La China WWTP

La China WWTP

Operation and maintenance of La China WWTP.
The WWTP is located in the municipality of Madrid, in the Manzanares river basin. This treatment plant treats a flow of 321,855 m3 / day with a load of 1,355,000 equivalent inhabitants. The residual water comes from the municipal term of Madrid.

The treatment process consists of: 

  • Pretreatment
  • Primary decanting
  • Biological treatment by active sludge
  • Secondary decanting
  • Tertiary treatment; sand filters and mesh filters
  • Sludge treatment by gravity thickener (primary sludge), flotation thickener (secondary sludge), anaerobic digestion and dehydration by band filters.


Treated volume (m3/d)

1 year

Contract period


Sacyr's participation