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.
Location: Alava, Spain
Equivalent population: 500.000
Capacity: 120.000 m3/day