300,000

Equivalent Inhabitants

Headworks or mixing chamber

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 
  • Equivalent population: 300,000 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.

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