Wärtsilä Waste Treatment

Waste treatment systems for cruise ships

Compliance with environmental regulations requiring effluent from cruise ships to be clean and safe can be a real challenge. Wärtsilä has a proven track-record in developing technology to meet these anticipated environmental standards. Our solutions have now set the global benchmark for wastewater management. Wärtsilä can provide the cruise market with a complete, fully integrated, wet and dry waste treatment package.

Queen Mary


A complete waste management solution

Due to the new demand from cruise yards for integrated waste treatment systems, Wärtsilä has developed a complete waste treatment package for ships where all systems are working together.

In practice, the new system of waste handling means better possibilities to reuse and recycle. Materials like metal and glass can now be collected separately inside the ship. Taken onshore when the ship comes to harbour, these materials can be transferred for recycling, and nothing goes to waste. The water is processed through a ‘grey and black water’ treatment system. The dried waste is handled together with bio-material and other burnable waste. It can be burned on-board in incinerators, which are also part of Wärtsilä’s waste-management system.


One of the benefits of a complete waste management solution is the footprint. On cruise ships, a surprisingly large amount of waste can build up in a short time. Before, the storing of the waste took a lot of space. But now, as the waste is largely managed on-board, there is less need to store it, therefore requiring less space on the ship. There are environmental benefits as well. The less energy the waste-management systems use, the less energy that needs to be produced. With total waste management the efficient process of collection, recycling and disposal in modern low-emission incinerators provides high efficiency, with the lowest impact on the environment.

    System benefits

    • IMO certified
    • Exceeds USCG, HELCOM, and Alaska effluent discharge standards
    • Simple design & operation compared to the submerged membrane or hybrid systems 
    • Safe, reliable operation with no coagulation, flocculation, chemical oxidants, or pH neutralisation
    • Compact design saves space and weight
    • Remote monitoring by specialists
    • Totally integrated systems for wet and dry waste
    • Robust construction for long life and low maintenance
    • Membrane integrity is visible and secured
    • No odor emissions due to biological process
    • Complete flexibility with newbuild, conversion, and retrofit options
    • One supplier, one complete system

    Customer benefits

    • No compliance problems, future proof
    • Cruising with peace of mind. The system meets and exceeds the likely regulatory requirements for both new and existing installations
    • Save time with easy maintenance
    • Operational peace of mind, lower power consumption, and no system blocking
    • Get more space for revenue generating areas such as cabins
    • Feeling secure, there is always an expert at hand
    • No interface issues between wet and dry waste interface
    • Lowest possible cost of ownership
    • Easily accessible when needed
    • More comfort for your personnel and passengers
    • You can receive a complete total package according to your needs
    • One point of contact, easier communication

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    Want to be more proactive?

    If you are in the cruise segment, working as an owner/operator or perhaps running a cruise yard, then there is a clear advantage in maintaining a more proactive public image. This can be achieved with a complete waste treatment package optimised for the cruise market.

    Wärtsilä as a global group can contribute with worldwide support 24/7 as well as provide main engines, propulsion equipment and much more. The complete waste treatment package that your cruise ship needs is now available from Wärtsilä. Having only one supplier for the whole package reduces your technical and commercial risks. In addition, the compact size can increase the vessels revenue in terms of more cabin space.

    Contact us

    For spare parts, please e-mail us with the Equipment Serial Number or the name of the vessel at pse@wartsila.com. For urgent support, contact +44 1202 662 693.

    For technical support & service, please email us with the Equipment Serial Number or the name of the vessel at poole.service@wartsila.com. For urgent support, contact +44 1202 662 616.

    Equipment Serial Number is taken from the equipment nameplate and includes all letters and numbers as given on the equipment nameplate.

    Please fill in the form, we aim to respond within 1-2 business days depending on the enquiry. For an existing installation, provide all necessary details to identify the installation and the equipment. Fields indicated with an asterisk (*) are required.