More ports around the world are banning ships from using a fuel cleaning system that pumps waste water into the sea, one of the cheapest options for meeting new environmental shipping rules.
The growing number of destinations imposing stricter regulations than those set by the International Maritime Organisation (IMO) are expected to be a costly headache for cruise and shipping firms as they face tough market conditions and slowing world trade.
Reuters Newsagency reports they might have to pay for new equipment and extra types of fuel and adjust their routes.
Singapore, China and Fujairah in the United Arab Emirates have already banned the use of the cleaning systems, called open loop scrubbers, from the start of next year when the new IMO rules come into force.
Reuters has learned that individual ports in Finland, Lithuania, Ireland and Russia, have all banned or restricted such equipment, according to interviews with officials and reviews of documents by Reuters.
One British port has occasionally imposed restrictions.
Norway is also working on open loop scrubber bans around its world heritage fjords, an official with the climate and environment ministry told Reuters.
A ban on all types of scrubbers is also proposed, the official added.
The IMO rules will prohibit ships from using fuels with sulphur content above 0.5 per cent, unless they are equipped with exhaust gas cleaning systems.
The open loop scrubbers’ wash out the sulphur and some industry experts believe they are the cheapest way to meet the new global rules.
Companies that invested in open loop scrubbers will be unable to use them while sailing through those port waters.
They also fear the IMO rules could change again and ban open loop scrubbers altogether.
The world’s top cruise operator Carnival Corporation has invested more than US$500 million to deploy the devices.
Carnival’s Mike Kaczmarek, senior vice president for marine technology and refit with oversight of the group’s scrubbers program, said the port moves were “very troubling”.
“The more ports that participate in this, the greater the economic impact,” he said.
“A lot of people out there, in good faith, have made significant investments.”
Ships with open loop scrubbers docking or sailing through those ports would need to store waste in tanks until it could be discharged elsewhere or avoid the ports.
The other option is to use a scrubber with a “closed loop”, which stores the waste until it can be treated on land.
There are also hybrid scrubbers with a loop that can be open or closed.
Ship owners could also choose another energy source such as low sulphur fuel or liquefied natural gas (LNG).
Some experts say there will be enough low sulphur fuel available to avoid fitting scrubbers.
Data from Norwegian risk management and certification company DNV GL shows there will be a total of 2693 ships running with scrubbers by the end of 2019, based on current orders, and more than 80 per cent of them will be open loop devices, compared with 15 per cent using hybrid scrubbers and two per cent opting for closed loop scrubbers.
Initial research to date into the environmental impact of open loop scrubbers has produced a range of results.
The ports and authorities that have banned them have acted in anticipation of studies that conclusively show the discharge is harmful, environmental groups say.
International regulation often lags local action and the IMO rules were agreed in 2016 after years of tense discussions.
Businesses are waiting to see if the IMO rules will change.
An IMO spokeswoman said it was up to countries to make any proposal to tighten scrubber regulation, which would need consensus approval by its 174 member states.
The 28 European Union countries submitted a paper to the IMO that said the use of open loop scrubbers was “expected to lead to a degradation of the marine environment due to the toxicity of water discharges”.
It said it wanted to see “harmonisation of rules and guidance”.
A number of jurisdictions without bans, including Gibraltar, South Korea and Australia said they were investigating.
Nevertheless, many in the industry expect the rules to change.
Ivar Hansson Myklebust, chief executive with Hoegh Autoliners, said the vehicle transporter was not ordering any scrubbers.
“The open loop scrubbers have a hard time passing the front page test taking pollutants from the air and dumping them into the sea,” he said.
