As the world worries about more emerging contaminants in water sources, the role of technology such as activated carbon in removing them becomes more pronounced (see GWI November 2020, P45). The need to make production of the technology more sustainable also comes to the fore. Hitherto, interest has grown in generating activated carbon from waste matter subjected to hydrother-mal carbonisation, but British start-up Carbogenics has a different proposal: creation of carbon from the pyrolysis of grit and other matter caught in the headworks of wastewater treatment plants. The adsorbent could eliminate odours from the wastewater or remove COD, ammonia and phosphate.
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