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Food waste are the main component of the municipal solid waste and given their high content of organic matter, have high potential for methane production through the anaerobic digestion. However, the predominance of lignocellulosic material hinders its hydrolysis. In this study, by means of assays of biochemical methane potential, the effect of different thermal pre-treatment conditions of the substrate was evaluated by applying temperatures between 72 - 128°C and exposure times of 15 - 33 minutes on the conditions on the performance of CH4. To evaluate the effect of pretreatment, we used the Response Surface Methodology accompanied by the application of first order kinetic and modified Gompertz models. The identified kinetic parameters were validated using confidence levels using the fisher information matrix. It was found that the optimal region, to reach a higher yield in the anaerobic digestion with regard to the production of CH4 higher than 150mLCH4gVS-1 and lag-phase times less than 1 day, was around 100°C with exposure times close to 15 minutes, condition in which a greater solubility was reached and positively improving the hydrolytic stage of the anaerobic process.

Efecto del pretratamiento térmico de residuos de alimentos sobre la producción de metano