The look-up table WWTP_TYPE is used for selecting facilities. It also helps to understand the coding in table FACILITIES.
TYP_LOSS , the percentage of typical loss in the treatment plant due to infiltration and evaporation, is from the master plan. This figure is important to convert from wastewater inflow to wastewater effluent.
Note: This table was recently changed and needs still to be updated under ORACLE.
| CODE | DESCRIPTION | TYP_LOSS | COMMENTS |
|---|---|---|---|
| - | others or n/a | 0 | |
| 0 | Not WWTP | 0 | |
| 1 | pond | 25 | |
| 2 | activated sludge | 5 | |
| 3 | extended aeration | 5 | |
| 4 | aerated ponds | 20 | |
| 5 | Imhoff tanks | 5 | |
| 6 | trickling filters | 5 | |
| 7 | trickling filters + maturation pond | 10 | |
| 8 | extended aeration + maturation pond | 10 |