Evaluating efficacy of filtration+UV-C radiation for ballast water treatment at different temperatures

To prevent new ballast water-mediated introductions of aquatic nonindigenous species (NIS), many ships will soon use approved Ballast Water Management Systems (BWMS) to meet discharge standards for the maximum number of viable organisms in ballast water. Type approval testing of BWMS is typically co...

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Bibliographic Details
Published in:Journal of sea research 2018-03, Vol.133, p.20-28
Main Authors: Casas-Monroy, Oscar, Linley, Robert D., Chan, Po-Shun, Kydd, Jocelyn, Vanden Byllaardt, Julie, Bailey, Sarah
Format: Article
Language:English
Subjects:
Aquatic invasive species
Ballast
Ballast water
Ballast Water Management System
Chemical reactions
Climate
Community composition
Culture techniques
Deactivation
Effectiveness
Filters
Filtration
Inactivation
Irradiance
Irradiation
Low temperature
Management systems
Metabolic rate
Organic chemistry
Organisms
Phytoplankton
Plankton
Radiation
Removal
Ships
Temperature
Ultraviolet radiation
Water management
Water purification
Water treatment
Zooplankton
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Summary:To prevent new ballast water-mediated introductions of aquatic nonindigenous species (NIS), many ships will soon use approved Ballast Water Management Systems (BWMS) to meet discharge standards for the maximum number of viable organisms in ballast water. Type approval testing of BWMS is typically conducted during warmer seasons when plankton concentrations are highest, despite the fact that ships operate globally year-round. Low temperatures encountered in polar and cool temperate climates, particularly during the winter season, may impact treatment efficacy through changes in plankton community composition, biological metabolic rates or chemical reaction rates. Filtration+UV irradiance is one of the most common ballast water treatment methods, but its effectiveness at low temperatures has not been assessed. The objective in this study was to examine the efficacy of filtration+UV-C irradiation treatment at low temperatures for removal or inactivation of phytoplankton and zooplankton populations during simulated ballast water treatment. Organisms from two size classes (≥10 to
ISSN:1385-1101
1873-1414
DOI:10.1016/j.seares.2017.02.001