Table 3 Total cost (direct and indirect manufacturing cost), profit, and payback period exclude maintenance, operating supplies, laboratory charges, indirect operating costs, and general expenses during the period extended from January to December 2022
Item | 1000 person | 10,000 person | ||||
|---|---|---|---|---|---|---|
No. of units | Unit Cost ($) | No. of units | No. of units | Unit Cost ($) | No. of units | |
Direct operating cost (DOC) | ||||||
 Energy/electricity/year | 5,400 | 0.1 | 540 | 10,800 | 0.1 | 1,080 |
 Labors | 36 | 133 | 4800 | 36 | 133 | 4800 |
 Subtotal |  |  | 5340 |  |  | 5880 |
Indirect operating cost (IDMC) | ||||||
 Total operating cost (TOC) |  |  | 5340 |  |  | 5880 |
 Depreciation (4% of TCI) |  |  | 1749 |  |  | 4859 |
 Total cost (TC)/year |  |  | 7089 |  |  | 10,739 |
 Cost/m3 of treated wastewater |  |  | 0.13 |  |  | 0.020 |
 Total treated wastewater selling, $ |  |  | 10,800 |  |  | 108,000 |
 Profit $/year |  |  | 3711 |  |  | 97,261 |
 payback period/year |  |  | 11.79 |  |  | 1.39 |