Headworks or mixing chamber, three Pulsator settling tanks, 18 Aquazur open sand filters. Reagents used in the process: Coagulant, basic aluminum polychlorosulphate, flocculant, anionic polyelectrolyte, disinfectant, chlorine gas, booster disinfection, hypochlorite, additional flocculant, fluoride.
General Information
- Location: Zalla, Biscay, Spain
- Capacity: 129,600 m3/d
- Contract type: O&M
- Population served: 450,000 people
Treatment:
Headworks or mixing chamber of three push button type decanters, 18 aquazur open type sand filters.
Reagents used in the process:
Coagulant, basic polychlorinated aluminium sulphate, flocculant, anionic polyelectrolyte, disinfectant, chlorine gas, disinfection reinforcement, hypochlorite, additional flocculant, fluoride.
Sludge treatment:
- Catchment dams of filter washing and decanter purge water.
- Thickener.
- Buffer tank.
- Press filter.