**3. HTC of Waste Biomass for Energy Production and Storage**

Hydrothermal carbonization has been proven to be an effective tool for waste biomass pre-treatment, to produce highly carbonaceous materials that can be used for energetic applications [59–62]. In the last 5 years, research projects have focused their attention on the possible energetic use of the HTC products as a carbon-rich material for direct combustion or as a precursor for the realization of supercapacitors [63–66]. Prior to any of its further use, hydrochar must be dried to remove all the moisture.
