Ultraviolet light disinfection of shellfish hatchery sea water

Brown, Carolyn; Russo, Daniel

doi:10.1016/0044-8486(79)90134-0

Cited by 33 publications

(10 citation statements)

References 10 publications

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“…The lethal effect on living cells of ultraviolet (UV) irradiation in the UV‐C spectral region is well documented and widely used for water disinfection purposes. In aquacultural systems, the method is primarily used to control fish pathogenic and health‐related microorganisms in the inlet water to fish farms and in depuration systems for shellfish ( Burrows & Combs 1968; Brown & Russo 1979; Rosenthal 1993). Fish pathogenic bacteria appear to be more sensitive to UV light than human gut bacteria.…”

Section: Introductionmentioning

confidence: 99%

Removal of particle-associated bacteria by prefiltration and ultraviolet irradiation

Liltved

Cripps

1999

Aquaculture Research

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The combined effect of pre®ltration and ultraviolet (UV) irradiation on the removal of bacteria associated with plankton fragments was investigated in an experimental¯owthrough system. The system was supplied by sea water containing fragments of Artemia nauplii in the size range 10±240 mm diameter (mean = 66 mm), as determined by particle size analysis. By applying an UV dose of 10 mJ cm ±2 , the number of colony-forming units (CFU) was reduced from 7.4 Q 10 5 per 100 mL to 2.0 Q 10 3 per 100 mL. Increasing the dose to 13 or 22 mJcm ±2 did not result in any further reduction, suggesting that bacteria associated with Artemia fragments were protected. This protection hypothesis was supported by improved overall bacterial removal ef®ciency by pre®ltration. At the highest dose (22 mJ cm ±2 ), more than 5 log 10 units total reduction was obtained by pre®ltration using 50mm mesh sizes. The reductions relative to the un®ltered sample were 1.4, 2.4 and 3.0 log 10 units using mesh sizes of 355, 80 and 50 mm respectively. It is concluded that sea water for aquacultural purposes should be ®ltered to remove particles before UV disinfection, thereby improving the overall bacterial removal ef®ciency and reducing the risk of introducing UV-shielded bacteria.

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Section: Introductionmentioning

confidence: 99%

Removal of particle-associated bacteria by prefiltration and ultraviolet irradiation

Liltved

Cripps

1999

Aquaculture Research

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“…Chemical disinfection has been reported for various species of fish eggs using formalin (Wright & Snow 1975), malachite green (Alderman 1982a), acriflavin (Wright & Snow 1975) and iodophores (McFadden 1969). Ultraviolet light as a measure of disinfecting hatchery water was reported by various workers such as Brown & Russo (1979).…”

Section: Introductionmentioning

confidence: 99%

Disinfection of Oreochromis mossambicus (Peters) eggs against commonly occurring potentially pathogenic bacteria and fungi under artificial hatchery conditions

Subasinghe

Sommerville

1985

Aquaculture Res

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Abstract. There is an increasing potential for artificial incubation of tilapia eggs. Hatchability observed in artificial systems is less than 62%. Four chemicals generally used as disinfectants for the fish eggs were tested in a controlled experiment together with ultraviolet irradiation of the water. A range of dose levels was tested for each chemical and is compared and assessed in terms of improved hatching rates. Effective disinfection improved the hatchability of eggs above 90%.

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“…The application of UV radiation in the treatment of raw influent water is effective in lowering the numbers of pathogens and thus reducting the chances of disease organisms entering from external sources (Stickney and White, 1974;Hoffmann, 1975;Kimura et al, 1976;Blogoslawski et al, 1978;Brown and Russo, 1979). Results derived from this application can be considered f a c t .…”

Section: Discussionmentioning

confidence: 99%

Pathogen Reduction in Closed Aquaculture Systems by UV Radiation: Fact or Artifact?

Spotte¹,

Adams²

1981

Mar. Ecol. Prog. Ser.

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Differential equations were used to set a theoretical upper limit for the efficacy of UV radiation in 3 hypothetical aquaculture systems: (a) a plug-flow system, (b) a n idealized closed system with no influx of pathogens, and (c) a conventional closed system in which the influx of pathogens is continuous. The equations demonstrate that, in a conventional closed system, the mass of pathogens never reaches zero even if the UV sterilizer is 100 % effective. This suggests that agents such a s UV radiation, which do not form persistent residuals, may b e incapable of preventing the spread of waterborne pathogens in systems that are recirculated. Use of UV radiation in aquaculture is most effective in sterilization of raw water supplies and discharges lnto receiving waters, both of which are singlepass applications.

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Ultraviolet light disinfection of shellfish hatchery sea water

Cited by 33 publications

References 10 publications

Removal of particle-associated bacteria by prefiltration and ultraviolet irradiation

Removal of particle-associated bacteria by prefiltration and ultraviolet irradiation

Disinfection of Oreochromis mossambicus (Peters) eggs against commonly occurring potentially pathogenic bacteria and fungi under artificial hatchery conditions

Pathogen Reduction in Closed Aquaculture Systems by UV Radiation: Fact or Artifact?

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