Dilute sulfuric acid cycle spray flow-through pretreatment of corn stover for enhancement of sugar recovery.
A cycle spray flow-through reactor was designed and used to pretreat corn stover in dilute sulfuric acid medium. The dilute sulfuric acid cycle spray flow-through (DCF) process enhanced xylose sugar yields and cellulose digestibility while increasing the removal of lignin. Within the DCF system, the xylose sugar yields of 90-93% could be achieved for corn stover pretreated with 2% (w/v) dilute sulfuric acid at 95 degrees C during the optimal reaction time (90 min). The remaining solid residue exhibited enzymatic digestibility of 90-95% with cellulase loading of 60 FPU/g glucan that was due to the effective lignin removal (70-75%) in this process. Compared with flow-through and compress-hot water pretreatment process, the DCF method produces a higher sugar concentration and higher xylose monomer yield. The novel DCF process provides a feasible approach for lignocellulosic material pretreatment.
Yan
Lishi
L
College of Life Science and Pharmacy, Nanjing University of Technology, Nanjing, PR China.
Zhang
Hongman
H
Chen
Jingwen
J
Lin
Zengxiang
Z
Jin
Qiang
Q
Jia
Honghua
H
Huang
He
H
D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002482:Cellulose / Q000737:chemistry; D013464:Sulfuric Acids / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014994:Xylose / Q000302:isolation & purification*; D003313:Zea mays / Q000737:chemistry*
D013464:Sulfuric Acids; D002482:Cellulose; D014994:Xylose; C033158:sulfuric acid