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BWM Convention, RINA has carried out some studies focused on the main characteristics of some of the treatment systems available on the market and the impact of their installation on new buildings and existing ships. The ballast treatment systems analyzed consist of two main components: a mechanical filter and a “biological sediments killer unit”. In particular, the following 3 different BW treatment systems have been analyzed: -System 1: Mechanical filter, Killer unit: Oxidation technology -System 2 Mechanical filter, Killer unit: UV lamps -System 3 Mechanical filter (cyclone technique), Killer unit: UV lamps The impact of their installation on the following three existing projects has been analyzed: • General cargo ship Handysize o Ballast water transfer capacity: 1500 m3/h o Electric power installed: 3 x D.G. 740 kW (1 spare) • Product carrier (41000 DWT) o Ballast water transfer capacity: 1500 m3/h o Electric power installed: 4 x D.G. 740 kW (1 spare) • Bulk Carrier Panamax o Ballast water transfer capacity: 2200 m3/h o Electric power installed: 3 x D.G. 400 kW (1 spare – ship without cranes) In particular, the studies focused on the following main aspects: • Increase in electrical power to be provided on board • Arrangement modification due to ballast water system installation • Modification requested to ballast piping and pumps • Increase in dimensions of diesel generators • Impact on fuel oil tanks • Cost evaluation
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