90,000

Supplied Inhabitants

Wastewater Treatment Plant

Apraitz Wastewater Treatment Plant

General Information

  • Entity: Gipuzkoa Provincial Council
  • Location: Elgoibar, Guipúzcoa, Spain
  • Population: 90,000 eq/inhab
  • Flow: 29,904 m3/day

Key points

Technical data

  • Average DBO5: 226 mg/l
  • Head in DBO5: 6.752 kg/l
  • Average S.S.T.: 279 mg/l
  • Head in S.S.: 8,336 kg/d

Treatment

  • Coarse solids well
  • Coarse solids breakdown
  • Raw water pumping
  • Fine solids breakdown
  • Sand/silt trapping – grease trapping in 2 lines
  • Primary settling in 2 units
  • Storm water abatement tanks 1 unit
  • Primary sludge pumping
  • Flow metering
  • Biological treatment
  • Settling
  • Excess sludge pumping
  • Primary sludge thickening
  • Biological sludge thickening
  • Sludge digestion
  • Filter press sludge dehydration
  • Sludge silo storage
  • Ancillary services
  • Electrical equipment
  • Control equipment
  • Control, Store – workshop and Staff Building

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