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WASTE, OIL & FRESH WATER MANAGEMENTWärtsilä Vacuum Collection SystemsThe Wärtsilä vacuum collection system uses differential air pressureto transport sewage from the toilet bowls, and other sanitary fittings,to the Sewage Treatment Plant (STP) or independent collection tank.Ejectors can be mounted direct to the STP for modular constructionwithout the need for a separate collection tank, and only a small amountof flush water is needed compared to conventional gravity systems.Features• z Ejectors can be mounted direct to the STP for modular constructionwithout the need for a separate collection tank• z Only a small amount of flush water is needed compared toconventional gravity systems• z Vertical Lift capability• z Smaller diameter piping, independent of slope• z Reduced peak loadings allow use of smaller sewage treatmentplant than for gravity systems• z Ejector performance optimised using Computational FluidDynamics (CFD)Additional optional features• z Grey water vacuum collection to separate grey water collectiontank(s)• z Retrofit to existing tanks• z Foam suppressant• z PLC interface with data logger• z Overboard discharge from vacuum circulation pump• z Controlled feed/transfer equipmentWärtsilä Vacuum ToiletsThe Wärtsilä vacuum flush toilet has been designed to be mechanicallysimple, operationally reliable, and stylish in appearance.Wärtsilä vacuum toilets use air to drive waste from the toilet to thetreatment tank or intermediate collection tank. This contemporarilystyled toilet has a built-in vacuum breaker and flush memory, is simpleto install, and is supplied ready to connect. The control mechanism canbe accessed without removing the bowl. By using only approximately1 litre of water, the amount of wastewater is dramatically reduced.Wärtsilä also offers a Vacuum Interface Valve, which provides aninterface between the sewage collection system and conventional186