Hydrothermal Treatment of Coal Discards and Sewage Sludge for the Production of Advanced Materials
Laboratory carbonisation tests on discard and slurry samples blended with sewage sludge, with the resulting chars tested as adsorbents for dissolved pharmaceuticals. For waste and water treatment planners.
Coaltech | June 2023
Co-treating coal discards with sewage sludge by hydrothermal carbonisation gave hydrochars with better physicochemical properties than treating either waste alone. The blended hydrochar reached a surface area of 20.35 m2/g and a pore volume of 0.38 cm3/g, and removed 97.19% of nevirapine and 93.32% of lamivudine from recycled water. Routes to activated carbon and hydrogen storage were also assessed.
Description
The disposal of coal discards (CD) and sewage sludge (SS) is a substantial problem to waste management in coal beneficiation and wastewater treatment plants (WWT). This work investigates essential aspects for contributing to the reduction of environmental effects, with a particular emphasis on the hydrothermal carbonization technology for the synergetic treatment of CD and SS to produce value-added carbonaceous materials. When compared to the individual treatment of CD and SS, the Co-hydrothermal carbonization method improved the physicochemical attributes of the produced hydrochars (HC). The produced HCs could be suitable for a wide range of potential applications i.e., soil amendment, WWT, production of activated carbon.
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