BioChem - DOS

pH pre-corrected liquid hot water pretreatment on corn stover with high hemicellulose recovery and low inhibitors formation

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Li, H.Q.; Jiang, W.; Jia, J.X.; Xu, J.

A challenge for lignocellulosic pretreatment is how to retain hemicellulose as much as possible. To reduce the degradation of hemicellulose and increase the recovery of sugars, an effective pH pre-corrected liquid hot water pretreatment (LHWP) was developed by employing a small amount of NaOH (≤5/100g substrate) to accelerate the hemicellulose deacetylation and simultaneously pre-correct the acid hydrolyzate in situ. The results showed that the pH pre-correction can control the hydrolyzate pH. Under the pretreatment severity (PS) of 4.0, the pH pre-corrected LHWP reduced the hemicellulose degradation by 35.3-92.3%, decreased furfural formation by 90.5-99.8%. The highest hemicellulose recovery of 96.38% was obtained with pH pre-corrected by 2g NaOH/100g substrate. Enzymatic hydrolysis (EH) and simultaneous saccharification and fermentation (SSF) on the whole slurry from the pH pre-corrected LHWP showed that the hemicellulose retained in the solid residue did not bring significant resistance to cellulose EH (p=0.837).

2014

Elsevier Applied Science

0960-8524

153

pp.292-299

10.1016/j.biortech.2013.11.089

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART68411101

pH pre-corrected liquid hot water pretreatment; Hemicellulose; Oligosaccharide; Furfural; Acetyl group