BioChem - DOS

An integrated paradigm for cellulosic biorefineries: utilization of lignocellulosic biomass as self-sufficient feedstocks for fuel, food precursors and saccharolytic enzyme production

Energy & environmental science

Lau, Ming W.; Bals, Bryan D.; Chundawat, Shishir P. S.; Jin, Mingjie; Gunawan, Christa; Balan, Venkatesh; Jones, A. Daniel; Dale, Bruce E.

<P>Simultaneously achieving economic, environmental and social sustainability is a major challenge for the emerging renewable fuel industry. We approach this problem by demonstrating a cellulosic biorefinery paradigm which produces ethanol and food precursors using lignocellulosic biomass as the exclusive source for carbohydrates and minerals. Enzymatic hydrolysate from Ammonia Fiber Expansion (AFEX)-pretreated corn stover at 18% w/w solids loading was found to be nutrient-rich. This hydrolysate was fermented completely within 48 h in two stages to produce ethanol and native yeast cells. An in-house saccharolytic enzyme production using AFEX-pretreated corn stover as carbohydrate source greatly reduces the dependence on commercial enzymes. The inducer mixture is 2.5&ndash;7 times more potent than lactose, a common enzyme inducer. Economic analysis indicates that the proposed paradigm is substantially more cost-effective relative to the 2005 NREL model. This improvement is largely attributed to the native yeast cells co-production and the reduction of enzyme cost through the in-house production.</P><BR><BR><P>Graphic Abstract</P><P>Simultaneously achieving economic, environmental and social sustainability is a major challenge for the emerging renewable fuel industry.<BR><IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2ee03596k'><BR></P>

2012

The Royal Society of Chemistry

1754-5692

1754-5706

5

5

pp.7100-7110

10.1039/c2ee03596k

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART62265666