Project Details


CLEANAQ will develop novel procedures for end-of-pipe nutrient removal to improve the cost-efficiency and to further reduce environmental impact of fish farming in recirculating aquaculture systems in the Baltic area. Innovative technical solutions will support one of the main aims of the BONUS program – development of a food production system with a balanced nutrient budget.

The objectives of CLEANAQ are:
1) Investigate the applicability of removing nitrate through:
i) single-sludge denitrification
ii) carbon-free woodchip denitrification
iii) non-microbial nutrient removal methods through end-of-pipe treatment of RAS effluents in the different salinities of the Baltic Sea
2) Find the optimal conditions and the most feasible process design for each method.
3) Find the most cost-efficient and environmentally sustainable end-of-pipe treatment/combination of treatments for concomitant phosphorous removal.
4) Examine the potential to integrate RAS end-of-pipe treatment and energy production.
5) Provide synthesis of scientific results obtained in CLEANAQ and in other related studies to the industrial end-users and national authorities.

The outcomes of CLEANAQ:
- New knowledge and technology options for end-of-pipe treatment - supporting visions of a nutrient-balanced production of healthy food. 
- Experimentally tested estimates of the factors controlling the efficiency of end-of-pipe nutrient removal - needed to process-optimize systems design and operation in end-of-pipe treatment. 
- Comprehensive description on the applicability of the removal methods under different salinity levels – necessary to understand the implication of salinity and the challenges that Baltic RAS face now and in the future.
- Suggestions on the most cost-efficient end-of-pipe nutrient removal method(s) – to be utilized by RAS designers and constructing companies and farmers. Can be part of coastal planning and policy-making providing possibilities for fish farming even in nutrient sensitive areas. 
- Suggestions on combining RAS with energy production (e.g. biogas) – provides possibilities for interactions between green and blue growth, and for eco-innovations supporting socio-economic development of the Baltic Sea area.

National Institute of Aquatic Resources, DTU Aqua (coordinator)
Natural Resources Institute Finland, Finland
University of Jyväskylä, Finland
Kungliga Tekniska Högskolan, Sweden
Sashimi Royal A/S, Denmark
Gala Mare OY/Sybimar, Finland
Billund Aquaculture Service A/S, Denmark
KSK Aqua Aps, Denmark

The projects is funded by BONUS EEIG (EU H2020) and Innovation Fund Denmark.

Research area: Aquaculture
Effective start/end date01/04/201728/02/2020


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