Using low temperature to balance enzymatic saccharification and furan formation during SPORL pretreatment of Douglas-fir

	Using low temperature to balance enzymatic saccharification and furan formation during SPORL pretreatment of Douglas-fir
	Zhang, C.1,2; Houtman, C. J.2; Zhu, J. Y.2
刊名	process biochemistry
	2014-03-01
卷号	49 期号:3 页码:466-473
关键词	Low temperature pretreatment Enzymatic hydrolysis/saccharification Sugar degradation/inhibitor formation Kinetics Combined severity/hydrolysis factor Woody biomass
英文摘要	comparing analytical results for sulfite pretreatment to overcome the recalcitrance of lignocelluloses (sporl) of douglas-fir (pseudotsuga menziesii) at two different temperatures shows that the apparent activation energy of sugar degradation is higher than that of hemicellulose hydrolysis, approximately 161 kj/mole versus 100 kj/mole. thus, one can balance the production of degradation products against hemicellulose hydrolysis and therefore the enzymatic saccharification efficiency of the resultant substrate by changing pretreatment temperature and duration. specifically, pretreatment at 165 degrees c for 75 min significantly reduced furan formation compared with the pretreatment at 180 degrees c for 30 min while maintaining the same pretreatment severity and therefore the same substrate enzymatic digestibility (sed). obtaining high sed with douglas-fir is also limited by lignin content. fortunately, the bisulfite in sporl provides delignification activity. by combining kinetic models for hemicelluloses hydrolysis, sugar degradation, and delignification, the performance of pretreatment can be optimized with respect to temperature, duration, acid, and bisulfite loading. the kinetic approach taken in this study is effective to design viable low temperature pretreatment processes for effective bioconversion of lignocelluloses. published by elsevier ltd.
WOS标题词	science & technology ; life sciences & biomedicine ; technology
类目[WOS]	biochemistry & molecular biology ; biotechnology & applied microbiology ; engineering, chemical
研究领域[WOS]	biochemistry & molecular biology ; biotechnology & applied microbiology ; engineering
关键词[WOS]	cellulosic ethanol-production ; dilute-acid hydrolysis ; lodgepole pine ; overcome recalcitrance ; sulfite pretreatment ; severity parameter ; energy efficiency ; bioconversion ; fermentation ; biomass
收录类别	SCI
语种	英语
WOS记录号	WOS:000334482300016
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/145881]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian, Peoples R China 2.US Forest Serv, USDA, Forest Prod Lab, Madison, WI 53705 USA
推荐引用方式 GB/T 7714	Zhang, C.,Houtman, C. J.,Zhu, J. Y.. Using low temperature to balance enzymatic saccharification and furan formation during SPORL pretreatment of Douglas-fir[J]. process biochemistry,2014,49(3):466-473.
APA	Zhang, C.,Houtman, C. J.,&Zhu, J. Y..(2014).Using low temperature to balance enzymatic saccharification and furan formation during SPORL pretreatment of Douglas-fir.process biochemistry,49(3),466-473.
MLA	Zhang, C.,et al."Using low temperature to balance enzymatic saccharification and furan formation during SPORL pretreatment of Douglas-fir".process biochemistry 49.3(2014):466-473.