Sewage Treatment Plant, Bottrop, Germany

Sewage Treatment Plant, Bottrop, Germany

Bottrop Germany Sewage treatment plant Concrete renovation Betofix R4 SR Silicate system

The Emscher wastewater treatment plant is one of four central treatment plants at Emscher and is located in the Welheimer Mark district of Bottrop. The first sewage treatment plant was installed at this location in 1929, which mechanically purified all the river water.

The current sewage treatment plant purifies up to 8,500 litres of water per second. The catchment area of the plant covers the river systems of the Boye, Schwarzbach, Lanferbach, Holz-, Resser- and Sellmannsbach. It covers 240 km² in the area of the cities of Bottrop, Bochum, Essen, Gelsenkirchen and Gladbeck.

The four egg-shaped digesters of the Emscher sewage treatment plant, almost 50 meters high, can be seen from afar. The digestion towers look very futuristic, especially when illuminated at night with blue steel, which also serves as a landmark.

Reference identification data
Construction project:
Concrete restoration
Building type:
Clarification / bio-gas plants, sewage treatment
Short description
Considerable damage was visible at digester No. 4 as a result of a biogenic sulphuric acid attack (BSK attack) to the concrete. The structural condition analysis revealed advanced damage to the concrete surface. In some areas it showed indentations of up to 5 cm. The dome area was also to be given a new coating.
Emschergenossenschaft Kläranlage Bottrop
Ibb Althans & Hesselmann GbR - Technische Berater
Peter Presch GmbH - Betoninstandsetzung
Site address:
46238 Bottrop
Data sheet:
Date / completion:
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Sample of products or systems used

More information

Concrete repair with the Silicate-System


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Further references

The structure showed cracks in some places, for which there were different causes. Improved statics and higher load capacity were achieved by stiffening the structures, frictional connection of the disturbed foundation and decoupling the components gate, passage hall and gate houses components. Particularly on the western side, intense blackening of the rock surface had built up, which was strongly interlocked with the ground. The deposits were composed of a mixture of soot and plaster. The cleaning process carried out in 1990 with the help of water could only result in a superficial cleaning. In 2002, the newly developed method of particle beam cleaning and cleaning by laser made it possible to remove soot and plaster without destroying the original surface.
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On the façade surfaces of Kaispeicher A, there was a lot of efflorescence and lime aging, both signs of penetrating moisture. The damage patterns indicated a lack of frost resistance as well as no protection against driving rain. The listed façade required extensive frost and moisture protection, but was not allowed to undergo any visual changes.
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