|Meinelt, Thomas - Leibniz Institute Of Freshwater Ecology And Inland Fisheries|
|Pedersen, Lars-flemming - Technical University Of Denmark|
|Straus, David - Dave|
|Liu, Dibo - Leibniz Institute Of Freshwater Ecology And Inland Fisheries|
Submitted to: International Conference on Recirculating Aquaculture
Publication Type: Abstract Only
Publication Acceptance Date: 4/29/2016
Publication Date: 8/19/2016
Citation: Meinelt, T., Pedersen, L., Straus, D.L., Liu, D. 2016. Disinfection with peracetic acid (PAA), an alternative against fish pathogens [abstract]. 11th International Conference on Recirculating Aquaculture, August 19-21, 2016, Roanoke, Virginia. 2 p.
Technical Abstract: Because of the lack of approved substances to treat fish diseases, disinfecting substances are tested to treat fish pathogens. These agents should not leave dangerous residues in the environment in order to successfully contribute to sustainable aquaculture. One of these substances is peracetic acid (PAA). PAA is an agent used for disinfection in aquaculture, but it must be investigated thoroughly in order to mitigate diseases without harmful effects on fish. We studied the effectiveness of several commercial PAA products to reduce fish pathogens in Vitro and developed in Situ treatment strategies. The tested commercial PAA products showed different molecular PAA: H2O2 ratios. The fish pathogens tested in Vitro were the bacteria Aeromonas salmonicida, Yersinia ruckeri and Flavobacterium columnare; the fungus Saprolegnia parasitica and the protozoa Ichthyophthirius multifiliis. Effective concentrations and exposure times of PAA products were determined and compared. One PAA product was tested in Situ in a rainbow trout RAS to reduce losses caused by bacterial gill disease (BGD). With two-day applications of 2 ppm PAA, the colony forming units (CFUs) were reduced from 106 to 104. The clinical symptoms of the BGD and the losses of fish were reduced. Although the application was done in the raceways of the RAS without a disconnection of the filter, the nitrifying bacteria were not affected.