Wärtsilä MBR systems achieve 98% compliance in Alaska

Wärtsilä Water & Waste, part of Wärtsilä, delivered outstanding wastewater treatment performance during the 2024 Alaska cruise season. Fourteen vessels using Wärtsilä’s Hamworthy membrane bioreactor (MBR) systems achieved a 98.2% compliance rate under the Alaska Department of Environmental Conservation (DEC) testing program. This exceeded the overall fleet average of 94.7% and other manufacturers’ systems, which averaged 90.8%.

Alaska’s DEC requires all large cruise ships to submit treated wastewater samples annually. Every result is published by vessel, making this one of the world’s most transparent and rigorous marine wastewater testing programs.

Peter Satchwell, Global Sales Director at Wärtsilä Water & Waste, said: “Alaska’s Environmental Compliance Report validates system performance in real-world conditions. Our MBR systems perform reliably and consistently on vessels operating in challenging waters. Independent verification reinforces the confidence customers place in our technology.”

Wärtsilä’s Hamworthy MBR technology combines biological treatment and membrane filtration to produce high-quality effluent without chemical disinfectants. Continuous monitoring and a digital feedback loop with Wärtsilä technical support ensure consistent performance across ships, crews, and routes.

Satchwell added: “Independent verification builds trust. Alaska’s open reporting system shows that our design prioritizes compliance. We are proud to achieve this high performance and support our customers in operating safely, efficiently, and sustainably worldwide.”

The results highlight Wärtsilä Water & Waste’s commitment to reliability and environmental stewardship. Their solutions help ship operators meet strict discharge standards and protect marine ecosystems globally.

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