Table 3 Annual production cost (US$) of the P(3HB) production plant for Scenario 1 and 2
Scenario 1 | Scenario 2 | |||||
|---|---|---|---|---|---|---|
Quantity | US$/unit | US$/year | Quantity | US$/unit | US$/year | |
Raw materials | ||||||
OFMSW | 357.0 t | − 77 | − 27,489 | |||
Ammonia | 264.5 t | 20 | 5290 | 264.5 t | 20 | 5,290 |
Anisole | 48.8 t | 2120 | 103,456 | 59.1 t | 2120 | 125,294 |
Celluclast | 16.1 t | 6270 | 100,947 | |||
Glucose | 65.6 t | 400 | 26,240 | 137.0 t | 400 | 54,800 |
NaOH for disinfection | 9,539,3 t | 10 | 95,393 | 9,000.1 t | 10 | 90,001 |
Pentopan BG | 9.3 t | 9200 | 85,560 | |||
Salts | 19.6 t | 800 | 13,280 | 23.6 t | 800 | 18,880 |
NaOH | 37.9 t | 300 | 11,370 | |||
Sulphuric acid | 46.3 t | 70 | 3241 | |||
Sub-total | 444,777 | 294,265 | ||||
Consumables | ||||||
2000-mL shake flask | 214 items | 1.8 | 385.2 | 214 items | 1.8 | 385.2 |
Filtration membrane | 8 m2 | 400 | 3319 | |||
Sub-total | 385.2 | 3704.2 | ||||
Quality control | ||||||
Sub-total | 19,605.0 | 26,995.0 | ||||
Utilities | ||||||
Electricity | 1,159,122 kW h−1 | 0.11 | 127,503.4 | 789,424.0 kW h−1 | 0.11 | 86,836.6 |
Steam | 8738.0 t | 12.00 | 104,856.0 | 4885.0 t | 12.00 | 58,620.0 |
Cooling water | 121,580.0 t | 0.05 | 6079.0 | 75,747.0 t | 0.05 | 3787.4 |
Glycol | 509,864.0 t | 0.35 | 178,452.4 | 132,002.0 t | 0.35 | 46,200.7 |
Sub-total | 411,490.8 | 195,444.7 | ||||
Facility dependent | ||||||
Sub-total | 969,449 | 761,943.0 | ||||
Labour dependent | ||||||
Sub-total | 245,065 | 194,598.0 | ||||
Waste treatment | ||||||
Waste disposal | 3682.3 t | 13 | 47,869.9 | 3,745.4 t | 13 | 48,690.2 |
Gaseous emissions | 9749.6 t | 2 | 19,499.2 | 10,051,7 t | 2 | 20,102.0 |
Sub-total | 67,369.1 | 68,792.2 | ||||
Total cost | 2,158,141.1 | 1,545,742.1 | ||||