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Biological treatment of activated sludge, with elimination of nitrogen and phosphorus by biological means.

General Information

  • Project: WWTP and Thermal Drying of Sludge in Sant Julià de Lòria
  • Location: Sant Julià de Lòria (Principality of Andorra)
  • Design flow: 30,000 m3 / day
  • Population: 100,000 inhabitants / eq
  • O&M period: 2010-2025
  • Thermal drying with a daily design capacity: 20,600 kg. H2O evap / d
  • Thermal drying with a maximum hourly capacity: 1,300 kg. H20 evap / h

Key Aspects

Pretreatment:

  • Coarse well with clamshell spoon, coarse grating, sieving, grit remover, degreaser, flow limitation to biological with rainwater tank

Secondary treatment:

  • Biological treatment of activated sludge, with elimination of nitrogen and phosphorus by biological means. O2 / Recirc contribution. Sludge / Settling

Sludge treatment:

  • Mechanical thickener and centrifugal dehydration

Various:

  • Fat reactor
  • Deodorization by chemical washing
  • Reception and treatment of external sludge from septic tanks, cleaning of sewage network and external fats
  • Sludge drying
  • Reception of external sludge
  • VOMM fluid bed drying
  • Pelletized dry sludge storage.
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