Tekniska Museet
100 Innovations - Tekniska museet

An exhibition at the National Museum of Science and Technology in Stockholm, 2012 – 2018

the sewage system

The sewage system

Ingress för att beskriva innovationen

the sewage system

Part of Käppala waste water treatment plant on Lidingö, Stockholm, Sweden. It was renovated between 1994 and 2000 and today it is one of the most efficient water treatment plants in the world. Photo: Manne Lind.

the sewage system

We take clean, nicely decorated bathrooms for granted, but in many parts of the world they remain a luxury. Photo: Ellinor Algin.

Kort fakta om innovationen

Kort fakta (2) om innovationen

Rubrik för små genier

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Rubrik för allvetare

Taking care of dirty water is essential for health. As early as the time of the Roman Empire there were already sewage systems. Yet they are something that 40% of the world´s population lack.

In the 1850s they began to suspect a link between poor sanitation and diseases such as cholera. They then dug sewage pipes down into the ground. But the sewage pipes went straight into the nearest watercourse. Eventually it was realised that a sewage system needed a treatment plant.
In sewage treatment plants, sewage water is treated using mechanical, chemical and biological methods. Treating the water takes about 24 hours. Some residual products are recycled into for example biogas.

Rubrik för nördar

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