In the next few weeks, work will be completed on the extension of phase IV, sealing and degassing of phase III and the construction of the new leachate pond in the controlled deposit at the facilities of the Mancomunidad del Sur Waste Treatment Plant, Pinto Controlled Deposit.

The controlled deposit, located between the municipalities of Pinto, Getafe and San Martín de la Vega, which collects waste from the 72 municipalities of the Mancomunidad del Sur, has made an investment of nearly 40 million euros, with the aim of building a new landfill, sealing and degassing the controlled deposit in phase III, which had been in operation since 2006, as well as the construction of a leachate pond and other improvements.

The construction of the new landfill site (phase IV) covers an area of 12 hectares and has a capacity to receive the waste generated in the 72 municipalities that make up the Mancomunidad del Sur over the next three years. All of the earth from the excavation of the new reservoir has been used in the sealing of phase III and the construction of a platform on which, over the next few years, the Mancomunidad del Sur plans to build a new waste treatment centre, similar to the one promoted by the Mancomunidad del Este in the municipality of Loeches.
A key aspect is the construction of a leachate pond as an intermediate storage point for the leachates produced in the decomposition processes of the waste deposited in phase III and IV, for the subsequent management and disposal of these leachates.

In addition, other complementary works have been carried out, including the general improvement of the leachate pumping and electricity supply installations of phase III of the controlled deposit, the partial replacement of the paving of the perimeter road of phase III, the replacement of the lighting on the road in phases I and II giving access to phase IV (improving the facility's night-time operating conditions), the replacement of the lighting in the workshop building, the replacement of the pumps pumping the interior and exterior rainwater that reaches a low point located in the northern part of the facility.

Environmentally, a clear commitment has been made to sustainability and the recovery of the surroundings, with the planting of 2,125 units of shrub and tree species around the perimeter of the facility which, over the years, will form a green barrier that will improve the appearance of the facility from the outside.
A biostabilised material from the treatment of waste from other treatment plants in the region has been used to enrich the soil on the sealed surface of phase III and thus encourage the growth of vegetation. This is undoubtedly a clear commitment to the implementation of a circular economy model.

With the development of the project, the Mancomunidad del Sur and specifically its Pinto Biomethanisation Plant, which was the first infrastructure for the treatment and recovery of organic matter to be put into operation in the Community of Madrid, has become a pioneering, innovative and sustainable facility, capable of implementing a responsible circular economy model.

The project, in figures

EXTENSION OF PHASE IV

• 2,295,779.21m3 of open-cast excavation and internal site transport.
• 32,164.58m3 of clay to waterproof the bottom of the basin.
• 74,196.30m2 of 10mm thick bentonite geocomposite for waterproofing slopes.

SEALING AND DEGASSING OF PHASE III

• 1,078,534.00m3 of earth paving from the stockpile.
• 112,842.51m3 of vegetation cover with earth from excavation and biostabilised material.

LEACHATE POND

• 136,698.18 m3 of open-cast excavation.
• 39,167.82m3 of embankment with soil from the excavation.