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”Pulse vs. Continuous Treatment: which is better for applying peracetic acid in RAS?”

Liu, Dibo; Pedersen, Lars-Flemming; Lazado, Carlo Cabacang; Strauss, David L. and Meinelt, Thomas (2016) ”Pulse vs. Continuous Treatment: which is better for applying peracetic acid in RAS?”. [“Puls- eller kontinuerlig dosering: På hvilken måde anvendes pereddikesyre bedst muligt i recirkulerede akvakultur anlæg?”.] Speech at: The 11th International Conference on Recurculating Aquaculture, Virginia, USA, 19 - 21 August 2016.

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Summary

Peracetic acid (PAA) can improve water quality in a way that does not affect the fish, the farmer nor the environment. This presentation included recent findings of ways to improve PAA water treatment strategies. The study compared two distinct way of applying PAA – either as a pulse or as low dose continuous addition. Selected markers to address potential negative impact on fish welfare were used.
Cortisol expression was temporarily increased following pulse addition but subsequently fish adapted and cortisole expression remained at low, similar levels as measured among control fish and fish exposed to continuous low dose PAA exposure. Pros and cons about PAA application and its consequences were discussed as well.

Summary translation

Pereddikesyre (PES) kan forbedre vandkvaliteten uden at påvirke fisken, dambrugeren eller miljøet nævneværdigt. Denne præsentation omfattede resultater af nye undersøgelser om at finde måder at forbedre PES vandbehandling strategier. Undersøgelsen sammenlignede to forskellige måder at anvende PES på - enten I form af en engangstilsætning (støddosering eller pulsdosering) eller I form af en lav dosis kontinuerlig dosering. Udvalgte markører der kunne indikere eventuelle negative påvirkninger hos fisken blev anvendt.
Udskillelsen af kortisol blev kortvarigt forøget efter pulsaddition, men efterfølgende tilpassede fisk sig, og kortisol udskillelsen forblev på et lavt niveau, svarende til niveauer målt blandt kontrolfisk og fisk udsat for kontinuerlig lavdosis af PES. Fordele og ulemper omkring brugen af pereddikesyre blev også drøftet.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Speech
Keywords:Fish welfare, peracetic acid, water treatment, stress, water treatment
Subjects: Animal husbandry > Production systems
Animal husbandry > Health and welfare
Animal husbandry > Production systems > Aquaculture
Research affiliation: Denmark > Organic RDD 2 > RobustFish
Deposited By: Jokumsen, Senior Advisory Scientist Alfred
ID Code:31478
Deposited On:26 May 2017 09:14
Last Modified:26 May 2017 09:14
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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