Composition of sugar cane,energy cane,and sweet sorghum suitable for ethanol production at Louisiana sugar mills |
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Authors: | Misook Kim Donal F Day |
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Institution: | (1) Audubon Sugar Institute, Louisiana State University Agricultural Center, 3845 Highway 75, St. Gabriel, LA 70776, USA |
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Abstract: | A challenge facing the biofuel industry is to develop an economically viable and sustainable biorefinery. The existing potential
biorefineries in Louisiana, raw sugar mills, operate only 3 months of the year. For year-round operation, they must adopt
other feedstocks, besides sugar cane, as supplemental feedstocks. Energy cane and sweet sorghum have different harvest times,
but can be processed for bio-ethanol using the same equipment. Juice of energy cane contains 9.8% fermentable sugars and that
of sweet sorghum, 11.8%. Chemical composition of sugar cane bagasse was determined to be 42% cellulose, 25% hemicellulose,
and 20% lignin, and that of energy cane was 43% cellulose, 24% hemicellulose, and 22% lignin. Sweet sorghum was 45% cellulose,
27% hemicellulose, and 21% lignin. Theoretical ethanol yields would be 3,609 kg per ha from sugar cane, 12,938 kg per ha from
energy cane, and 5,804 kg per ha from sweet sorghum. |
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