Fixed Film role in Catalonia

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13th January 2010

Source: Eimco Water Technologies

Eimco Water Technologies has won a £5M contract with FCC Construcción y Aqualia Infraestructuras to upgrade the existing Terrassa Wastewater Treatment Plant, just north of Barcelona, owned by the Catalan Water Agency (ACA), which is the public entity of the Government of Catalonia assigned to the Department of the Environment and Housing.

The installation includes an IFAS (Integrated Fixed-Film Activated Sludge) system that will be used to improve the plant effluent quality, remove nutrients and increase the capacity of the existing plant by introducing extra biomass growing surface into the Bioreactors. This has removed the need, cost and disruption of civil construction, yet has increased the capacity of the plant by 25% (from 60.000 m3/day to 75.000 m3/day).
This additional surface area comes from a number of polypropylene Biotextiles, installed in stainless steel structures that will be submerged in the fine bubble aerated zones of the Bioreactors.
Due to the limited space available in the existing plant, the Terrassa project required specially designed sliding steel supports that allow the IFAS cages to be easily moved inside the tanks for maintenance purposes.
EIMCO Water Technologies is also installing three new secondary suction clarifiers (43m diameter) at Terrassa to improve the secondary settlement to help achieve better effluent parameters.
EIMCO Water Technologies provided FCC Construcción y Aqualia Infraestructuras with a full real scale module to show how the polypropylene Biotextiles would operate and to allow oxygen transfer tests, as well as a small pilot Biotextile cage to run performance trials, both under the Catalan Water Agency (ACA) assignment and supervision.

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