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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