ARCHWAY | SEWAGE DIGESTER

When the toilets are closed, the water level in tank 2 rises due to the displacement of water in tank 1.

As the toilet space is flooded, buoyant elements that form part of the toilet bay structure float with the rising water level to peel away the outer skin.

Once the toilet bays have been effectively peeled open, cat fish known for their cleaning abilities can enter the toilet space to perform their night time cleaning duties.