Domestic wastewater
Project Yemgas - Bal Haf | YEMENCapacity in IE : 400
Capacity in m³ per day : 60
Year of construction : 2007
Project owner : Yemgas
Consultant : Kellog - Technip
TYPE OF TREATMENT
Water treatment- 2 settling tank with sludge digestion Ø 4,70 m
- Biodisc length 6 m
- Sedimentation tank Ø 3,50 m
- Chlorination
Sludge treatment
- Sludge storage in the digester
Smells treatment
- Deodorizing of the digesters
TECHNICAL DATA OF PLANT
| Capacity of treatment | Treated water discharge standards | |
| Capacity of treatment | 400 IE | |
| Daily volume | 60 m³/d | |
| Peak flow | 15 m³/h |
| Biological oxygen demand (BOD5) | 20 kg/d | 20 mg/l |
| Chemical oxygen demand (COD) | 48 kg/d | 125 mg/l |
| Suspended solids | 18 kg/d | 30 mg/l |
| Total Kjeldahl nitrogen | 6 kg/d | |
| Total nitrogen | 6 kg/d | |
| Total phosphorus | 1,61 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
