Biosolids mixed with sand can be destroyed via self-sustaining smouldering.
Self-sustaining smouldering of biosolids is possible with up to 80% moisture content (wet mass basis).
The energy contents of both the biosolids and the sand/biosolids mixture control the practical smouldering limits.
Injected air flow rate controls the mass destruction rate and the robustness of the reaction.
Smouldering exhibits potential as a new, energy efficient waste management approach.