Evaluation and optimization of biofilterelements and operating conditions (Biofilter) (39584)

Project Details


Biofilter elements/media are central to biofilters applied in all RAS and ModelTroutFarms type III (and some type I as well). Microbes on the media converts toxic ammonia to non-toxic nitrate in a two-step nitrification process: ammonia to nitrite, nitrite to nitrate. Generally, the conversion capacity is considered to be linearly dependent on the available surface area of the media.This is probably a simplified and in-accurate approach, since loading and operating conditions might be more important and perhaps e.g. volumetric turnover is after all a more accurate expression, if any.

The aim of the project is to evaluate different types of media and to quantify the importance of different operating conditions on the turnover of ammonia /TAN) and nitrite.

Four work-packages are included in the project: 
1) lab-test of different biofilter media under controlled conditions.
2) test of specific media on commercial trout farms.
3) research and evaluation of different operating conditions for nitrification kinetics.
4) dissemination of results to the industry.

National Institute of Aquatic Resources, DTU Aqua
Danish Aquaculture Association (coordinator)

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

Research area: Aquaculture
Effective start/end date17/12/201830/06/2021


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