Developed by Yara Marine Technologies, the new, lightweight in-line scrubbers are a hybrid technology that can operate in open loop, closed loop and closed loop with bleed-off mode.
Norwegian Sun and Norwegian Jade each had five scrubbers installed, one per engine, covering the whole propulsion system. Collectively, they are capable of reducing up to 99% of sulfur oxides and 85% of particulate matter.
Norwegian became the first cruise line to install scrubbers with water membrane filtration units in 2016. This sophisticated system uses ultrafiltration technology to clean the recirculated water down to clear water during the closed loop operation. The by-product is collected and removed in drums.
Besides Norwegian Jade and Norwegian Sun, the other retrofitted shups are Norwegian Pearl, Norwegian Gem, Norwegian Escape, Norwegian Joy and Pride of America.
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