Vacuum collection system.

Vacuum wastewater collection, built for efficient vessel operation.

The vacuum collection systems from Wärtsilä Water & Waste use differential air pressure to transport sewage from the toilet bowls, and other sanitary fittings, to the Sewage Treatment Plant (STP) or independent collection tank.

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Ejectors can be mounted direct to the STP for modular construction without the need for a separate collection tank, and only a small amount of flush water is needed compared to conventional gravity systems.

Download vacuum collection system brochure

Download AVV100 interface valve brochure

Why operators choose vacuum collection systems:

Piping system is smaller & lighter than conventional gravity pipework.

Design flexibility: system can be run in any orientation, around obstacles.

Lower material and installation labor costs.

Performance unaffected by ship's motion.

Operational saving costs due to the minimized amounts of flush water needed: 1.5 litres/flush compared to 15 litres/flush with a gravity system.

Suction effect increases hygiene & reduces odour.

Built for flexible onboard installation:

Ejectors can be mounted direct to the STP for modular construction without the need for a separate collection tank.

Only a small amount of flush water is needed compared to conventional gravity systems.

Vertical Lift capability.

Smaller diameter piping, independent of slope.

Reduced peak loadings allow use of smaller sewage treatment plant than for gravity systems.

Ejector performance optimised using Computational Fluid Dynamics (CFD).

System configuration options:

Grey water vacuum collection to separate grey water collection tank(s).

Retrofit to existing tanks.

Foam suppressant.

PLC interface with data logger.

Overboard discharge from vacuum circulation pump.

Controlled feed/transfer equipment.

Explore other wastewater systems.

Hamworthy wastewater treatment solutions are designed to support different vessel requirements, operational demands, and installation constraints.
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Need support? Let’s get it sorted.

Looking for technical support, spare parts, or a tailored service solution? Our team is ready to help.

Talk to a service specialist

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