Table 9.
Main data for first generation ethanol production
| 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 |