Fermentation of undetoxified sugarcane bagasse hydrolyzates using a two stage hydrothermal and mechanical refining pretreatment

Zhaoqin Wang; Bruce S Dien; Kent D Rausch; M E Tumbleson; Vijay Singh

doi:10.1016/j.biortech.2018.04.018

Fermentation of undetoxified sugarcane bagasse hydrolyzates using a two stage hydrothermal and mechanical refining pretreatment

Bioresour Technol. 2018 Aug:261:313-321. doi: 10.1016/j.biortech.2018.04.018. Epub 2018 Apr 7.

Authors

Zhaoqin Wang¹, Bruce S Dien², Kent D Rausch¹, M E Tumbleson¹, Vijay Singh³

Affiliations

¹ Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
² National Center for Agricultural Utilization Research, US Department of Agriculture, Peoria, IL, USA.
³ Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA. Electronic address: vsingh@illinois.edu.

PMID: 29677659
DOI: 10.1016/j.biortech.2018.04.018

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.

Keywords: Bioethanol; Cofermentation; Disk milling; Hot water pretreatment; Sugarcane bagasse.

MeSH terms

Cellulose*
Ethanol
Fermentation*
Hydrolysis
Saccharum
Xylose

Substances

Ethanol
Cellulose
bagasse
Xylose