Biomethane Production as an Alternative Bioenergy Source from Codigesters Treating Municipal Sludge and Organic Fraction of Municipal Solid Wastes

Table 2

Summary of total cost estimated for the proposed biomethanization plant for 100,000 PE (adapted from Ozturk et al. [12]).

Cost components	Unit	Value
Investment
Construction works	€ (×10^6)	1.78^(1,2)
Equipment	€ (×10^6)	1.33^(3,4)
Total investment	€ (×10^6)	3.11^(5)
Total investment	€/PE	31^(6)
Annual investment	€/yr (×10^6)	0.266^(7)
Annual investment	€/PE·yr	2.66^(8)
O&M
Annual O&M	€/yr (×10^6)	0.216^(9)
Annual O&M	€/PE·yr	2.16^(10)
Total
Annual total	€/PE·yr	4.82^(11)

⁽¹⁾If investment cost of PTU is 25% of total investment cost determined for PE = 200,000 and if 45% of total investment cost is assumed as the construction work, then (2.5 × 10⁶ + 0.25 × 4.15 × 10⁶ × 0.45) = 2.97 × 10⁶.
⁽²⁾Since the values were determined for PE = 200,000, and values were corrected for PE = 100,000 by 60%, then 0.60 × 2.97 × 10⁶ = 1.78 × 10⁶.
⁽³⁾If investment cost of PTU is 25% of total investment cost determined for PE = 200,000 and if 55% of the total investment cost is assumed as the equipment work, then (1.65 × 10⁶ + 0.25 × 4.15 × 10⁶ × 0.55) = 2.22 × 10⁶.
⁽⁴⁾Since the values were determined for PE = 200,000, and values were corrected for PE = 100,000 by 60%, then 0.60 × 2.22 × 10⁶ = 1.33 × 10⁶.
⁽⁵⁾3.11 × 10⁶ = (1.78 + 1.33)  × 10⁶.
⁽⁶⁾For PE = 100,000, (3.11 × 10⁶ ÷ 100000) ≅ 31.
⁽⁷⁾If interest + depreciation + amortization, lifetime, and CRF equal 6%, 30 years, and 0.07265 for preconstruction and 6%, 15 years, and 0.10296 for equipment works, then 1.78 × 10⁶ × 0.07265 + 1.33 × 10⁶ × 0.10296 = 0.266.
⁽⁸⁾For PE = 100,000, (0.266 × 10⁶ ÷ 100000) = 2.66.
⁽⁹⁾O&M cost for PE = 200,000 would increase by 20% with PTU, and if values were corrected for PE = 100,000 by 60%, then [0.60 ×  (300,000 × 1.2)] = 216,000 = 0.216 × 10⁶.
⁽¹⁰⁾For PE = 100,000, (0.216 × 10⁶ ÷ 100000) = 2.16.
⁽¹¹⁾4.82 = 2.66 + 2.16.