A new magnesium bisulfite pretreatment (MBSP) development for bio-ethanol production from corn stover.
This study established a new more neutral magnesium bisulfate pretreatment (MBSP) using magnesium bisulfate as sulfonating agent for improving the enzymatic hydrolysis efficiency of corn stover. Using the MBSP with 5.21% magnesium bisulfate, 170°C and pH 5.2 for 60 min, about 90% of lignin and 80% of hemicellulose were removed from biomass and more than 90% cellulose conversion of substrate was achieved after 48 h hydrolysis. About 6.19 kg raw corn stover could produce 1 kg ethanol by Saccharomyces cerevisiae. Meanwhile, MBSP also could protect sugars from excessive degradation, prevent fermentation inhibition formation and directly convert the hemicelluloses into xylooligosaccharides as higher-value products. These results suggested that the MBSP method offers an alternative approach to the efficient conversion of nonwoody lignocellulosic biomass to ethanol and had broad space for development.
College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
Heng
H
Yu
College of Forestry, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
Jiwei
J
Ren
College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
Lei
L
Liu
College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
Zhaojuan
Z
Zheng
College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
Junjun
J
Zhu
Key Laboratory of Forest Genetics and Biotechnology of the Ministry of Education, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
Qiang
Q
Yong
College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China; Key Laboratory of Forest Genetics and Biotechnology of the Ministry of Education, Nanjing Forestry University, Nanjing 210037, People's Republic of China. Electronic address: hgouyj@njfu.edu.cn.
Jia
J
Ouyang
D056804:Biofuels; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D000431:Ethanol / Q000378:metabolism*; D006868:Hydrolysis; D008031:Lignin / Q000302:isolation & purification; D017616:Magnesium Compounds / Q000494:pharmacology*; D012441:Saccharomyces cerevisiae / Q000187:drug effects / Q000378:metabolism; D013447:Sulfites / Q000494:pharmacology*; D014865:Waste Disposal, Fluid; D014866:Waste Products; D003313:Zea mays / Q000737:chemistry* / Q000187:drug effects
D056804:Biofuels; D017616:Magnesium Compounds; D013447:Sulfites; D014866:Waste Products; C036909:lignocellulose; C077595:magnesium bisulfite; D000431:Ethanol; D008031:Lignin
Bio-ethanol production; Enzymatic hydrolysis; Magnesium bisulfite pretreatment; Nonwoody lignocelluloses