Aquafin uses sludge from 4 million residents as a source of renewable energy and materials. Sludge dryers are being built in Roeselare and Beringen to dry the sludge using residual heat. The dried sludge is transported to a facility in Ghent, where it is converted into energy-rich steam for electricity and heat. This reduces the CO₂ footprint of both Aquafin and Arcelor Mittal.

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