Reuse of residual sludge from stone processing: differences and similarities between sludge coming from carbonate and silicate stones…
· TPH content is connected to mineral oils, lubricants (C12–C40), etc., coming from oil machines losses. These substances are immiscible with water and require a specific degradation process (i.e. bioremediation process) if they are not to pollute the material (Dino et al. 2014 ).