Biochar is the solid product that remains when biomass is heated to temperatures typically between 300°C and 700°C while being completely or partially oxygen-free. Experiments were carried out through the year of 2022 at Department of Agricultural Engineering, Faculty of Agriculture, Damietta University, Egypt. In this study, four types of biochar were used (sawdust - rice straw -Bagasse – the discarded leaves of palm trees) along with two types of binders (molasses and starch) and three diameters of the extruder (20 mm, 30 mm, 40 mm).  During the experiments, the results showed the highest compressive strength was 2170 N when using sawdust waste and molasses a binder at an extruder diameter of 20 mm, the highest shear force was 848 N when using starch and sugar cane waste at an extruder diameter of 40 mm.
 The maximum value of pelletizing efficiency and machine productivity were 80 % and 52.36 kg/h, respectively, when using sugar cane waste and starch at an extruder diameter of 40 mm, respectively.  The lowest value of specific energy consumption was 0.04 Kw.h\kg when using sugar cane waste and starch at an extruder diameter of  40 mm. The lowest operational cost was 0.378 L.E\Kg when using sugar cane waste and starch at an extruder diameter of 40 mm.