Skip to main content

Table 9 Main data for first generation ethanol production

From: Bioelectricity versus bioethanol from sugarcane bagasse: is it worth being flexible?

Input Value Unit
Sugarcane flow 500 tonne/h
Sugarcane TRS (Total Reducing Sugars) 15.86 % w/w
Cleaning section
Sugar losses 1.5 %
Cleaning efficiency 70 %
Water flow 1 kg/kg of sugarcane
Sugar extraction section
Sugarcane bagasse humidity 50 % w/w
Sugar recovery (first mill) 70 %
Sugar recovery (total) 96 %
Duty 16 kWh/tonne of fiber
Water flow 30 % w/w
Sugarcane juice treatment section
CaO flow 2 kg/tonne of juice
CaO concentration 10 % w/w
Heating final temperature 105 °C
Steam used 53698 kg/h
Water losses in flash 6495.5 kg/h
Polymer 3534 kg/h
Polymer concentration 0.05 % w/w
Sugar losses (decanter) 6.8 %
Sludge humidity 50 % w/w
Clarifier temperature (after decanter) 92 °C
Sugar losses (filter) 5.6 %
Filter cake humidity 70 % w/w
Water flow (filter) 116 %
Sugarcane juice concentration section
Evaporators area 8000 m2
Outlet sugar concentration 21.4 % w/w
Steam consumption 190584 kg/h
Steam produced 181657 kg/h
Pressure of steam produced 2.5 bar
Fermentation section
Fermentation yield 89 %
Yeast concentration (wine) 14 % w/w
Wine ethanol concentration 9 °GL
Yeast concentration (after separation) 70 % w/w
Ration of yeast rich stream / sugar solution 33 % w/w
Ethanol purification section
Specific steam consumption (1G) 2.7 kg/L of ethanol
Specific ethanol production (1G) 91.6 L/tonne of sugarcane
Specific vinasse + phlegm production (1G) 10.1 kg/L of ethanol