Madrid City Council to invest €72.5 million in upgrading Rejas WRP

El Ayuntamiento de Madrid adecuará la Estación de Aguas Residuales de las Rejas

Madrid City Council will adapt and upgrade the Rejas Water Reclamation Plant (WRP) following the declaration of the entire Jarama river basin as a sensitive area. This action will reduce discharges from the plant into the river. Borja Carabante, delegate for the Environment and Mobility, announced that the City Council’s Governing Board had ratified a call for tenders for the design and execution of the works, with a total budget of 72.5 million euros.

The Rejas WRP went into operation in 1984 as part of the Madrid Integrated Sanitation Plan (PSIM) and was originally designed to achieve compliance with the discharge parameters in a non-sensitive area. The recent declaration of the entire Jarama basin as a sensitive area makes it necessary to carry out comprehensive refurbishment of the plant, which will involve complete renovation of the biological treatment process.

The works will commence at the end of this year and are scheduled for completion within a period of 63 months (3 months for the drafting of the design and 60 months for the execution of the work). Work will be carried out on the water line, the sludge line and the biogas line, including associated complementary actions and installations.

In parallel to the drafting of the design, specific odour control studies will be carried out in order to determine the most suitable systems to be installed in accordance with air flows and pollutant characteristics. An optimal solution will also be provided for the dispersion and dilution of odours in outdoor areas, in order to ensure that the plant boundaries and nearby green areas are not impacted. These studies will also include an acoustic study to determine the noise emitted by equipment at the plant and optimum soundproofing measures. A soil contamination study will also be carried out prior to the commencement of the works.