Research Article
Bioconversion of Sugarcane Vinasse into High-Added Value Products and Energy
Table 4
Cost of chemicals for production of 1-ton biosurfactant employing conventional fermentation medium (BS-C) or fermentation medium with vinasse (BS-V).
| | Chemicals | Unit Cost | Consumption | Total Cost US $ | Consumption | Total Cost US $ | | BS-V | BS-C |
| | NaOH 50% (m/v) | 0.96 $/L | 2.94 ml | 0.00 | 0 | 0 | | 99.3% (m/m) | 0.38 $/kg | 1,760 kg | 668.80 | 1,760 | 668.80 | | Glycerol 99.5% (m/v) | 1.10 $/kg | 7,153 kg | 7,868.30 | 7,589 kg | 8,347.90 | | 98% (m/m) | 1.20 $/kg | 0 | 0.00 | 952 kg | 1,142.40 | | 98% (m/m) | 1.20 $/kg | 0 | 0.00 | 2,221 kg | 2,265.20 | | ·7 98% (m/m) | 0.10 $/kg | 0 | 0.00 | 63.5 kg | 6.35 | | HCl 32% (m/v) | 0.26 $/L | 11.5 L | 2.99 | 9.7 L | 2.52 |
| | Total | | | 8,540.09 | | 12,433.17 |
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BS-V: 2.72 g/L = 1 ton/368 m3 (vinasse supplemented with glycerol and – C/N 15); BS-C: 3.22 g/L = 1 ton/311 m3 (conventional medium – C/N 15).
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