A multi-stage method for the hydrothermal treatment of renewable raw materials, in which - in a first step, a liquid containing the renewable raw material is provided, - which in a second step is subjected to hydrothermal treatment at a temperature between 150 °C and 250 °C, - in a third step, a solid present after the hydrothermal treatment according to the second step is separated from the liquid, and - the residual moisture of the solid is largely removed by drying in a fourth step, yielding a particulate carbon material, characterized in that the STSA surface area and the OAN value of the particulate carbon material obtained in the fourth step are controlled by mutually matching - the concentration of the organic dry matter of the renewable raw material in the liquid containing the renewable raw material, - of the pH value of the liquid containing the renewable raw material, - the concentration of inorganic ions in the liquid containing the renewable raw material, - the temperature of the hydrothermal treatment and - the residence time in hydrothermal treatment, in such a way that an STSA surface area of at least 5 m 2 /g and at most 200 m/g 2 and an OAN value of at least 50 ml/100 g and at most 150 ml/100 g is adjusted, and wherein the particulate carbon material has a water content of less than 5 wt. -%. - in a first step, a liquid containing the renewable raw material is provided, - which in a second step is subjected to hydrothermal treatment at a temperature between 150 °C and 250 °C, - in a third step, a solid present after the hydrothermal treatment according to the second step is separated from the liquid, and - the residual moisture of the solid is largely removed by drying in a fourth step, yielding a particulate carbon material, characterized in that the STSA surface area and the OAN value of the particulate carbon material obtained in the fourth step are controlled by mutually matching - the concentration of the organic dry matter of the renewable raw material in the liquid containing the renewable raw material, - of the pH value of the liquid containing the renewable raw material, - the concentration of inorganic ions in the liquid containing the renewable raw material, - the temperature of the hydrothermal treatment and - the residence time in hydrothermal treatment, in such a way that an STSA surface area of at least 5 m 2 /g and at most 200 m/g 2 and an OAN value of at least 50 ml/100 g and at most 150 ml/100 g is adjusted, and wherein the particulate carbon material has a water content of less than 5 wt. -%. characterized in that the STSA surface area and the OAN value of the particulate carbon material obtained in the fourth step are controlled by mutually matching - the concentration of the organic dry matter of the renewable raw material in the liquid containing the renewable raw material, - of the pH value of the liquid containing the renewable raw material, - the concentration of inorganic ions in the liquid containing the renewable raw material, - the temperature of the hydrothermal treatment and - the residence time in hydrothermal treatment, - the concentration of the organic dry matter of the renewable raw material in the liquid containing the renewable raw material, - of the pH value of the liquid containing the renewable raw material, - the concentration of inorganic ions in the liquid containing the renewable raw material, - the temperature of the hydrothermal treatment and - the residence time in hydrothermal treatment, in such a way that an STSA surface area of at least 5 m 2 /g and at most 200 m/g 2 and an OAN value of at least 50 ml/100 g and at most 150 ml/100 g is adjusted, and wherein the particulate carbon material has a water content of less than 5 wt. -%.