with compliant sewage treatment plant. Accordingly, Hamworthy has followed up with a significant number of orders.
New horizons Now slotting into the company’s water treatment capability is ballast water management – the issue identified by IMO as one of today’s four main concerns in the marine environment. Last year, Hamworthy acquired
Greenship, the innovative developer of the SEDINOX ballast water management, then at an advanced prototype stage. Bringing the operation under its Water Systems division, itself already augmented in recent years through the acquisition of Serck Como, Hamworthy has moved quickly from prototype to commercial offering, and towards the approvals that will bring the SEDINOX system to a wider market. Te Hamworthy SEDINOX management
solution uses a combination of cyclonic separation in its first stage to manage the removal of sediment down to 20 microns, and electrolysis as the means of killing organisms in the second stage. Competing approaches that use first
stage filtering tend to achieve a 50 micron sediment level, which has consequences for power use in second stage treatment. In the second stage of the Hamworthy process, lower power is required and, critically, no chemicals are injected, but the system still achieves a 99.9% disinfection rate of the zooplankton, phytoplankton and bacteria contained in ballast water. In picking out SEDINOX from a range of
possible acquisitions, Hamworthy homed in on the fact that, not only did the technology address the environmental issue at hand; its wider environmental impact could be shown to be less than competing systems through its eco-friendly solution to sediment build up. Hamworthy’s SEDINOX system separates
organic and inorganic matter, preventing particles from passing through the system and being carried to the ballast tanks, where they can settle and a new breeding ground for micro-organisms could be created. Unlike other systems, the Hamworthy approach thus eliminates the particulate matter responsible for settlement. It is sometimes overlooked that the full intention of the Ballast Water Convention
The Naval Architect September 2010 145
is: ‘Control and Management of Ships Ballast Water & Sediments’. Permanent ballast sediment formed in ballast tanks also concedes displacement available for cargo carriage, as well as meaning a higher fuel bill and higher emissions. It may also bring additional disposal costs, if such sediment were deemed hazardous waste. Fur ther demonstration that
environmental concerns touch all aspects of today’s marine market is through the encouragement Hamworthy Svanehøj, Hamworthy’s specialized cargo and fuel pump specialist, is giving ship owners to choose electrically-driven pumps over their hydraulically-driven counterparts.
Hamworthy’s electrically-driven deepwell pumps offer operators a reliable, safe and energy-saving alternative for handling crude product on FPSO/FSO vessels. The company points out that in the
operational phase electric equipment is more environmentally friendly because C02 emissions are cut due to higher efficiency. Hence lower power utilisation, less fuel usage and there is no risk for spillage of hydraulic oil. Significant interest in the merits of electric driven deepwell pump systems has been expressed by tanker owners and builders for crude and clean oil products handling in the Handy-sized to Panamax tonnage
range.NA
In-depth
Come and see us at SMM 2010
Hall A1 / Stand 712
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