Once all testing is complete Hamworthy expects to secure IMO type approval for the Aquarius range by the end of 2012. The company also highlights its
capabilities in the retrofit sector. According to Thomas: “Our full turnkey approach of fers system selection and installation matched to the requirements of any particular ship type and its operating profile. In addition we can provide ongoing technical and aftersales support for the life of the equipment.” He points out
that the retrofit
sector will benefit in particular from Hamworthy’s decision to opt for a modular approach to system design
in both cases so that equipment can be flexibly arranged to suit conditions onboard. Furthermore, both the systems can be designed and supplied to treat ballast water across a full range of ballast pump sizes. Ratification of
the IMO’s Ballast
Water Convention (BWC) is generally expected to occur during 2012 and become legally enforceable 12 months later at some point in 2013. The BWC requires ships included in the regulation to meet strict ballast water quality standards at the point of discharge (Regulation D2) and to operate an approved BWMS as defined in the IMO implementation plan also
contained within the BWC. Thomas shares
some of general
concerns being expressed within the industry as to the retrofitting of BWMS to existing ships in the world fleet which are captured under the BWC. This is estimated to involve around 50,000 vessels and questions about the availability of sufficient shipyard and manufacturer resources to carry out the system updates and integration have emerged repeatedly during the debates surrounding this issue. Thomas also highlights the fact that training for ships’ crews will have to be carried out both in the BWC regulations and the specific BWMS installed. SRCT
Balpure targets larger vessel projects
Severn Trent de Nora is aiming to retrofit larger types of vessel using its Balpure technology.
June 2011, was designed around the more difficult retrofit market right from the beginning, the company points out. Severn Trent De Nora is targeting larger vessels with higher flow rates and larger ballast water capacities to take advantage of lower per tonne operating and capital investment
S costs. The flexibility of
supplying Balpure as a skid-mounted system or as sub-assemblies points to its suitability for such retrofits, the company states. Already it has some experience with
retrofit projects which it aims to build on over the coming months. In 2010, the Balpure system was installed in sub-assemblies on American Progress, a 46,000dwt, double-hull tanker, operated by SeaRiver Maritime. The vessel was subsequently accepted into the United States Coast Guard Shipboard Technology Evaluation Program (STEP) and was authorised to discharge treated ballast water in California in August 2010. More recently, in January 2012, Severn Trent De Nora announced
evern Trent De Nora’s Balpure ballast water treatment system, which received type approval in
electrolytic disinfection technology which is superior, based on efficacy, durability and low operating costs.” The system’s slip stream treatment
approach and optional sub-assembly component design allows for extremely flexible installations when compared to other ballast water treatment systems, McGilivray adds: “Our design approach allows the
system to be remotely
mounted away from the ballast lines, while the ability to split the Balpure system into small
A skid-mounted Balpure unit.
that it had won a contract from Greenway Shipping to install Balpure on a series of offshore barges. These also require Balpure to be supplied in sub-assemblies due to the tight engine room configuration. Jim McGilivray, Balpure general
manager, says: “The technology remains the same, whether it is supplied as a skid-mounted system or in sub-assembly configuration. In both cases the Balpure system uses
Shiprepair and Conversion Technology 1st Quarter 2012
minimises the need to relocate other equipment and make additional ship re-designs.” Several sub-assemblies that together
make up the Balpure system can, in turn, be remotely mounted away from each other, including on multiple decks. This allows small available spaces to be used in the engine room or other locations. According to McGilivray: “This sub-assembly component design also makes for simple loading of the ballast water treatment system components into the vessel in the yard in preparation for installation and commissioning.” SRCT
23 sub-assemblies
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