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With the new sulfur limit coming into force in 2020, ship owners and operators are looking to comply with the regulation, and a debate has ensued over the use of scrubbers. What are open-loop and closed-loop scrubbers? How harmful are scrubbers to the environment? We look at what’s behind the debate.
A quick recap of the new sulfur regulation: In October 2016, the U.N. International Maritime Organization (IMO) announced that it will limit the sulfur content of bunker fuels to 0.5 percent, compared to 3.5 percent now in most parts of the world, as of 2020.
The new regulation, which aims to protect the environment and human health, affects many parties in supply chains: including ship owners and operators, cargo owners and companies that use ocean freight to transport their products, and third-party logistics providers offering ocean freight services. Roughly 90 percent of world trade is by sea and sulfur-rich fuel powers the merchant fleet of about 95,000 vessels, including container ships.
Scrubbers under scrutiny
Ship owners and operators, including boxship carriers, are already weighing their options to comply with the new sulfur regulation. One option is to use ‘scrubbers’, systems that clean exhaust gases. Ships can install scrubbers to ‘clean’ emissions before release into the atmosphere, meaning that they can continue to use high-sulfur fuel and still comply with the 0.5 percent limit.
Scrubbers recently became the focus of attention due to their possible impact on sea pollution. The IMO, following a meeting of its sub-committee on pollution prevention and response in London at the end of February, has called on countries, organizations and its own experts to carry out more studies on the environmental impact of open-loop scrubbers on the sea.
Vessels using open-loop scrubbers discharge scrubber wastewater into the sea, whereas closed-loop or hybrid scrubbers allow for temporary storage and later disposal of scrubber wastewater.
The main point of contention is the impact of open-loop scrubbers on the marine environment, as well as potential effects of pollution on sensitive marine areas. Open-loop scrubbers are allowed by the IMO, but face pressure from some regions, most recently being prohibited in China and Singapore.
Existing studies show conflicting results on the environmental impact of scrubbers:
Meanwhile, the EU will ask the IMO’s Marine Environment Protection Committee meeting in mid-May to consider developing rules for scrubber discharges. The EU proposal does not table specific measures, but it introduces the idea of restricting, or even prohibiting, scrubber water discharges in certain cases as one possible scenario.
In response, scrubber advocates, including the Clean Shipping Alliance lobbying group, have criticized the EU for pushing through this proposal to the IMO about creating harmonized rules for scrubber water discharges.
The scrubber market is already booming as ship owners and operators turn to retrofitting to comply with the sulfur limit:
Apart from the environmental impact, scrubbers are also raising technical issues. Just like any other retrofits or equipment modifications, scrubbers could lead to potential technical problems such as corrosion and extra power consumption. Analysts point out that ship owners choosing to fit scrubbers on their vessels could risk a depreciation of asset values in the long run.
Some are playing it safe. Japanese line ONE, for instance, will fit scrubbers on up to 10 vessels in early 2020, although the company still expects the majority of its fleet to use compliant fuel to comply with the new sulfur limit. The move to scrubbers will only make economic sense if prices for low-sulfur fuel are significantly higher than that for high-sulfur fuel, something which remains unknown at this time.
The IMO’s 2015 scrubber guidelines provide guidance on the testing, survey, certification and verification of scrubbers. These guidelines are not mandatory, but they set standards internationally and are to be revised by 2020.
“We are in constant contact with our ocean freight customers,” says Joerg Twachtmann, Panalpina’s global head of Ocean Freight FCL. “Panalpina is informing customers about price developments on specific trade lanes, developing a transparent and competitive pricing mechanism to get the most effective costs from carriers to cargo owners, and helping customers avoid potential supply chain disruptions.”
Panalpina’s sulfur helpline is email@example.com
That was a quick summary of the debate over scrubbers. Tune in for our next blog post, which will look at other options for complying with the sulfur limit.