Evaluación del tiempo de digestión anaerobia para materia orgánica mediante un modelo piloto de relleno sanitario

Abstract

The present work aims to evaluate the anaerobic digestion time (DA) for organic material and the production of leachate within a separate solid waste management under zero rainfall conditions; through the construction of two pilot reactors simulating a landfill cell; the first reactor was filled with organic waste in its original state and the second reactor with crushed organic waste. During the investigation it was determined that the factor that principally influences the progress of the DA is the pH, which remained around 5 until the moment of the alkalinization, with which it was possible to reach a pH around the neutral in the reactor 1, which did not happen in reactor 2, because the rate of acidification in this reactor was higher. During the operation the internal temperature of 18,20 and 18,30 ° C for reactor 1 and reactor 2 respectively (psychophilic range). The humity of the residues was similar in both reactors (80%), since the SV/ST and C/N ratio are inversely related to the pH. With respect to the quality of the leachate generated there is a decrease in COD concentration of about 18 and 5% in reactor 1 and reactor 2 respectively.