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Heavy Fuel Oil (HFO)

A review of fate and behaviour of HFO spills in cold seawater, including biodegradation, environmental effects and oil spill response

By: Janne Fritt-Rasmussen,Susse Wegeberg,Kim Gustavson,Kristin Rist Sørheim,Per S. Daling,Kirsten Jørgensen,Ossi Tonteri,Jens Peter Holst-Andersen

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Heavy Fuel Oil (HFO)

A review of fate and behaviour of HFO spills in cold seawater, including biodegradation, environmental effects and oil spill response

By: Janne Fritt-Rasmussen,Susse Wegeberg,Kim Gustavson,Kristin Rist Sørheim,Per S. Daling,Kirsten Jørgensen,Ossi Tonteri,Jens Peter Holst-Andersen

Shipping activities across the Artic are expected to increase with decreasing sea ice cover, thus increasing the risk of oil spills. Heavy Fuel Oil (HFO, a mixture of residual fuel and distillate diluent) is often used as fuel in marine vessels as it is relatively cheaper than e.g. lighter marine fuels. Knowledge about fate and behaviour of HFOs is important to select the most efficient countermeasures in an oil spill situation as well as in the risk assessment of possible oil spills in cold waters. The aim of this review is to collate and strengthen the knowledge base on HFO in cold seawater, its fate and behaviour, including weathering, biodegradation, environmental implications of HFO spills and HFO spill response including environmental considerations regarding use the of chemical dispersants and in situ burning. Knowledge gaps and research needs are identified and described.

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Page Count

92

Publisher

Nordic Council of Ministers

Published Date

ISBN 10

9289358513

ISBN 13

9789289358514

Low Sulphur Fuel Oil (LSFO)

Identification of environmental impacts in a cold marine environment

By: Fritt-Rasmussen, Janne,Reunamo, Anna,Røyset, Jon Arve,Bjerkemo, Ole Kristian,Gustavson, Kim,Lassen, Pia,Tonteri, Ossi,Wegeberg, Susse,Jørgensen, Kirsten S.

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Low Sulphur Fuel Oil (LSFO)

Identification of environmental impacts in a cold marine environment

By: Fritt-Rasmussen, Janne,Reunamo, Anna,Røyset, Jon Arve,Bjerkemo, Ole Kristian,Gustavson, Kim,Lassen, Pia,Tonteri, Ossi,Wegeberg, Susse,Jørgensen, Kirsten S.

Available online: https://pub.norden.org/temanord2022-558/ A growing number of low sulphur fuel oils (LSFOs) are being marketed as a result of new international rules to reduce the sulphur content of ship fuels. This project aims to strengthen the knowledge base on environmental fate and behaviour of LSFO spills in cold seawater. The project includes laboratory experiments to investigate the effectiveness of combating LSFO spills by in-situ burning and chemical dispersion, and the potential for biodegradation. The results indicated that the LSFOs tested had a limited potential of natural and chemical dispersion, were ignitable and that between 20-50% were biodegraded in cold seawater. Overall, the results indicate that the tested LSFOs likely have a high degree of persistence on the sea surface and shoreline even when chemical dispersion or in-situ burning is attempted.

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Page Count

58

Publisher

Nordic Council of Ministers

Published Date

ISBN 10

9289374454

ISBN 13

9789289374453