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Table 8 Operating costs of DOE open system per hectare

From: Algae biodiesel - a feasibility report

Inputs Units/ha Cost/ha (2003 dollars)
C02 (at $0.4706/kg)* 246,400 kg 115,956
N, as NH3 (at $0.25/kg) 5,936 kg 1,484
P, as Superphosphate (at $0.90/kg) 560 kg 504
Fe, as FeSO4 (at $0.50/kg) 560 kg 280
Flocculant (at $5/kg) 224 kg 1,120
Power (at $0.05883/kW h)   
Mixing 10,729 kWh 631
1 Harvesting 1,771 kWh 104
2 Harvesting 5,729 kWh 337
Water Supply 8,750 kWh 515
Nutrient Supply 521 kWh 31
Buildings 1,042 kWh 61
Other   
Salt Disposal (at $0.067/kg) 168,000 kg 11,256
Maintenance   511
Labor   562
Capital costs (Table 7)   14,417
Total yearly operating costs   147,769
Biomass costs ($/t)   1,319
  1. *Cost per unit was $0.035/kg in original report