Industrial wastewater
Danone | Bailleul | 59 | FRANCECapacity in IE : 32 500
Capacity in m³ per day : 2 000
Activity : Food-processing industry
Category : Dairyhouse
Year of construction : 1998
TYPE OF TREATMENT
Water treatment- Buffer tank
- Grease separator
- Aeration basin
Sludge treatment- Biological treatment of grease
TECHNICAL DATA OF PLANT
| Capacity of treatment | Treated water discharge standards | |
| Daily volume | 2 000 m³/d | |
| Peak flow | 165 m³/h | |
| Pollution load | 32 500 IE | |
| Biological oxygen demand (BOD5) | 1 950 kg/j | 20 mg/l |
| Chemical oxygendemand (COD) | 3 500 kg/j | 90 mg/l |
| Suspended solids | 800 kg/j | 30 mg/l |
| Total Kjeldahl nitrogen | 117 kg/j | 20 mg/l |
| Total phosphorus | 20 kg/j | 6,5 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
