The WWTP of Crispijana treats the waste waters of Vitoria-Gasteiz.

It has undergone a number of changes and extensions since it was opened in 1984.

In 1998 Cadagua took on the job of designing and constructing the secondary treatment system with nutrient removal.

Type of treatment

Biological treatment of activated sludge with elimination of N.

Main features

Location: Alava, Spain

Equivalent population: 500.000

Capacity: 120.000 m3/day

Year: 1998