Valorization of bamboo by γ-valerolactone/acid/water to produce digestible cellulose, degraded sugars and lignin.
A novel pretreatment process was developed to achieve valorization of bamboo components into digestible cellulose, degraded sugars and lignin. In this case, bamboo was pretreated with 60% γ-valerolactone (GVL)/40% water containing 0.05mol/L H2SO4, yielding solid fraction rich in cellulose. The resulting liquor was further treated with the addition of NaCl and ultrasound, resulting in water phase rich in degraded sugars and GVL phase containing lignin, which was easy to recover. Results showed that the enzymatic hydrolysis was enhanced by 6.7-fold after treatment as compared to the control. The degraded sugars released in water phase contained monosaccharides (70.72-160.47g/kg) together with oligo- and polysaccharides (46.4-181.85g/kg). The lignin obtained had high purity, low molecular weight (1820-2970gmol-1) and low polydispersity (1.93-1.98). The present study creates a novel pretreatment process for the conversion of Gramineae biomass into useful feedstocks with potential applications in the fields of fuels, chemicals and polymers.
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Shu-Xian
SX
Li
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China. Electronic address: limingfei@bjfu.edu.cn.
Ming-Fei
MF
Li
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Ping
P
Yu
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Yong-Ming
YM
Fan
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Jia-Nan
JN
Shou
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Run-Cang
RC
Sun
D018533:Biomass; D050260:Carbohydrate Metabolism; D002482:Cellulose / Q000096:biosynthesis*; D005591:Chemical Fractionation; D005947:Glucose / Q000378:metabolism; D006868:Hydrolysis; D007783:Lactones / Q000378:metabolism*; D008031:Lignin / Q000096:biosynthesis*; D006109:Poaceae / Q000378:metabolism*; D013464:Sulfuric Acids / Q000378:metabolism*; D014867:Water / Q000378:metabolism*
D007783:Lactones; D013464:Sulfuric Acids; D014867:Water; D002482:Cellulose; D008031:Lignin; D005947:Glucose; C033158:sulfuric acid; C037556:gamma-valerolactone
Cellulose; Degraded sugars; Fractionation; Lignin; γ-Valerolactone