Wastewater treatment plant
Name of the client/building owner
CGI-Palmeraie Déveoppelent Groupe Addoha
Function of building
Degree of enclosure
Mediterranean - mild winters, dry hot summers
Number of layers
Type of application of the membrane
Basins of sewage treatment plants are more frequently covered to contain odors and gases, limiting algal growth, and protect the watershed precipitation.
One of the key issues of this project is to select a product with a long expected lifespan, because of the corrosive atmosphere of the hydrogen sulfide basins. The priority is to focus on solutions that ensure the least possible contact between susceptible materials to corrosion and stale air. Structural elements immersed in the effluent have to be avoided.
Effective, aesthetic and durable, the TextiDôme covers the basin thanks to its considerable size (more than 80m in diameter without interior supports). The suspended textile membrane (Ferrari membrane 1202S) confines odors and gases. The cover is supported by a galvanized steel frame on the outside, like a giant spider's web. The attachment of the textile membrane are located inside. The connection points are from stainless steel or galvanized steel. As the atmosphere inside is extremely corrosive, rusting of the connection points may be possible. In this extreme case, the oxidized parts are visible and easy to change. The metal structure is the remaining non-corrosive area.
The "TextiDôme" solution was adopted for the project to cover the STEP in Bouskoura, a structure with a covered surface of 2000m². It is the first realization in Morocco and Africa, which was completed in a record time of 4 months.
Description of the environmental conditions
Material of the cover
FERRARI 1202 S
Main dimensions and form
Covered surface (m2)
Duration of use
Temporary or permanent structure