‘Not a Solution,’ Says Germany’s NABU, Citing CE Delft Study
Marine operators using scrubbers to meet emissions restrictions may be swapping air pollution for water pollution, says NABU, a German organization dedicated to wildlife conservation. NABU recently released a study it commissioned with CE Delft, in The Netherlands.
Scrubber technology, says NABU, “is not a solution for reducing air pollutants in waterways.”
“Obviously, no one has seriously investigated the effects of scrubbers on the marine environment,” NABU CEO Leif Miller said in a release. “The study shows that scrubbers [are] at the present time both environmentally and economically highly questionable.”
LNG Is Preferred
NABU instead advocates a switch to liquefied natural gas or MGO/marine gas oil (diesel) in combination with particulate and nitrogen oxide catalysts.
“Although the IMO wash-water criteria for scrubbers are generally met, if there is insufficient dilution, scrubbers may have a negative impact on the marine environment in the form of acidification, eutrophication and accumulation of hazardous hydrocarbons and heavy metals, particularly in ports and coastal areas,” states a report summary.
“The use of MGO or LNG is inherently cleaner than the use of seawater scrubbers because no contaminated wash water is discharged,” states the CE Delft report.
The 45-page Scrubbers – An Economic and Ecological Assessment, details the differences between open- and closed-loop scrubber systems and includes discussion of both upfront and ongoing costs of scrubbers and LNG fuel.Click here to purchase a premium subscription.
Source: NABU with HHP Insight follow-up