CRUISE LINER TECHNOLOGY
Advanced waste-treatment solution for passenger ships
A
TECHNICALLY advanced package of waste-treatment machinery, primarily engineered for ships with large complements such as cruise liners and cruise-ferries, is being successfully marketed to leading operators by the Norwegian specialist in this field, Scanship Environmental AS, based at Tønsberg.
Customers include Royal
Caribbean for its newest Freedom-class vessels with 5730 passengers and crew, on order at Aker Finnyards - the first, Freedom of the Seas, is destined for completion soon. Other operators to specify these systems include NCL for its new ships at Meyer Werft, also for Norwegian Jewel, completed last year; and MSC, for various liners contracted at Alstom Marine (Chantiers de l'Atlantique) - including the newest 3800- passenger (plus 1400 crew) liners recently contracted there. Many ships built and under construction at Fincantieri, in Italy, also have Scanship equipment (but without the advanced waste water section). The two newest ships to be constructed at Alstom Marine, MSC Fantasia, and MSC Serenata, will have the first Scanship systems to be awarded Bureau Veritas type-approval for a Clean Ship notation.
Scanship's systems will treat all types of wet and dry waste generated on board a modern vessel. Modules comprise vacuum food-waste treatment, advanced waste-water purification, bio-sludge de-watering/drying, and an incinerator plant. Acomplete package is comprehensive and engineered to run on a continuous basis - including the incinerators (as far as permitted by legislation). Sludge from food waste and waste water lines is dewatered separately then mixed in a bio-sludge tank.
The following drying
process is automatic, and the resulting product will, claims Scanship, burn easily in an incinerator along with dry waste. Should
Typical Scanship food-waste dewatering units.
incinerators not be permitted to operate due to restrictions, dried bio-sludge can be bagged for storage.
The whole operation is masterminded by a PLC (programme logic control) system, completely designed from scratch by Scanship itself. Touch-screen panels form the interface between operator and systems, and all screen displays have also been designed by the company.
If required,
Scanship personnel ashore can log into the system via satellite to analyse any problems reported by engineers on board a ship.
The package complies will all requirements currently in force, including those of the US Coast Guard and the Alaska Murkowski Bill (CFR 33, Part 159) for effluent discharges from the advanced water purification section. Permission for continuous discharge of effluent has additionally been granted to many cruise liners with Scanship systems, including when visiting Mediterranean ports. For dry burnable and non-burnable waste, this is normally collected by trolleys from shops, crew areas, pantries, bars, and provision stores and taken to the principal
Food waste inside a collecting tank (left) and being dewatered in a screw press (right).
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THE NAVALARCHITECT FEBRUARY 2006
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