Dissemination of results from BONUS CLEANAQ

Aquaculture Europe 2019 Conference

Results from the BONUS CLEANAQ project were disseminated at the Aquaculture Europe 2019 Conference, which was held from the 8th until the 10th of October in Berlin.

On Thursday, the 10th of October 2019, three presentations, originating from the BONUS CLEANAQ project, were given within the Baltic Aquaculture Session of the AE2019 Conference:

  • Xiaoyu Huang from the Technical University of Denmark presented results from a laboratory experiment, supervised by Carlos Octavio Letelier within the BONUS CLEANAQ project, where step fed batch reactors (SFBR) were operated with external and internal carbon sources to remove nitrogen from RAS water. According to his results, acetate showed the highest nitrate removal rates (57.64±6.55mg N/h/g bacteria) in SFBR followed by propionate and ethanol.

  • Gunno Renman from the Royal Institute of Technology in Sweden investigated reactive filter media within the BONUS CLEANAQ project and found that they were effective at removing phosphorous from RAS effluents. In the laboratory up-flow packed bed columns, Polonite removed low phosphorous levels to near-zero levels. The performance of Polonite was followed by Sorbulite and Vermiculite, which showed a lower removal efficiency for phosphorous. He pointed out that once the Polonite is saturated with phosphorous, it could be directly applied as a valuable fertilizer on land, where it slowly releases phosphorous to the fields.

  • Sanni Aalto from the University of Jyväskylä, Finland investigated the microbiology of denitrifying woodchip bioreactors in freshwater and seawater, with or without additions of bicarbonate. She concluded that efficient nitrate removal in woodchip bioreactors treating saltwater requires favorable conditions for autotrophic denitrifiers, e.g. through inorganic electron donors or using H2S produced in the sulfate-rich saltwater RAS. 


10 MAY 2021