Ballast water treatment systems Clock ticking on BW installations P
er Tunell, head of environmental management at Sweden’s
Wallenius Lines says, ‘Planning ahead is really essential. 2016 is not far away.’ The company, which has invested in the development of Alfa Laval’s PureBallast system, was one of the first to embark on fleet- wide ballast water
management installations, with a prototype installed aboard the 5,850-car Turandot in 2003. By the end of this year, Wallenius will have PureBallast systems operating on 11 of its 35-ship fleet.
Per Tunell
Not all 35 ships will necessarily need treatment systems because some older units will be retired before the deadline. Even so, Tunell says, the retrofitting of ballast water equipment is no simple matter and should definitely not be left until the last minute. Installation capacity could well become a bottleneck, he warns, as the 2016 deadline approaches. And even though
Wallenius is well ahead of most owners, the company has a full installation timetable between now and 2015, with each one typically taking three or four men one month. Whereas installations on board newbuildings are relatively straightforward, retrofits are more complicated. There are many issues to consider, Tunell explains, and it makes sense to allow significantly more time for the first retrofits. First off, a decision on
the type of system – chemical, mechanical or physical – must be made in light of a ship’s operational area; then there is system capacity, location, piping, power requirements, whether the work should coincide with a scheduled docking and, if so, how many extra days should be allowed. Engine rooms are very busy places at such times and installation work is, at times, disruptive. Wallenius’ strategy is to install
systems using a combination of time in dock – to add a ‘T’ connection at the ballast water intake – riding gangs and calls in Europe to minimise flight requirements. Future installations will also be handled out of the company’s Singapore office. A five-phase programme covers about a week in Asia where as much preparatory work is undertaken as possible. Then, at the first European call, hardware is delivered, typically of 1,000 cu mtr/h; piping is connected during the second call in Europe; at the third, electrical systems are installed; and finally, on the fourth call, the system is commissioned. Tunell is not prepared to discuss
costs partly, it is thought, because of Wallenius’ support for the PureBallast product range. However, what he will say is that installation can vary from half to 100% of the hardware cost, depending on system capacity and space available on board. Other sources suggest that there won’t be much change from around $1m per installation for a medium-sized units.
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