A process for making a renewable processed biochar pellet composition made with a pelletizing sub-system followed with a heating sub-system from a processed organic-carbon-containing feedstock made with a beneficiation sub-system is described. Renewable biomass feedstock passed through a beneficiation sub-system to reduce water content to below at least 20 wt % and an intracellular water-soluble salt reduction of at least 60% from that of unprocessed organic-carbon-containing feedstock on a dry basis. The processed feedstock is introduced into a pelletizing sub-system and then into a heating sub-system to result in renewable processed biochar pellets having an energy density of at least 21 MMBTU/ton (24 GJ/MT), a water content of less than 10 wt %, and an intracellular water-soluble salt content that is decreased by at least 60 wt % on a dry basis for the processed organic-carbon-containing feedstock from that of the unprocessed organic-carbon-containing feedstock.