TY - JOUR
T1 - Pretreatment of sugarcane postharvest leaves by γ-valerolactone/water/FeCl3 system for enhanced glucan and bioethanol production
AU - Palliprath, Suchithra
AU - Poolakkalody, Najya Jabeen
AU - Ramesh, Kaviraj
AU - Mangalan, Starlet Marath
AU - Kabekkodu, Shama Prasada
AU - Santiago, Rogelio
AU - Manisseri, Chithra
N1 - Funding Information:
Authors are thankful to Central University of Kerala, India, for providing necessary infrastructure to carryout experiments. Suchithra P is thankful to University Grants Commission (UGC), India for providing junior and senior research fellowships.
Funding Information:
Authors are thankful to Central University of Kerala, India, for providing necessary infrastructure to carryout experiments. Suchithra P is thankful to University Grants Commission (UGC), India for providing junior and senior research fellowships.
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/7
Y1 - 2023/7
N2 - The potential of sugarcane postharvest leaves for fermentable sugar yield and bioethanol production was analyzed using FeCl3 catalyzed γ-valerolactone/water pretreatment in the present study. Widely cultivated Indian cane variety Co 86032 (Nayana) was selected for the analysis. Cellulose (52.7 ± 5%), hemicellulose (33.9 ± 3.5%) and lignin (18 ± 0.3%) were estimated in postharvest leaves. Optimized GVL/water/FeCl3 pretreatment (70% GVL/300 mM FeCl3 in 30% water at 120 °C for 3 h) resulted in high delignification (74%) and hemicellulose dissolution (85.6%). Extensive removal of ester-linked ferulic acid (94.2%) and p-coumaric acid (84.4%) was also observed after pretreatment. The pretreatment-induced changes were visualized through FESEM, FTIR, XRD and confocal imaging. Only trace amounts of furfural and HMF were detected in the pretreated slurry. At 96 h of saccharification, 82.5% glucose was yielded. Fermentation of enzymatic hydrolyzate using S. cerevisiae MTCC-36 resulted in ethanol yield of 0.434 g/g glucose at 21 h. Current study revealed that, FeCl3 catalyzed GVL/water pretreatment causes effective deconstruction of cane leaves for bioethanol production.
AB - The potential of sugarcane postharvest leaves for fermentable sugar yield and bioethanol production was analyzed using FeCl3 catalyzed γ-valerolactone/water pretreatment in the present study. Widely cultivated Indian cane variety Co 86032 (Nayana) was selected for the analysis. Cellulose (52.7 ± 5%), hemicellulose (33.9 ± 3.5%) and lignin (18 ± 0.3%) were estimated in postharvest leaves. Optimized GVL/water/FeCl3 pretreatment (70% GVL/300 mM FeCl3 in 30% water at 120 °C for 3 h) resulted in high delignification (74%) and hemicellulose dissolution (85.6%). Extensive removal of ester-linked ferulic acid (94.2%) and p-coumaric acid (84.4%) was also observed after pretreatment. The pretreatment-induced changes were visualized through FESEM, FTIR, XRD and confocal imaging. Only trace amounts of furfural and HMF were detected in the pretreated slurry. At 96 h of saccharification, 82.5% glucose was yielded. Fermentation of enzymatic hydrolyzate using S. cerevisiae MTCC-36 resulted in ethanol yield of 0.434 g/g glucose at 21 h. Current study revealed that, FeCl3 catalyzed GVL/water pretreatment causes effective deconstruction of cane leaves for bioethanol production.
UR - https://www.scopus.com/pages/publications/85151011684
UR - https://www.scopus.com/pages/publications/85151011684#tab=citedBy
U2 - 10.1016/j.indcrop.2023.116571
DO - 10.1016/j.indcrop.2023.116571
M3 - Article
AN - SCOPUS:85151011684
SN - 0926-6690
VL - 197
JO - Industrial Crops and Products
JF - Industrial Crops and Products
M1 - 116571
ER -