The Isotherm Pwr® process is able to treat any material (liquid, solid or gas), which is feed into the reactor maintained under pressure; for gases and/or liquids (also with an high concentrations of suspended solids) , the introduction into the reactor does not present any particular problems (normal pumps are sufficient). Solids are introduced into the reactor in an aqueous suspension, the size of the solid particles being in the order of millimetres, a condition that calls for pre-grinding (but micronization is not necessary).