It also has biological treatment by means of prolonged aeration and biological nitrogen elimination with a maximum capacity of 700 l/s. The facilities are complemented by a water reuse system for irrigation and industrial washing, a sludge line designed for sludge dewatering by means of filter presses, and a chemical deodorisation system with an air renewal capacity of 29,000 m3/hour.
It has a primary treatment system with three 30-metre diameter circular decanters with a maximum instantaneous capacity of 1,600 l/s, two of which can operate as a storm tank.
General Information
- Project: WWTP Baiña.
- Client: Consortium of Water Supply and Purification of Asturias.
- Location: Mieres (Asturias). Spain.
- Capacity: 43,200 m3/day.
- Population: 86,500 inhabitants.
Key points
Pre-treatment:
Large particle screens, fines screens, desander, sand classifier, deoiler and influent flow metre.
Primary treatment:
Sedimentation.
Secondary treatment:
Biological treatment of active sludge in the piston flow with nitrification-denitrification. O2 input / Mud recirculation / Sedimentation.
Mud treatment:
Thickener, floater, dehydration and post-treatment.
Miscellaneous:
Deodorising.