Influence of a membrane‐denitrification reactor on the microbial community of an aquaculture recirculation system

Effect of disinfection with peracetic acid on the microbial community of a seawater aquaculture recirculation system for Pacific white shrimp (Litopenaeus vannamei)

“…Nevertheless, an examination of the composition of the microflora was not performed (Liu, Straus, et al, 2017). Our former studies on the microbial community in freshwater RAS showed that a stable microflora seems to be very important in order to avoid the rapid growth of potentially fish‐pathogenic bacteria (Jung‐Schroers, Adamek, Boley, Korshun, & Steinhagen, 2019; Jung‐Schroers et al., 2016, 2018). The maintenance of stable chemical and microbiological water conditions in the RAS was therefore another reason for applying the PAA continuously.…”

Water disinfection by ozonation has advantages over UV irradiation in a brackish water recirculation aquaculture system for Pacific white shrimp (Litopenaeus vannamei)

“…This has to be considered when interpreting the data. However, commonly the main bacterial species in aquaculture systems are belonging to the γ‐Proteobacteria and are culturable and a representable overview might be possible by the used methods (Jung‐Schroers, Adamek, Boley, Korshun, & Steinhagen, 2019).…”

“…In the current study, the application of ozone showed advantages over disinfection by UV irradiation as the chemical water quality could be improved and the microflora in the whole systems stayed more stable. Our former studies on the microbial community in freshwater RAS showed that a stable microflora seems to be very important in order to avoid the rapid growth of potentially fish‐pathogenic bacteria (Jung‐Schroers et al., 2016, 2018, 2019). Especially, biofilms can act as reservoirs for potentially pathogenic bacteria (King et al., 2004), and therefore, stable biofilms formed by harmless bacterial species, like it was found in the ozone experiment, are believed to reduce the risk of infections caused by opportunistic pathogens.…”

“…Especially, biofilms can act as reservoirs for potentially pathogenic bacteria (King et al., 2004), and therefore, stable biofilms formed by harmless bacterial species, like it was found in the ozone experiment, are believed to reduce the risk of infections caused by opportunistic pathogens. It is known that differences in the microbial community in RAS cannot only be seen due to disinfection but also due to water exchange and reduced feed (Jung‐Schroers et al., 2019; Teitge, Peppler, Steinhagen, & Jung‐Schroers, 2020). General management strategies in RAS are therefore often at least as important as disinfection measures and as long as a system is well protected against invasion of pathogens from outside sources it is doubtful, whether disinfection within the system itself is useful (Blancheton, Attramadal, Michaud, d'Orbcastel, et al, 2013).…”

A review of influencing factors on a recirculating aquaculture system: Environmental conditions, feeding strategies, and disinfection methods

“…Disinfection in RAS is necessary, but excessive disinfection may reduce the maturity of microorganisms in RAS and destabilize the microbial community, resulting in reduced production performance of cultured animals (Attramadal et al, 2012). It is well known that the microbial community structure in RAS is not only related to disinfection but is also influenced by water exchange rate and feed strategy (Jung‐Schroers et al, 2019; Teitge et al, 2020b). Therefore, the operational management of RAS and disinfection measures both need to be taken seriously.…”