly milled without No washing/detoxification step. Inhibitors became significant issue on cofermentation when hot water pretreatment temperature increased to 200 °C. Disk milling was effective on sugar and bioethanol yields increase. Synergistic effect of two stage pretreatment decreased as pretreatment severity increased. Abstract: In this study, liquid hot water pretreatment was combined with disk milling for pretreatment of sugarcane bagasse. Sugarcane bagasse was pretreated using liquid hot water (LHW) at 140–180 °C for 10 min (20% w/w solids content) and then disk milled. Disk milling improved glucose release 41–177% and ethanol production from glucose/xylose cofermentation by 80% compared to only using LHW pretreatment. The highest ethanol conversion efficiency achieved was 94%, which was observed when bagasse was treated at 180 °C with LHW and disk milled. However, a small amount of residual xylose (3 g/L) was indicative that further improvement could be achieved to increase ethanol production.