The purpose of this research was to determine the influence of potato pulp content (15, 20, and 25%) in a mixture with buckwheat hulls and the variable mass flow rate of the mixture (50, 75, and 100 kg·h^-1) on the following parameters: the density and kinetic durability of the obtained pellets, their heat of combustion, calorific value, and water activity. Increasing the pulp content in a mixture with buckwheat hulls from 15 to 25% and increasing the mass flow rate of the flow of the mixture from 50 to 100 kg·h^-1 caused a reduction of the density and kinetic durability of the obtained pellets and a significant increase of the water activity and moisture content of the pellets. Increasing the pulp content in the mixture from 0 to 25% caused a slight reduction of the heat of combustion, from 19.44 to 19.09 MJ·kg^-1, and calorific value (for dry matter of buckwheat hulls, and pellets from a mixture of buckwheat hulls and potato pulp).