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Clean water for aquaculture
Aquaculture is playing an increasingly important role in human food consumption, and now it constitutes more than 40% of the total amount of fish products consumed.
As a result of the high population density, the use of medicinal agents to treat animal diseases is often necessary. The residue of the pharmaceutical agents can remain when fish is consumed as food or leak into the environment. This can lead to the development of antibiotic resistance not only in fish but also in the environment.
Ensuring good water quality is, therefore, a top priority, in the aquaculture industry in
particular. Fish need clean water to breathe, to move, to reproduce and to eat, and
also the fish metabolic waste needs to be removed from the water. The rate at which the quality of the water in a fish farming system can reach critical levels depends on the stocking density and the degree of water exchange or water treatment.
The excessive growth of biological contamination in the water (bacteria, algae, etc.), deprives the fish of necessities of life.
Advantages of the HP-System
Effective reduction of viruses, algae, germs and bacteria (Legionella)
Removal of existing and prevention of new biofilm
Clean water increases animal welfare and boosts growth and harvests
Medication supplementation can be reduced or avoided
The risk of the consumer of consuming contaminated food is reduced
Oxygen level in the water is increased
Very low maintenance effort and costs
Bei der bakteriellen Kontamination sind 2 Gruppen zu unterscheiden:
Natürlicherweise bei Fischen bzw. im Wasser vorkommenden Bakterien: Clostridium botulinum (v.a. Typ E Toxin), Vibrio vulnificus, Vibrio parahaemolyticus, bewegliche Aeromonaden, z.B. Aeromonas hydrophila, Edwardsielle tarda, Mycobacterium marinum
Bakterien, welche durch äußere Kontaminationsquellen (Abwässer, Fäkalien) auf/in den Fisch gelangen: Salmonella spp., Shigella, Escherichia coli, Campylobacter spp., Yersinia enterocolitica, Vibrio cholerae, Shigella dysenteriae, Enterococcen, Clostridium perfringens (nach Novotny et al. 2004)
(Gram negative Bakterien in „rot“, gram positive in „blau“)
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