"11775","7","archive","3170",,,"disk0/00/01/17/75","2021-03-31 09:19:40","2021-03-31 09:19:40","2021-03-31 09:19:40","article",,,"show",,,,"","","","","","","","","","",,,,"Joy","S P","","","","","","","Kumar","A A","","","","",,,,,"","",,,,,"","","Department of Biotechnology, Indian Institute of Technology Madras, Chennai","India","Variations in structure and saccharification efficiency of biomass of different sorghum varieties subjected to aqueous ammonia and glycerol pretreatments","pub","s1.4","CRPS2","","public",,,"Sorghum, Glycerol pretreatment, Ammonia pretreatment, Cellulose digestibility, Xylan removal, Extractives",,"The authors greatly acknowledge IIT Madras for the award of half time teaching assistantship to Shereena Joy.","Sorghum biomass is a potential feedstock for lignocellulosic bioethanol production. The selection of suitable
sorghum variety is essential to obtain high ethanol yield. In this paper we screened sorghum varieties belonging
to sweet sorghum, post rainy sorghum, and hybrid sorghum. These varieties were screened based on their
agronomic traits, amenability to pretreatment methods, and enzymatic digestibility. The sorghum biomass was
pretreated using glycerol (60 %) at 190 ̊C for 60 min and aqueous ammonia (15 %) at 120 ̊C for 60 min. The
digestibility of the pretreated biomass was determined using commercial cellulase (Cellic CTec2) at 10U/g
loading, and the structural changes in the pretreated biomass were analyzed by spectroscopy and scanning
electron microscopy. Sweet sorghum varieties showed significant variations in phenotypic traits such as fresh
stalk yield, dry fodder yield, and juice yield. The cellulose digestibility among the sorghum varieties after the
pretreatment also differed significantly. The cellulose digestibility levels of glycerol range from 64 % to 89 % and
ammonia pretreated sorghum from 63 % to 81 %. The total sugar yields varied from 227 mg/g to 356 mg/g and
209 mg/g to 313 mg/g for sorghum pretreated with ammonia and glycerol, respectively. Although the
delignification of sorghum varieties was higher (31%–65%) after ammonia pretreatment than glycerol pretreatment,
the cellulose digestibility was higher for the glycerol pretreated biomass. These results indicated that
effect of delignification on cellulose digestibility is trivial. This study explores factors affecting pretreatment and
cellulose digestibility of sorghum varieties for maximum sugar yield in the cellulosic ethanol process.","2020-11","published",,"Industrial Crops and Products (TSI)","159",,"Elsevier",,"1-12",,,,,,"doi:10.1016/j.indcrop.2020.113072",,,,,"TRUE",,"0926-6690",,,,,,"","https://doi.org/10.1016/j.indcrop.2020.113072","https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=10.1016%2Fj.indcrop.2020.113072&btnG=","",,"","",,,,,,"",,,,,,,"",,,,,"",,,,,"","",,,,,"","",,,,,
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"11775",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Kunappareddy","A","","",,,,,"Gaddameedi","A","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"11775",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Gaddameedi","A","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
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