Use of standard test organisms for sound validation of UV-based ballast water treatment systems.
Mar Pollut Bull
; 144: 253-264, 2019 Jul.
Article
em En
| MEDLINE
| ID: mdl-31179995
ABSTRACT
To challenge ballast water treatment system (BWTS) efficacy for organisms in the size-class 10-50⯵m, intake concentration during tests must reach certain minimum requirements. Often, natural concentrations are too low to meet intake requirements and standard test organisms (STOs) are added. We tested the robustness of Tetraselmis suecica and Odontella sp. to a range of UV-treatments to explore fluences needed to meet the IMO discharge standard (<10 org. ml-1) evaluated using two viability assessment methods. To meet discharge standards, fluences of >1000â¯mJâ¯cm-2 were required using vital stain whereas 135-500â¯mJâ¯cm-2 were needed using regrowth assays. Besides, results suggest that T. suecica and Odontella sp. were at least as robust as natural algae towards UV-treatments. We suggest the advantageous use of these species as STOs in test water to support intake water requirements and to obtain more conservative validation of UV-based BWTS to ensure more environmental protective procedures.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Raios Ultravioleta
/
Purificação da Água
/
Clorófitas
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Águas Residuárias
Tipo de estudo:
Guideline
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article