Innovative technologies for reducing the discharge of phosphorus from land-based aquaculture systems (39932/104050)

To avoid environmental impacts in terms of eutrophication, Danish fish farmer are regulated by their discharge of nutrients including nitrogen (N), phosphorus (P) and organic matter (OM). Many farmers, however, have problems complying with current BAT requirements regarding their specific discharge of P. 

In FosVind we seek to reduce the discharge of P from land-based freshwater and saltwater aquaculture systems by: 
i) Developing and testing a P-optimized feed for rainbow trout and Atlantic salmon that minimizes their specific excretion (kg P/ton fish produced) of dissolved and particulate P. Reducing the specific discharge of P will not only enable farmers to comply with BAT requirements but may also allow them to increase their production without increasing the environmental impact.
ii) Developing and testing a simple, cost-effective technology that uses crushed concrete as filter material for adsorbing and removing dissolved P from aquaculture effluents.

Partners 
National Institute of Aquatic Resources, DTU Aqua (coordinator)
BioMar A/S, Denmark
Snaptun Fisk A/S, Denmark
Danish Aquaculture Association, Denmark 
Consultant: Lundby Fisk, Denmark

Funding
The project is funded by the European Maritime and Fisheries Fund and the Danish Fisheries Agency.

Research area: Aquaculture