Domestic wastewater
Dakar - SHS | SENEGALCapacity in IE : 8 500
Capacity in m³ per day : 595
Year of construction : 2006
Project owner : ONAS
Consultant : IBG
TYPE OF TREATMENT
Water treatment- Screening
- Grease remover
- Grit remover
- Aeration tank 1000 m³
- 2 surface aerators 22 kW
- Deaerator
- Settling tank Ø 11,50 m
- Filtration
- Chlorination
Sludge treatment- Drying beds 900 m²
TECHNICAL DATA OF PLANT
| Capacity of treatment | Treated water discharge standards | |
| Capacity of treatment | 8 500 IE | |
| Daily volume | 595 m³/d | |
| Peak flow | 60 m³/h |
| Biological oxygen demand (BOD5) | 357 kg/d | 30 mg/l |
| Chemical oxygen demand (COD) | 714 kg/d | 60 mg/l |
| Suspended solids | 357 kg/d | 30 mg/l |
| Total Kjeldahl nitrogen | 120 kg/d | |
| Total nitrogen | 120 kg/d | |
| Total phosphorus | 36 kg/d |
The Inhabitant Equivalent (IE) is a notion used in sanitation to evaluate the size of waste water treatment plants, it corresponds to an estimate of pollution caused by the "inhabitant equivalent" defined thus :
- 60 g/inhabitant/day for DBO5
- 90 g/inhabitant/day for suspended matter
- 15 g/inhabitant/day for total nitrogen
- 4 g/inhabitant/day for total phosphor
