Table 11 Comparison of costs between Scenarios 1 and 2.
Facility | S1 cost ($) | S2 cost ($) |
|---|---|---|
Intermediate screw pump | 14,033,333 | 13,500,066 |
Biological treatment A2/O | 10,770,000 | 9,693,000 |
Final clarifier | 12,552,500 | 12,175,925 |
Internal recycle | 566,666 | 339,999 |
Return activated sludge | 1,100,000 | 1,067,000 |
Waste activated sludge | 400,000 | 388,000 |
Mechanical thickener | 1,925,000 | 2,079,000 |
Sludge disposal for ton/year | 219,000 | 182,500 |
EN-MBBR system | 0 | 150,000 |
Conception energy in a month | 190,750 | 159,021 |
Drying bed | 1,000,000 | 900,000 |
Total cost | 42,757,249 | 40,634,511 |
