Ultraviolet disinfection of water in recirculating aquaculture system: a case study at sturgeon caviar fish farm
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Date
2022-07
Authors
Semenov, A. O.
Semenova, K.
Семенов, Анатолій Олексійович
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Abstract
Description
In this report, we present a practical example
of ultraviolet (UV) water disinfection in an aquaculture facility
for sturgeon caviar production. Among the methods of water
disinfection in recirculating aquaculture systems, the technical
approaches using ozonation or ultraviolet radiation in combination
with other methods are the most effective. However,
improper use of ozonation can result in excessive ozone concentrations
that can cause serious harm to fish and be harmful
to the environment and personnel. Therefore, we describe
an example of a reagent-free ultraviolet water disinfection
system. Preliminary results show that filtration followed by
ultraviolet irradiation inactivates microorganisms in fish tank
water. Total microbial count, total coliform bacteria, and E. coli
(CFU/m3) did not exceed the permissible values. The described
UV system provides an irradiance of 180 W/m2. For a pool with
a water volume of 300 m3, bacteriological purity of the water
was achieved with 480 W of UV-light.
Keywords
aquaculture, fish, sturgeon, recirculation system, UV water disinfection