Journal article
Pretreatment with lower feed moisture and lower extrusion temperatures aids in the increase in the fermentable sugar yields from fine-milled Douglas-fir
Bioresource technology, Vol.269, pp.262-268
12/2018
Handle:
https://hdl.handle.net/2376/101878
PMID: 30189379
Abstract
•Extrusion process imparted physical and structural changes to the wood particles.•Specific mechanical energy had a strong positive correction with sugar yield.•The lowest moisture content and temperature led to the highest sugar yield.•Recrystallization and agglomeration occurred after the extrusion process.
The impact of independent variables of extrusion on dependent variables of pre-milled Douglas-fir forest residuals was studied to enhance the enzymatic hydrolysis for production of fermentable sugar without catalysts. Co-rotating twin screw extruder was operated with three different feedstock moisture contents (30, 40, and 50%) at four different barrel temperatures (25, 50, 100, and 150 °C) as a pretreatment. The specific mechanical energy input ranged from 0.07 and 0.30 kWh/kg and had a very strong positive correlation with torque (r = 0.96, p < 0.01), glucose (r = 0.92, p < 0.01) and xylose/mannose yields with (r = 0.84, p < 0.01). Douglas-fir residuals extruded at lowest moisture content (30%) and temperature (25 °C) had the highest sugar yield, requiring the highest SME. Higher barrel temperature increased the median particle size and had lower glucose and xylose/mannose yields. Recrystallization and agglomeration were observed under higher temperature conditions.
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Details
- Title
- Pretreatment with lower feed moisture and lower extrusion temperatures aids in the increase in the fermentable sugar yields from fine-milled Douglas-fir
- Creators
- Bon-Jae Gu - School of Food Science, Washington State University, Pullman, WA 99164, USAMichael P Wolcott - Composite Materials and Engineering Center, Washington State University, Pullman, WA 99164, USAGirish M Ganjyal - School of Food Science, Washington State University, Pullman, WA 99164, USA
- Publication Details
- Bioresource technology, Vol.269, pp.262-268
- Academic Unit
- Office of Clean Technology; Food Science, School of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900546573101842
- Language
- English
- Resource Type
- Journal article