AI Article Synopsis
- - The study explores how different UV doses affect the survival of the algae Tetraselmis suecica, simulating ballast water treatment and transport, using techniques like flow cytometry and standard culturing methods.
- - It finds that UV doses of 400 mJ/cm(2) or higher effectively inactivate the algae within one day, making it the recommended level for immediate treatment, while lower doses (100-200 mJ/cm(2)) show varying results based on methods used.
- - The research suggests that doses between 100 and 200 mJ/cm(2) may suffice if water is treated during intake and kept in dark tanks, but highlights challenges in determining the exact dark incubation time necessary for effective algae
Article Abstract
This study investigates different UV doses (mJ/cm(2)) and the effect of dark incubation on the survival of the algae Tetraselmis suecica, to simulate ballast water treatment and subsequent transport. Samples were UV irradiated and analyzed by flow cytometry and standard culturing methods. Doses of ≥400 mJ/cm(2) rendered inactivation after 1 day as measured by all analytical methods, and are recommended for ballast water treatment if immediate impairment is required. Irradiation with lower UV doses (100-200 mJ/cm(2)) gave considerable differences of inactivation between experiments and analytical methods. Nevertheless, inactivation increased with increasing doses and incubation time. We argue that UV doses ≥100 mJ/cm(2) and ≤200 mJ/cm(2) can be sufficient if the water is treated at intake and left in dark ballast tanks. The variable results demonstrate the challenge of giving unambiguous recommendations on duration of dark incubation needed for inactivation when algae are treated with low UV doses.
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| http://dx.doi.org/10.1016/j.marpolbul.2015.12.008 | DOI Listing |
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