A treatment plant with 3 anoxic chambers prior to aeration to boost biological elimination of nitrogen and phosphorus, as in a lot of waste water from washing machines is treated; prior to the outlet water the old trickling filters are used as a backup because the treated water already leaves in ideal conditions.

Type of treatment

Biological activated sludge, tertiary trickling filter system.

Main features

Location: Balearic Isles, Spain

Equivalent population: 9.375

Capacity: 1.875 m3/day

Year: 2002