Sustainability has been part of the Dunas Arena project in Natal since its beginning. Indeed, it will continue to be a concern after the stadium is officially opened. The reuse of waste from the construction process and the collection of rainwater are among several sustainable measures taken during the project.
“We're going for the LEED certificate, which also involves construction: 99% of the materials from the demolition were reused in the ground itself. We select the materials and we have a partnership agreement with recyclable material pickers, who dispose of it”, says Charles Maia, Dunas Arena Director.
The building site of the Dunas Arena in Natal produced between two and four tons of waste every month. Though an internal programme, all recyclable material was put aside and directed to selective rubbish collection. In order to increase this environmental responsibility action even more, the Natal Arena Consortium - in charge of building the stadium – signed a partnership agreement with Natal’s Urban Services Company (Urbana) and Rio Grande do Norte’s Recyclable Material Pickers Cooperative (COOCAMAR). The goal is also to add a social benefit to the environmentally committed intervention already conducted by the Natal Arena.
All recyclable materials (such as glass, plastic, paper, cardboard and wood) collected and stored at the building site were given to the cooperative, so that they could screen the material and then, sell it to the recycling industry. Urbana was in charge of transporting and disposing of the waste correctly.
Two other social projects were also implemented at the stadium during its construction. A digital inclusion course was provided to employees, teaching them to use computers and the OAS School offered literacy training to several workers at the Dunas Arena.
The roof of the Dunas Arena collects water so it may be reused. In the middle of the structure, there are gutters that collect the water and take it to the tanks below the lower stand. The water is filtered and reused in the pitch and lavatories, going through a fully recyclable process. There are nine 3 thousand m³ tanks.
The stadium’s roof is made up of 20 petal shaped modules, designed by Australian architect Christopher Lee (who also designed the London Olympic Stadium). The structure is made up of parts in steel metal trusses, coated on the outside by a thermally and acoustically insulated aluminium zip roofing system. Internally, they are coated with a PVC prestressed membrane. The see-through polycarbonate helps to improve ventilation and lighting. In addition to the gutters for collecting water, there are see-through skylights, which provide an interesting lighting effect.