Table 2 The effect of sago starch concentration on ABE fermentation (without supplementation)
Starch concentration (g/L) | Final pH | Production (g/L) | Yield (g/g) | ||||
|---|---|---|---|---|---|---|---|
Acetone | Butanol | Ethanol | ABE | ABE | Butanol | ||
Sago starch 10 | 3.20 | 0.26 | 0.77 | 0.00 | 1.03 | 0.103 | 0.077 |
Sago starch 20 | 3.22 | 0.45 | 1.38 | 0.00 | 1.83 | 0.092 | 0.069 |
Sago starch 30 | 3.23 | 0.71 | 2.57 | 0.00 | 3.28 | 0.109 | 0.086 |
Soluble starch 30 | 3.29 | 0.76 | 2.49 | 0.00 | 3.25 | 0.108 | 0.083 |
Sago starch 40 | 3.39 | 0.80 | 2.36 | 0.00 | 3.16 | 0.079 | 0.059 |
Sago starch 50 | 3.35 | 1.03 | 3.16 | 0.00 | 4.19 | 0.084 | 0.063 |
Soluble starch 50 | 3.30 | 0.98 | 3.50 | 0.75 | 5.23 | 0.105 | 0.070 |
Sago starch 60 | 3.28 | 1.29 | 3.96 | 0.77 | 6.02 | 0.100 | 0.066 |
Sago starch 70 | 3.37 | 0.81 | 2.67 | 0.77 | 4.25 | 0.061 | 0.038 |