Improvement of enzymatic saccharification of Populus and switchgrass by combined pretreatment with steam and wet disk milling

Akio Kumagai, Long Wu, Shinichiro Iwamoto, Seung-Hwan Lee, Takashi Endo, Miguel Rodriguez and Jonathan R. Mielenz

Renewable Energy, 2015, vol. 76, issue C, 782-789

Abstract: To reduce the recalcitrance of lignocellulosic biomass for subsequent biological processing, we pretreated energy crop feedstocks with mild steam treatment (ST; 130 and 150 °C for 60 min) and wet disk milling (WDM). We tested two phylogenetically different, but typical energy crop feedstocks: Populus trichocarpa and switchgrass (Panicum virgatum). WDM after ST facilitated the fibrillation of both types of biomass, resulting in an increase of specific surface area, improved enzymatic saccharification yield, and decrease in cellulose crystallinity. After steam treatment at 150 °C followed by 17 cycles of WDM, enzymatic hydrolysis resulted in almost complete glucan to glucose conversion in both feedstocks.

Keywords: Hot-compressed water; Wet disk milling; Populus; Switchgrass; Biorefinery (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:76:y:2015:i:c:p:782-789

DOI: 10.1016/j.renene.2014.11.070

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