Kinetic study on the pretreatment and enzymatic saccharification of rice hull for the production of fermentable sugars.
The production of fermentable sugars from rice hull was studied by dilute acid pretreatment and enzymatic saccharification. Rice hull (15%, w/v) was pretreated by 1% (v/v) sulfuric acid at high temperature (120 approximately 160 degrees C) for 15, 30, 45, and 60 min, respectively. The maximum sugar concentration from rice hull in the prehydrolysate was obtained at 140 degrees C for 30 min, but the enzymatic saccharification yield from the corresponding pretreated rice hull is not high. To another aspect, the maximum enzymatic saccharification yield was achieved at 160 degrees C for 60 min, while the recovery of fermentable sugars was the poorest. To take account of fermentable sugars from pretreatment and enzymatic saccharification, the maximum yield of sugars was obtained only when rice hull was treated at 140 degrees C for 30 min. Under this condition, 72.5% (w/w) of all sugars generated from the raw material can be recovered. The kinetic study on the enzymatic saccharification of dilute acid pretreated rice hull was also performed in this work by a modified Michaelis-Menten model and a diffusion-limited model. After calculation by a linear and a non-linear regression analysis, both models showed good relation with the experimental results.
Wei
Gong-Yuan
GY
School of Life Science, Soochow University, Suzhou 215123, China. weigy@suda.edu.cn
Lee
You-Jung
YJ
Kim
Yi-Joon
YJ
Jin
Il-Hyuck
IH
Lee
Jai-Heon
JH
Chung
Chung-Han
CH
Lee
Jin-Woo
JW
D001709:Biotechnology / Q000379:methods*; D050260:Carbohydrate Metabolism / Q000187:drug effects; D002480:Cellulase / Q000378:metabolism*; D005285:Fermentation / Q000187:drug effects / Q000502:physiology*; D006868:Hydrolysis / Q000187:drug effects; D007700:Kinetics; D012275:Oryza / Q000187:drug effects / Q000378:metabolism*; D012044:Regression Analysis; D013464:Sulfuric Acids / Q000494:pharmacology; D013696:Temperature; D013818:Thermogravimetry; D013997:Time Factors; D014866:Waste Products / Q000032:analysis*
D013464:Sulfuric Acids; D014866:Waste Products; D002480:Cellulase; C033158:sulfuric acid