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In this work we studied the decomposition of organic matter of food kitchen wastes (substrate) by sewage sludge (inoculum) from a wastewater treatment plant, through theprocess of anaerobic digestion (AD) in order to obtain biogas and to determinethe biochemical methane potential (BMP) at the end of this process. The tests were performed with substrate:inoculum ratios 1:2 and 1:3, in terms of volatile solids (VS). The most important parameters that influence AD were VS, total solids (TS), chemical oxigen demand (COD) and pH. They were measured in the course of the process in mesophilic conditions (35 °C) and retention times of 15 days. The biogas obtained was purified by removing H 2 S and NH 3 with NaOH and H 2 SO 4 traps. For experiments with inoculum and substrate, 1.235 L of biogas with 80.15 % CH 4 were recovered and for tests without substrate, 0.720 L of biogas with 90.47 % of CH 4 were gathered. The quantification of this gas was performed by gas chromatography. The results agree with biogas production and organic load decrease, expressed as COD. For experiments S:I, the BMP values obtained were 124.82 and 127.89 mL CH 4 /g VS, for 1:3 and 103.39 and 116.27 mL CH 4 /g VS for 1:2.

DETERMINACIÓN DEL POTENCIAL BIOQUÍMICO DE METANO (PBM) DE RESIDUOS DE FRUTAS Y VERDURAS EN HOGARES