Spring 2010

TenCate Geotube® helps to give Rio de Janeiro a greener aspect

With an eye to the 2014 World Cup and the 2016 Games in Rio de Janeiro, 2.1 million cubic metres of partly contaminated sludge must be removed from two canals. This sludge is to be safely stored in three storage and dewatering zones built using TenCate Geotube® technology, and the zones will then be landscaped as parkland. In this way Rio as welcoming city is demonstrating its commitment to ensuring a clean environment.

As host during the World Cup in 2014 and the Olympic and Paralympic Games in 2016, Rio de Janeiro is keen to make a good impression. So the city considers the revitalization of the polluted Canal do Fundão to be of great importance. It is difficult for those travelling from Antonio Carlos Jobim International Airport into the city to miss this canal and the adjacent Canal Cunha. Petrochemical waste has contaminated the Canal do Fundão over the years and now this clogged waterway is not only an eyesore but also emits a terrible odour. Still, all this will be history in four years’ time. By then the 6.5km canal will have been dredged and the water circulation and wastewater purification restored. After this, various other improvements to the urban infrastructure will be realized.

TenCate Geotube® is to play an important role in this project. This technology has been selected as an effective and economical containment and dewatering solution. A sediment layer containing heavy metals will be stored in TenCate Geotube® and, following the dewatering process, the filtered water will be returned to the adjoining bay – Guanabara Bay. Storage and dewatering are to take place in specially designated TenCate Geotube® zones on unused ground of the city’s university. The dewatering zone (or cell) is being built on the basis of TenCate grids and non-wovens, which are strong enough to safely carry the load of four layers of filled TenCate Geotube® units.

The first layer with TenCate Geotube® containers in the first cell. Eventually there will be 120 containers containers of 36.5 meters circumference x 61.0 meters long.

When operations have been completed, the tubes will be entombed and a park created on each of the three. So entry to the city centre will be green in more ways than one!

One of the zones with TenCate Geotube® units

Tom Stephens (left) and others showing Sergio Cabral (governor of Rio de Janeiro) the difference between contaminated water and water filtered by TenCate Geotube®

For a documentary about this project (08:55 min.): click here

Blue fabric (Tecawork Blue 65287)