De Nora Marine Technologies has launched Mariner M64, a compact, dual-technology marine sewage treatment plant (STP) solution that combines the benefits of electrolytic (EC) and biological treatment, enabling vessels to achieve regulatory wastewater compliance with MEPC.227 (64).

The new Mariner M64 unit features biological treatment through advanced Moving Bed Biofilm Reactor (MBBR) technology with recirculation electrolysis process with reverse polarity – providing vessel operators with a small, lightweight unit that can be easily installed in compact areas, the company states. Biological treatment on the front end aligned with the recirculation electrolysis through a patent-pending design on the back end prior to discharge, the Mariner M64 unit features an easily maintainable “slider” cell and achieves effective oxidation with lower power consumption – helping reduce a vessel’s carbon footprint.

“The Mariner M64 unit breaks the historical mold of STP operations,” says Dana Casbeer, global product manager, De Nora, “and now gives operators, as well as the fishery market, the confidence of using two proven and effective technologies for effective wastewater treatment. It is perfect for vessels where space is a constraint and simple operation is required.”

Casbeer reports that there is zero chemical dosing for treatment, and automatic operation of the Mariner M64 is accomplished with the push of a button: “Designed with simplicity and compliance in-mind, it’s easily managed by crews since it contains no messy influent sewage screens or filters and is fully automated via a dynamic interface screen – providing continuous, quality discharge of wastewater."

“We understand shipowners look to us to provide a competitively priced solution, which delivers lightweight and durable equipment for installation into small footprints,” says Casbeer. “The Mariner M64 unit delivers all that and more – fully supported by a global service and parts network when needed to help operators maintain uptime.”

International Maritime Organization certification of the Mariner M64 technology is expected by the end of 2022, notes De Nora.

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