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Table 6 Yearly operating costs of Grima closed system

From: Algae biodiesel - a feasibility report

Input   Cost (2003 dollars)
Culture medium (at $0.5883/kg) 65,500 kg 38,534
Carbon dioxide (at $0.4706/kg) 96,940 kg 45,620
Media filters (at $70.59/unit) 210 14,824
Air filters (at $94.12/unit) 105 9883
Other consumables (at $117.65/kg) 13 kg 1529
Cooling water (included in pumping station)   0
Power (at $0.05883/kW h) 99,822k Wh 5873
Labor (at $16/h) 8760 hours 140,160
Supervision   28,032
Payroll charges   42,048
Maintenance   35,249
Operating supplies   442
General plant overheads   111,893
Tax   24,312
Contingency   5813
Wastewater treatment (at $0.59/m3) 10,480m3 6183
Capital costs (Table 5)   332,093
Total yearly operating costs   933,995
Biomass costs ($/t)   35,649