Effect of different pretreatments on delignification pattern and enzymatic hydrolysability of miscanthus, oil palm biomass and typha grass.
Cumulative pretreatments methods were evaluated for delignification ability and enzymatic digestibility using miscanthus (M×G), empty palm fruit bunch (EFB) and typha grass as feedstocks. Despite their close chemical composition, the three feedstocks unveiled quite different behavior under the same condition of pretreatment. Characterization of ethanol organosol lignins extracted from the three feedstocks by (13)C NMR and FTIR revealed information concerning S/G/H ratios which was important to rationalize the differences among the feedstock behavior. The S/G/H ratios for MxG, EFB and typha, were established to levels of ~52/44/4, ~68/30/2 and ~46/27/27 respectively. The xylans hydrolytic susceptibility were a major cause of difference in behavior of feedstock during the pretreatment process. The influence of the presence of naphthol during autohydrolysis on the delignification ability was studied. A good relationship was observed between S+H/G ratio and the scavenging effect of naphthol.
Asian Institute of Technology, 58 Moo 9, Km. 42, Paholyothin Highway, Klong Luang, Pathumthani 12120, Thailand.
Yakindra Prasad
YP
Timilsena
Chandana Janaka
CJ
Abeywickrama
Sudip Kumar
SK
Rakshit
Nicolas
N
Brosse
D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002480:Cellulase / Q000378:metabolism*; D000431:Ethanol / Q000494:pharmacology; D006868:Hydrolysis / Q000187:drug effects; D008031:Lignin / Q000737:chemistry / Q000302:isolation & purification*; D000073878:Palm Oil; D010938:Plant Oils / Q000378:metabolism*; D006109:Poaceae / Q000187:drug effects / Q000378:metabolism*; D012997:Solvents / Q000494:pharmacology; D017550:Spectroscopy, Fourier Transform Infrared; D032401:Typhaceae / Q000187:drug effects / Q000378:metabolism*; D001617:beta-Glucosidase / Q000378:metabolism*
D010938:Plant Oils; D012997:Solvents; D000431:Ethanol; D000073878:Palm Oil; D008031:Lignin; D001617:beta-Glucosidase; D002480:Cellulase