Table 2 Ethanol concentration (%) obtained at different concentration of H2SO4 used for hydrolysis and at different fermentation time
From: Bio-ethanol production from wet coffee processing waste in Ethiopia
Fermentation time (h) | 0.2 M H2SO4 | 0.4 M H2SO4 | 0.6 M H2SO4 | 0.8 M H2SO4 | 1 M H2SO4 | Distilled water |
|---|---|---|---|---|---|---|
Ethanol concentration (%) | ||||||
12 | 50 | 58.5 | 56.3 | 54.2 | 45.8 | 29.7 |
24 | 68.7 | 78.0 | 75.5 | 70.4 | 63.5 | 29.8 |
36 | 67.1 | 74.4 | 67.4 | 64.4 | 63.5 | 27.8 |
48 | 53.1 | 71.3 | 65.3 | 61.7 | ||