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19.11.2018 Second plant for thermal treatment of asphalt granulate

Recycling Kombinatie REKO BV, Rotterdam, the Netherlands, has started construction of a new thermal treatment plant that will process an annual 1.2 million tonnes of residual mineral waste – a mix of tar asphalt granulates and roof-linings  – into clean sand, gravel, electricity and heat. The project, which will be realised in Rotterdam’s port area, involves a total investment of €125 million.

REKO produces sand, gravel and fillers from mineral residues. Most of the waste materials processed by the company come from road reconstruction (asphalt fragments) and building projects (roof linings). This in-house development resulted in the construction of the first thermal treatment plant, which REKO commissioned in 2006. Since then, this system has effortlessly processed some 600,000t of mineral residues annually. Over the past 12 years, the facility has already produced some 7.2 million tonnes of clean sand and gravel for the Dutch construction industry.

During processing, the asphalt is thermally treated in a rotary kiln at a temperature of 1000°C, leading to the complete incineration of all harmful components. Energy recovery from the hot flue gases is accomplished by a waste heat steam boiler with a close coupled steam turbine which converts the heat into electric power. The facility generates approximately 30,000 megawatts of electricity annually – roughly the equivalent of the annual power requirement of some 7500 households.

The new thermal treatment plant will be considerably more efficient since it will benefit from latest technological developments. In addition, REKO will be taking advantage of 12 years of experience in the field of thermal treatment. For example, the new system’s power requirement is not only substantially lower than its predecessor – it will also generate a considerably higher amount of energy, electric power sufficient for no fewer than 50,000 households. Moreover, the system will not only supply power, but also heat for district heating.


Aerial view of the site for the new REKO thermal treatment plant in the Rotterdam port area

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