- Project: WWTP Mairena and Viso.
- Entity: EMASESA.
- Location: Mairena and Viso del Alcor, Seville. Spain.
- Design flow: 9,220 m3/day.
- Population: 43,025 inhabitants
Key points - treatment
- Pre-treatment: Large particle screens, sifting, desander, sand classifier, deoiler and influent flow metre
- Secondary treatment: Biological treatment of active sludge with nitrification-denitrification and stabilisation of sludge. O2 input / Mud recirculation / Sedimentation
- Mud treatment: Thickener
- Miscellaneous: Deodorising