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Chemical and physical treatment options to kill toxic dinoflagellate cysts in ships' ballast water


Bolch, CJ and Hallegraeff, GM, Chemical and physical treatment options to kill toxic dinoflagellate cysts in ships' ballast water, Journal of Marine Environmental Engineering, 1, (1) pp. 23-29. ISSN 1061-026X (1993) [Refereed Article]

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Copyright 1993 Gordon and Breach Science Publishers

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More than 5000 culture-produced resting cysts of the toxic marine dinoflagellate Gymnodinium catenatum were subjected to a wide range of chemical (chlorine, copper sulphate, hydrogen peroxide, pH, salinity and a commercial microbiocide) as well as physical (heat) treatments. Effective treatment to prevent germination of dinoflagellate cysts in seawater samples could be achieved with high concentrations of free chlorine (500 ppm) or hydrogen peroxide (5000 ppm). However. the high costs involved and environmental as well as ship' s safety considerations render these options impracticable as a routine treatment method for ships' ballast water (25 000 to 100 000 t capacity). In contrast, the heating of ballast water (30-90 s at 40-45C) may provide an effective, environmentally friendly solution to the global problem of ballast water transport of unwanted marine organisms.

Item Details

Item Type:Refereed Article
Keywords:ballast water treatment, dinoflagellate cysts
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Phycology (incl. marine grasses)
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Control of pests, diseases and exotic species in coastal and estuarine environments
UTAS Author:Bolch, CJ (Associate Professor Christopher Bolch)
UTAS Author:Hallegraeff, GM (Professor Gustaaf Hallegraeff)
ID Code:111253
Year Published:1993
Deposited By:Ecology and Biodiversity
Deposited On:2016-09-06
Last Modified:2016-10-25

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