The MV82 plant (STP)-The facts
The septage treatment plant MV82 will treat, when it will open at the beginning of 2012, the septage sludges produced by the on-site sanitation in the north-east of the Tarn-et Garonne. The plant’s presentation with some figures.
General facts
Nominal capacity 11 000 m³/year or 200 m³/week
Opened at the end of 2012
Contracting authority : Syndicat Mixte Départemental des Déchets-SMDD
Delegated contracting authority : Communauté de Communes des Terrasses et Vallée de l’Aveyron – CCTVA
Project engineer : Ginger Environnement Infrastructures – GEI
Constructor : to be determined after consultation
Associated firms : waiting for consultation
Technical facts
Receiving water : Montrosies stream, affluent of Courounets, affluent of the Aveyron river
Rejection norm : BOD < 25 mg/l ; CDO < 125 mg/l ; SS < 150 mg/l for the summer discharge
Winter serie: pretreatment + VFCW (vertical flow constructed wetlands)+ ponds
Summer serie: pretreatment + VFCW+ spreading on plantation
Dimensions: 50kg SS/m². year
Stages: the works are constructed from the beginning for the final treatment capacity regarding the little difference between the actual septage contributions (10500m³/year) and the ones to come (11000m³/year).
Performances : Consult The MV82 plant (STP)- The performances
Particularities:
- autonomous system (the septage are usually treated on big WTP)
- extensive process (the septage are usually treated with extensive processes)
- using primary pond as a complementary treatment in winter
- using treated waters to water the plantatio
The primary ponds integration in the treatment steps (only in winter) improves the discharging quality for weak construction and running costs.
