Abstract：
:A novel combined pretreatment process of poplar sawdust was established in this study based on the sequential acetic acid and alkali treatment with poly (ethylene glycol) diglycidyl ether (PEGDE). Effects of each treatment step on chemical composition, cellulose accessibility, and enzymatic digestibility of poplar sawdust was investigated. Acetic acid pretreatment remarkably increased cellulose accessibility while also producing a relatively high quantity of xylooligosaccharides (XOS) (37.6% of raw xylan). However, enzymatic digestibility remained low (28.3%) despite hemicellulose disruption. Post alkali treatment was next applied, leading to improvement on cellulose accessibility and enzymatic hydrolysis. Enzymatic hydrolysis was improved more significantly by successive alkali treatment with PEGDE. Its potential mechanisms attributable to enzymatic hydrolysis improvement were explored by revealing the changes to lignin properties. This work successfully demonstrated that recalcitrant waste woody biomass can be biorefined into both high-value XOS as well as relatively high yield of fermentable sugars.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Lai C,Jia Y,Wang J,Wang R,Zhang Q,Chen L,Shi H,Huang C,Li X,Yong Qdoi
10.1016/j.biortech.2019.121569subject
Has Abstractpub_date
2019-09-01 00:00:00pages
121569eissn
0960-8524issn
1873-2976pii
S0960-8524(19)30799-0journal_volume
288pub_type
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