Page 36: of Maritime Reporter Magazine (January 2024)

PASSENGER VESSELS

A recycling rate of 70% is technically and commercially feasible with today’s technology. – Björn Ullbro,

CEO of Evac Group due reject and food waste reject. HydroTreat turns de-watered organic waste from black/gray

With these varied sources covered, the industry is direct- water and food waste systems into biochar that is sterile and ing its attention to solid waste and dewatered sludge. A ban can be used for soil improvement or biofuel. The company on sewage sludge discharge is also expected from the IMO’s guarantees signi? cantly lower carbon emissions compared to

MARPOL review. This sludge is typically discharged over- conventional drying and incineration systems with no harmful board untreated. However, most new zero discharge cruise emissions into the atmosphere, as there is no need to combust ships specify equipment for dewatering and drying this sludge the waste. First orders of the technology have been delivered; (similar to food waste). it is also retro? ttable.

Wärtsilä’s range of zero discharge systems includes a Micro Björn Ullbro, CEO of Evac Group, explains: “According

Auto Gasi? cation System that diverts dewatered waste from to our recent study, the waste recycling rate on some of the overboard discharge or incineration and converts it to syngas in world’s largest vessels is around 20-40%. That means the vast a circular process that fuels the unit. This has been installed on majority ends up in land? lls or, even worse, in the already

Silversea Cruises’ LNG-fuelled Silver Nova, delivered in 2023. threatened oceans.” He says a recycling rate of 70% is techni-

Evac is looking to the future use of nutrients as part of its cally and commercially feasible with today’s technology. commitment to a circular economy. The newly released Evac Engineering processes continue to be improved. Valentin

RWO’s CS-MBR system remove solids including bacteria, viruses and microplastics.

Image courtesy RWO Image courtesy Evac 36 Maritime Reporter & Engineering News • January 2024

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