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Saint Cosme en Vairais | 72 | France
Capacity in IE : 1 700
Year of construction : 2008
Project owner : Commune de Saint Cosme en Vairais
Consultant : D.D.E.
Water treatment
- Storm water tank 400 m³
- Circular aeration basin 370 m³
- 2 surface aerator 15 kw
- Deaerator
- Floating matters storage tank
- Scraper settling tank Ø 10 m
- Phosphate removal
Sludge treatment
- Sludge recirculation
- Reed beds 390 m²
Smells treatment
- Deodorizing of the storm water tank
Saint Cosme en Vairais | 72 | FranceCapacity in IE : 1 700
Year of construction : 2008
Project owner : Commune de Saint Cosme en Vairais
Consultant : D.D.E.
TYPE OF TREATMENT
Water treatment- Storm water tank 400 m³
- Circular aeration basin 370 m³
- 2 surface aerator 15 kw
- Deaerator
- Floating matters storage tank
- Scraper settling tank Ø 10 m
- Phosphate removal
Sludge treatment
- Sludge recirculation
- Reed beds 390 m²
Smells treatment- Deodorizing of the storm water tank
TECHNICAL DATA OF PLANT
| Capacity of treatment | Treated water discharge standards | |
| Capacity of treatment | 1 700 IE | |
| Daily volume | 310 m³/d | |
| Peak flow | 40 m³/h |
| Biological oxygen demand (BOD5) | 102 kg/d | 25 mg/l |
| Chemical oxygen demand (COD) | 204 kg/d | 90 mg/l |
| Suspended solids | 153 kg/d | 35 mg/l |
| Total Kjeldahl nitrogen | 26 kg/d | 10 mg/l |
| Total nitrogen | 26 kg/d | 15 mg/l |
| Total phosphorus | 6,8 kg/d | 2 mg/l |
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
