This page contains a Flash digital edition of a book.
Feature 1 | BALLAST WATER SYSTEMS Debut retrofit gets seal of approval


OceanSaver’s first retrofit installation of a ballast water treatment system has been approved by DNV.


water treatment on the car carrier, Höegh Trove, has confirmed that it now has DNV class approval for such installations. DNV’s approval process involved the detailed evaluation of various safety aspects, including the new power balance of the Höegh Trove, stripping procedures for the ballast tanks, hydrogen evacuation from the disinfectant units and the testing of ballasting sequences. “The class approval process required engagement with DNV experts


T from


several disciplines and our success has set the standard for all future retrofit installations in the deep sea market,” claims Tor Atle Eiken, senior vice president, sales and marketing at OceanSaver. Technical feasibility is one the most


important issues that has to be evaluated when retrofitting a treatment system, points


he Norwegian company OceanSaver, which last


year supplied and commissioned its first retrofit ballast


out Jad Mouawad, senior engineer, cargo handling and piping systems with DNV. He adds: “Our surveyors worked closely with the ship owner and equipment supplier to achieve a result that meets everyone’s expectations for efficient operations and the safety of ship, crew and the environment.” Te system installed on Höegh Trove is fully


integrated with the ship’s existing automation system and is capable of handling ballast water at a rate of 1000m3


/h. Te retrofit is based


on OceanSaver’s Mark I technology, which includes filtration, cavitation, disinfection and nitrogen super saturation as treatment stages. It is expected that a further nine OceanSaver systems will be installed on Höegh vessels over the next few years. OceanSaver also launched its next


generation Mark II system in mid-2011, which has gained DNV type approval in the past few months. Te Mark II ballast water treatment system is similar to the Mark I


model, but with some of the more energy consuming features removed. Te energy required for the complete system and related equipment is said to be 50% less for Mark II than Mark I. Te Mark II OceanSaver, furthermore, introduces better performing filtration technology and significantly reduces the amount of piping installations required, saving both time and money during installation. Up to now OceanSaver has mainly


focused on the larger vessel size market, but the company expects that the latest Mark II equipment will be well suited for medium- sized vessels as well. Eiken says: “Te shipping industry has already responded very favourably to Mark II, which reduces installation time and complexity for retrofit and newbuilding projects without a compromise on quality. Te Mark II offers lower entire lifecycle costs, including spare parts, energy consumption and manpower.” SRCT


Offshore contract gives Optimarin a boost


Te Norwegian firm Optimarin has signed a deal with DOF, one of the largest offshore shipping companies in the world, to supply ballast water treatment technology to its vessels.


(BWT) systems to its offshore fleet, which includes platform support vessels, anchor handling tugs, and construction support vessels, between 2012 and 2015. The bulk of the contracts are retrofit projects, although there are newbuild options within the agreement. “Tis agreement shows that Optimarin’s


O 28


commitment to provide the full scope of high-efficiency BWT systems and related services creates value for a global company like DOF that is focused on safety, reliability, and operational efficiency. Te majority of the retrofit business will coincide with DOF drydocking agendas during the contract


ptimarin has signed a framework agreement with DOF for the delivery of ballast water treatment


period”, says Tore Andersen, director, Optimarin. DOF


operates worldwide


and it is considered most likely that the required drydocking activity will take place in Asia, the Far East, Brazil and North Sea regions, notes Andersen. Te agreement is expected to save DOF substantial time and cost in terms of repeat negotiations, but, most importantly, it should give DOF contractual certainty, allowing it to meet regulatory requirements covering its fleet. “Our system is very modular, easy to install and requires a small footprint. Tese are key advantages when serving DOF’s retrofit demands where some installations will be made under vessel operation or during extremely tight drydock deadlines,” says Andersen.


Te Norwegian ballast water treatment


manufacturer continues to improve its Optimarin Ballast System (OBS) technology and over the past year, has implemented a software update that regulates the power consumption of the UV lamps that form a key part of OBS. Based on the UV intensity, which is measured and fed back to a control panel, Optimarin can automatically regulate the amount of power being consumed. Te new approach is designed to reduce power when the vessel is in clear water conditions and increase it when water conditions are poor. Experience to date is said to show that the soſtware can cut power consumption by up to 50% of the maximum level. SRCT


Shiprepair and Conversion Technology 1st Quarter 2012


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