Feature 3 | WASTE TREATMENT RETROFITS
He continues: “Our system is very
modular, easy to install and requires a very small footprint. These are key advantages when serving the retrofit market where many installations will be made under vessel operation or during extremely tight drydock deadlines.” OptiMarin a Norwegian company
based in Stavanger, is a pioneer in ballast water treatment systems. Te company delivered the world’s first ballast treatment system to the Regal Princess, a Princess Cruise ship, in 2000 and subsequently delivered a total of seven systems prior to the introduction of current IMO regulations. This included retrofits to three cruise ships, one container vessel, one product tanker and two ro-ro vessels, the majority of the retrofit work taking place during voyages. OptiMarin has now delivered a further
eight units of its current BWS design, including one system for Klaveness, two for Neptune Offshore, one for Gulf Offshore, six for K-Line Offshore and two for Siem Offshore. Te company reports it is currently in final negotiations with
several major ship owners and yards with regards to delivering more systems from the end of 2010 onwards. OptiMarin highlights the Gulf Offshore
project, which took place in August last year when the company retrofitted the Gulf Mariner during a drydocking at GMC Maritime in Stavanger. According to Mr Sanner: “Tis has been a successful installation and we have been able to improve the installation while the system has been operating in the North Sea. Since our type approval was first issued DNV has verified that OBS can regulate the power consumption based on readings from the Ultraviolet (UV) sensor which results in dramatically lower power consumption. On average there is a 50% reduction, which is an great advantage and this has all been achieved with a soſtware update to the existing installation.” OBS is based on solid separation
(filter) as pre-treatment and high doses of UV irradiation for inactivation of marine organisms, viruses and bacteria, without affecting the normal operation
of the ship. Ballast water is treated both during ballasting and de-ballasting to ensure a dual effect and the system is one of very few treatment options that do not introduce chemicals, electro-chemical generators or biocides. OBS, which is modular using
standardised components for all flow configurations, is designed to be simple and flexible for both installation and operation onboard any type of vessel. The systems are typically sold as component-based solutions ready for installation by the customer, as having separate components allows greater flexibility and relative ease of installation. Customers can also order pre-assembled containerised systems or skids that are ready to be installed when a ship is in port. Te OBS is normally installed in the
pump or engine room and preferably in close proximity to the ballast pumps. Te equipment can be installed horizontally, vertically, on suspended below deck, along the ship’s side or in several separate locations. SCRT
Aalborg tests AquaTricomb BWS solution
Te Danish firm Aalborg aims to be able to market a new system for treating ballast water next year.
E
arlier this year Aalborg Industries unveiled its AquaTriComb ballast water treatment system and says it is
targeting both the newbuilding and retrofit markets with this technology. Testing of the system is in progress and shipboard trials are scheduled to run until this December. Results to date are said to have been very positive. AquaTricomb has a flexible design
allowing a skid arrangement that facilitates installation and makes more space available for ballast water treatment. It can be arranged in a number of different ways, Aalborg points out, for example with filter units in one place onboard, with Ultraviolet (UV) reactor units placed separately in another location. Land-based tests were carried out at
Te Royal Netherlands Institute for Sea Research (NIOZ) on the Dutch island Texel, and with the satisfactory completion
38
of this phase Aalborg Industries commenced sea-based tests on the general cargo vessel Timbus sailing in Northern European waters. Type approval has been applied for with the German authorities, the Bundesamt für Seeschifffahrt und Hydrografie (BSH). The technology has been developed
by Aalborg Industries Water Treatment, a joint venture between Aalborg and Aquaworx ATC of Germany. Aalborg Industries says it expects to be ready to launch the AquaTriComb ballast water treatment system for commercial operation by early 2011. AquaTriComb is a system for treating and
cleaning ballast water using a combination of three technologies: filtration for pre-treatment, low pressure UV light for disinfection and ultrasound for cleaning.
Tanks to the use of ultrasonic technology the system is self-cleaning and thus almost entirely maintenance-free. The system is designed to clean ballast water without the use of chemicals and combies a high level of efficiency with low operating costs and a small footprint for onboard installation. No generation of chemical substances takes place and energy requirements are relatively low, Aalborg states. To be in full compliance with the
International Maritime Organization (IMO) legislation, the AquaTriComb solution is active during deballasting, where the water is again passed through the system for cleaning and filtration. Tis ensures that bacteria and micro-organisms in the inaccessible ballast tanks and channels of the ship are effectively eliminated and only treated water is returned to the sea. SCRT
Shiprepair and Conversion Technology 4thQuarter 2010
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64