Application and analytical verification of peracetic acid use in different types of freshwater aquaculture systems

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearch


Peracetic acid (PAA) is a highly reactive peroxygen compound with wide-ranging antimicrobial effects. PAA has recently gained substantial attention, due to additional beneficial attributes such as easily degradability and harmless disinfection byproducts. However, PAA is only sporadically used by the aquaculture industry as it is difficult to apply in correct dosages. This study describes the degradation kinetics of PAA when used as an aquaculture disinfectant. Effects of temperature, organic matter content and initial PAA dosage on the chemical fate of PAA is reported. Furthermore, investigations of water sanitation with PAA application were used to analytically verify actual PAA concentration under real conditions at different kinds of aquaculture systems. A characteristic instant disinfection demand was found to be significantly positively related to water COD content, and PAA half-lives were found to be in the order of a few minutes. The study revealed that PAA degrades so rapidly that insufficient disinfection is a likely outcome. The observations have applications for optimizing water treatment strategies with PAA. The investigations also indicated that the rapid degradation and hence swift presence of PAA in RAS made raceway disinfection possible without bypassing the biofilters. Future perspectives, benefits and drawbacks on the use of PAA in RAS are discussed
Original languageEnglish
Title of host publicationWorkshop on Recirculating Aquaculture Systems Helsinki, October 5-6, 2011
EditorsAnne Johanne Tang Dalsgaard
Number of pages52
VolumeNo. 38
Place of PublicationCharlottenlund
PublisherDTU Aqua
Publication date2011
ISBN (Print)978-87-7481-136-7
Publication statusPublished - 2011
EventWorkshop on Recirculating Aquaculture Systems - Helsinki, Finland
Duration: 5 Apr 20116 Apr 2011


WorkshopWorkshop on Recirculating Aquaculture Systems
SeriesDTU Aqua Report


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