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CEReS – co-processing of coal mine & electronic wastes: Novel resources for a sustainable future

Abstract : Most coal mines produce waste which has the potential to generate acid mine drainage 17 (AMD). If not properly managed, this can cause environmental damage through contamination of 18 ground and surface waters and soils for hundreds of years. At the same time, the pace of 19 technological development means that most electrical and electronic equipment becomes obsolete 20 within a matter of years, resulting in the generation of vast quantities of electronic waste (e-waste). 21 Where this cannot be recycled, it must be discarded. The CEReS concept is a co-processing approach 22 for both waste streams to produce metals and other valuable products, and to reduce or eliminate 23 the their environmental impact. This brings together two waste streams from opposite ends of the 24 supply chain; turning each into a novel resource in a single, coherent 'grave-to-cradle' process. This 25 industrial ecology approach is key to supporting a circular economy whilst securing the sustainable 26 supply of critical raw materials. The project successfully elaborated a novel co-processing flow-sheet 27 comprising: (i) the accelerated bioweathering of AMD-generating coal production wastes to generate 28 a biolixiviant; (ii) the pyrolysis and catalytic cracking of low-grade PCBs to produce hydrocarbon fuel, 29 a halogen brine and a Cu-rich char; (iii) the leaching of base metals from the char using the 30 biolixiviant; (iv) the reuse of stabilised coal wastes; and (v) the full or partial (as enriched substrates) 31 recovery of valuable metals. These process units were demonstrated individually at lab-pilot scale. 32
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Soumis le : lundi 17 août 2020 - 11:18:30
Dernière modification le : mercredi 19 août 2020 - 03:09:08

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Christopher G. Bryan, B.J. Williamson, J. Calus-Moszko, Q. van Haute, Anne-Gwenaëlle Guezennec, et al.. CEReS – co-processing of coal mine & electronic wastes: Novel resources for a sustainable future. Hydrometallurgy, Elsevier, 2020, pp.105444. ⟨10.1016/j.hydromet.2020.105444⟩. ⟨hal-02916045⟩

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