Scenario 1 | Scenario 2 | Scenario 3 | |
---|---|---|---|
Resource usage | |||
Cassava root (kg dry basis) | 1.56 × 103 | 1.56 × 103 | 1.56 × 103 |
Fresh water (m3) | 16.7 | 15.1 | 15.1 |
Chemical (kg) | 0.26 | 0.26 | 0.66 |
Recycled water (m3) | 0 | 1.57 | 4.45 |
Biogas production (m3) | 0 | 59.3 | 357.7 |
Electricity from grid (kWh) | 197.8 | 176.6 | 0 |
Electricity from biogas (kWh) | 0 | 21.2 | 197.8 |
Fuel oil consumption (m3) | 4.52 × 10−2 | 1.57 × 10−2 | 0 |
Biogas for drying (m3) | 0.0 | 64.5 | 98.8 |
Waste generation | |||
Wastewater to final open lagoons (m3) | 19.2 | 14.7 | 17.6 |
COD of wastewater to final open lagoons (g m−3) | 12,200 | 715 | 715 |
Cassava pulp (kg dry basis) | 1.55 × 103 | 1.55 × 103 | 1.01 × 103 |
Peel (kg dry basis) | 50 | 50 | 50 |
Rhizome (kg dry basis) | 530 | 530 | 530 |
Sand/soil (kg dry basis) | 400 | 400 | 400 |
GHG emission | |||
Wastewater (kg CO2eq) | 398.7 | 15.7 | 15.7 |
Cassava pulp fermentation (kg CO2eq) | 0.71 | 0.71 | 0.47 |
Electricity consumption in biogas system (kg CO2eq) | 0 | 0.15 | 19.93 |
Electricity consumption in cassava starch production (kg CO2eq) | 115.2 | 106.4 | 33.3 |
Thermal consumption in biogas system (kg CO2eq) | 0 | 0 | 3.00 × 10−3 |
Thermal consumption in cassava starch production (kg CO2eq) | 121.4 | 89.6 | 74.9 |
Total (kg CO2eq) | 636.0 | 212.6 | 144.3 |
Land use (m2) | 5.92 × 105 | 4.72 × 105 | 1.89 × 105 |