San Colombano - Florence
Process: Activated Sludge
Client: Publiacqua S.p.A.
Completed in: 2010
The waste Water treatment plant is located on the left bank of the river Arno and it is part of a large environmental project interesting an area around Florence of 200 hectares and serving eight municipalities.
Sewage treatment
- Coarse screening 20 mm and fine screening at 3 mm
- Aerated Degritting with grease removal (number 6 chambers each for 540 m3)
- Primary Clarification (number 3 circular basins, 59 m diameter)
- Biological selector
- Anoxic/Denitrification basins (number 3 basins each of 24,000 m3)
- Aerated/Nitrification basins (number 3 basins each of 8,000 m3)
- Secondary Clarification (number 9 circular basins 55 m diameter)
- Disinfection
Sludge treatment
- Thickening by centrifuges
- Two stage Anaerobic Digestion (number 6 digesters 4,500 m3 each)
- Sludge dewatering by centrifuges
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