A new life on green roofs for rubber grains

A new life on green roofs for rubber grains

We may not think about it on a daily basis, but there are about 120 tons of rubber grains on average.on an artificial grass field. Grains that last for no more than twelve years. Ceyes has the solution for processing the grains in a circular way.

Artificial turf fields

The lifespan of an artificial turf field (in English called 'peat') is about ten to twelve years. After these years, the whole field needs to be renewed. The old artificial turf, including the rubber grains, can be recycled. The backing is reduced to useful particles for secondary fuel and the synthetic fibers and sand are reused for new artificial turf fields. As a residual material, the rubber grain remains. And that grain can still be very useful, but not always for artificial grass fields because of the loss of elastic properties.

There are now complete factories to process artificial turf fields and recycle the rubber pellets. Ten lorries are needed for the transport of one artificial turf field. Local processing is environmentally friendly. That's what Ceyes does.

Green roofs

The new Ceyes solution for rubber granules lies in the use of granules as a drainage layer for green roofs. The current green roofs use drainage tiles of secondary plastics. On these panels there will be a filter layer on which a layer of soil is applied for the grasses or mosses. When it's raining, 25 liters of water will remain in the panel.  The water evaporates when it is dry. And on summer days it keeps the roof cool.

This system works. Instead of secondary plastic, you can also use the rubber grains. In that case, the contribution to reducing CO2 is much greater. According to a study by the Canadian University of British Columbia, 15,75 kg of CO2 per m2 is required for the production of plastic tiles. Green roofs absorb CO2, which compensates. However, it takes 13 to 32 years before the CO2 produced for the tile is in balance with the CO2 absorption through the green roof. With a life of forty to fifty years of these tiles, there will be jsut a few years left for CO2 emissions profit.

Only 3.05 kg CO2 per m2 is needed for the production of rubber rubber gratings, while the balance between production and CO2 absorption is only three to six years. Add the longer lifespan to that and it is clear that rubber is more environmentally friendly than plastic. The only disadvantage of the rubber rule is the weight: 20 kg instead of 3.5 kg per m2.

Circular economy for rubber

The basis of Ceyes's solution for the circular economic application of rubber lies in small-scale processing. Instead of putting down large factories, Ceyes, part of the C40 Cities Climate Leadership Group, wants to place easy movable small units in big cities. This will prevent large transport distances.

The artificial turf fields can be processed in a container to recover the rubber pellets for the rubber tiles for green roofs. A TILE box is available for making those tiles. After use, the tiles can still be recycled, just like the containers.

Small-scale technique

Each container has a specific function and can also be moved if desired. The TURF box is in cooperation with the French MTB, a company with thirty years of experience in tire recycling machines.

The TURF box contains shredders and sieves. The artificial turf is first reduced into a pre-cutter to crisp clumps, after which a further reduction is made in the box. Sand, rubber pellets, fibers and mat are separated.

There is collaboration with an Italian machine builder and with polymer manufacturer in England for the TILE box

In the end, Ceyes is going to sell the three boxes (the first box, the TIRE box, is for the processing of rubber tires) worldwide. In addition, the C40 cities are at the top of the list. The small-scale possibility of local tire processing makes a major contribution to the environment. On the one hand, by circular processing, and on the other hand by reducing CO2 emissions due to the much shorter transport of tires and artificial turf mats.

A great deal of innovation in circular recycling technology from Europe.

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