Anaerobic digestion is a natural process by which microorganisms degrade organic matter. This occurs in the absence of oxygen and its products are biogas (CH4, CO2 and traces of other gases) and an aqueous phase of suspended solids. The functioning of these systems is strongly linked to the stability of the medium in which the microorganisms coexist, for which the addition of carbonaceous materials such as biochar has been investigated. Biochar is the product of the thermochemical conversion of biomass in the absence of oxygen. Its addition to anaerobic digestion allows increasing the buffering capacity of the medium, as well as decreasing the concentration of inhibitors and working as a support for biofilm formation. In the development of this work, it is intended to evaluate the possible improvements in the yield, quality and stability of biogas obtained using biochar in anaerobic digestion. The biochar was obtained by slow pyrolysis from palm kernel shell and pruning residues, then it was used in laboratory-scale PBM assays and in pilot-scale digestion tests in a UASB system. CH4 quantification was performed using the manometric and volumetric methods, in addition to adjusting the PMB results according to certain kinetic models. A 30% yield of palm kernel shell biochar was obtained at 550°C, in addition its microporous structure and its CIC of 2.37 meq/100g were determined, ideal qualities for its addition in anaerobic digestion tests. In the PBM tests, an increase of between 44% - 53% of the volume of CH4 per gram of SV was obtained in cellulose digestion (positive control) and 12.6% for food waste. In the kinetic study, adjustments with R2 higher than 0.99 were obtained. In the UASB tests, an 80% increase in volatile solids (VS) removal per day was obtained, while the daily production of CH4 (l CH4/d) increased by 67.4%. The percentage of CH4 in biogas increased by 14% after the implementation of biochar, reaching a maximum peak of 95% of the fuel. Finally, the positive effects of the addition of palm kernel shell biochar on the anaerobic digestion of cellulose and food waste are identified, both in laboratory scale PBM assays and in pilot scale UASB systems.