Using sulfite chemistry for robust bioconversion of Douglas-fir forest residue to bioethanol at high titer and lignosulfonate: A pilot-scale evaluation
메타 데이터
바이오화학분류
바이오플라스틱
플라스틱
바이오정밀화학
용매
화학제품
연료
화장품용 기능성소재
계면활성제⁄증점제
의료용 화학소재
식품첨가제
논문
Using sulfite chemistry for robust bioconversion of Douglas-fir forest residue to bioethanol at high titer and lignosulfonate: A pilot-scale evaluation
<P><B>Abstract</B></P> <P>This study demonstrated at the pilot-scale (50kg) use of Douglas-fir forest harvest residue, an underutilized forest biomass, for the production of high titer and high yield bioethanol using sulfite chemistry without solid–liquor separation and detoxification. Sulfite Pretreatment to Overcome the Recalcitrance of Lignocelluloses (SPORL) was directly applied to the ground forest harvest residue with no further mechanical size reduction, at a low temperature of 145°C and calcium bisulfite or total SO<SUB>2</SUB> loadings of only 6.5 or 6.6wt% on oven dry forest residue, respectively. The low temperature pretreatment facilitated high solids fermentation of the un-detoxified pretreated whole slurry. An ethanol yield of 282L/tonne, equivalent to 70% theoretical, with a titer of 42g/L was achieved. SPORL solubilized approximately 45% of the wood lignin as directly marketable lignosulfonate with properties equivalent to or better than a commercial lignosulfonate, important to improve the economics of biofuel production.</P> <P><B>Highlights</B></P> <P> <UL> <LI> High ethanol yield of 284L/tonne from forest residue at 42g/L by SPORL. </LI> <LI> Enzymatic hydrolysis and fermentation of non-detoxified pretreated whole slurry. </LI> <LI> Low cellulase loading of 30mL/kg forest residue. </LI> <LI> Lignosulfonate of equivalent properties of commercial product directly marketable. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>