An investigation has been made into accelerated hydrothermal fluidized carbonization of sewage sludge in a superheated steam medium. It is shown that an increase in the process temperature has no effect on its duration but has a significant effect on the composition of noncondensable gases. Biochar activation has been investigated in potassium hydroxide at a temperature of 750°C and the biochar–KOH ratios of 1:1.5, 1:2, and 1:3. It is shown that the KOH concentration has no effect, in practice, on the sorption characteristics of the obtained product which is more suitable for the use as a soil improver.
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 94, No. 6, pp. 1591–1596, November–December, 2021.
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Muratova, N.S., Is’emin, R.L., Melezhik, A.V. et al. Results of Chemical Activation of Biochar Obtained by the Method of Accelerated Hydrothermal Carbonization of Sewage Sludge. J Eng Phys Thermophy 94, 1557–1562 (2021). https://doi.org/10.1007/s10891-021-02436-0
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DOI: https://doi.org/10.1007/s10891-021-02436-0