Domestic wastewater
Plouvorn | 29 | FranceCapacity in IE : 2 500
Year of construction : 2007
Project owner : Commune de Plouvorn
Consultant : D.D.A.
TYPE OF TREATMENT
Water treatment- Circular aeration basin 500 m³
- 2 surface aerators 11 kw
- Deaerator
- Floating matters storage tank
- Scraper settling tank Ø 15,5 m
- Safety lagoon for storage of centrates from centrifugation
Sludge treatment- Sludge recirculation
- Sludge thickener 40 m³
- Sludge storage tank 390 m³ for mobile centrifuge decanter
TECHNICAL DATA OF PLANT
| Capacity of treatment | Treated water discharge standards | |
| Capacity of treatment | 2 500 IE | |
| Daily volume | 660 m³/d | |
| Peak flow | 100 m³/h |
| Biological oxygen demand (BOD5) | 150 kg/d | 25 mg/l |
| Chemical oxygen demand (COD) | 300 kg/d | 90 mg/l |
| Suspended solids | 225 kg/d | 35 mg/l |
| Total Kjeldahl nitrogen | 37,5 kg/d | 10 mg/l |
| Total nitrogen | 50 kg/d | 15 mg/l |
| Total phosphorus | 10 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
