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Potential for ethanol production from different sorghum cultivars

Journal Article · · Industrial Crops and Products
 [1];  [2];  [2];  [2];  [2];  [2];  [3];  [3];  [3]
  1. University of Florida, Perry, FL (United States); University of Jaen (Spain); University of Florida
  2. University of Florida, Perry, FL (United States)
  3. University of Florida, Gainesville, FL (United States)

This work presents the ethanol production results using three sweet sorghum cultivars. The sugar rich juice was fermented by Saccharomyces cerevisiae and Escherichia coli. The residual bagasse was further pretreated by dilute phosphoric acid steam explosion. The resulting slurry was submitted to Liquefaction plus Simultaneous Saccharification and co-Fermentation (L + SScF) process using Novozymes Cellic CTec3 enzymes and an engineered ethanologenic E. coli strain. Results show a sugar concentration in the juice ranging from 140 to 170 g/ L, which were almost completely converted into ethanol by yeast. Concerning the L + SScF, the final ethanol concentration produced increased with enzyme dosage, with little difference among all three sorghum cultivars, reaching up to 27.5 g EtOH/L at enzyme concentrations of 11.5 FPU/gDW. Here, considering the ethanol produced from juice and from Sweet Sorghum Bagasse (SSB), there is a potential of producing up to 10,600 L of ethanol per hectare, improving on the values reported for corn ethanol.

Research Organization:
University of Florida
Sponsoring Organization:
USDOE Office of International Affairs (IA); USDA-NIFA Biomass Research and Development Initiative Competitive; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Bioenergy Technologies Office; Florida Dept. of Agriculture and Consumer Services
Grant/Contract Number:
PI0000031
OSTI ID:
1770131
Alternate ID(s):
OSTI ID: 1538381
OSTI ID: 1495843
Journal Information:
Industrial Crops and Products, Journal Name: Industrial Crops and Products Vol. 109; ISSN 0926-6690
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Xylose–glucose co-fermentation to ethanol by Escherichia coli strain MS04 using single- and two-stage continuous cultures under micro-aerated conditions journal August 2019