To address the deficiencies and limitations of conventional biodisc technology to improve biological nutrient removal and effluent quality.


Development of a hybrid biodisc system with biological nutrient removal, consisting of an active sludge reactor with anaerobic and anoxic chambers followed by a hybrid biodisk reactor (which combines biomass in suspension and in biofilm) and secondary settlement.

Main Data

Development of an innovative and low-cost integrated biological process for the elimination of nutrients in wastewater treatment plants.

  • Project duration: 04/11/2015-28/02/2018
  • Funding: Project co-financed by the Center for Industrial Technological Development (CDTI) of the Ministry of Economy and competitiveness and by the European Regional Development Fund (ERDF), within the Multiregional Intelligent growth Operational Program 2014-2020.
  • Budget: 350.165 €
  • Participating entities: Sacyr Agua and the Environmental Engineering Group (GIA) of the University of Cantabria (UC).


Project's strengths:

  • Improving effluent quality
  • Resistance to hydraulic and organic overloads and fluctuations
  • Low implementation and operation costs
  • Minimizise environmental impact