Journal
BIORESOURCE TECHNOLOGY
Volume 245, Issue -, Pages 351-357Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.08.058
Keywords
Supercritical water hydrolysis; Pilot-scale system; Sugar production; Bioethanol; Woody biomass
Funding
- Research Program of the National Institute of Forest Science (NIFoS) (Seoul, Republic of Korea) [FP0700-2016- 01]
- National Institute of Forest Science (NIFOS), Republic of South Korea [FP0700-2016-01-2017, FP0700-2016-01] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The aim of this study were to efficiently produce fermentable sugars by continuous type supercritical water hydrolysis (SCWH) of Quercus mongolica at the pilot scale with varying acid catalyst loading and to use the obtained sugars for ethanol production. The SCWH of biomass was achieved in under one second (380 degrees C, 230 bar) using 0.01-0.1% H2SO4. With 0.05% H2SO4, 49.8% of sugars, including glucose (16.5% based on biomass) and xylose monomers (10.8%), were liberated from biomass. The hydrolysates were fermented with S. cerevisiae DXSP and D452-2 to estimate ethanol production. To prepare the fermentation medium, the hydrolysates were detoxified using activated charcoal and then concentrated. The ethanol yield of fermentation with S. cerevisiae DXSP was 14.1% (based on biomass). The proposed system has potential for improvement in yield through process optimization. After further development, it is expected to be a competitive alternative to traditional systems for ethanol production from woody biomass.
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