VALORIZATION STUDY OF THE ORGANIC WASTE RESULTING FROM THE TOMATO CANNING BY METHANISATION

In this work, the tomato canning waste from Adrar city -southwest ofAlgeria-are valued using anaerobic digestion (AD). The inoculum is used as an alkaline agent for pH adjustment. Six substrate to inoculum ratios of 0.25, 0.5, 1, 2, 3, and 4 are investigated under mesophilic conditions (37 +/- 1 degrees C) for 45 days. The pH, chemical oxygen demand (COD), volatile solid (VS) reduction and volatile fatty acids/total alkalinity ratio (VFA/TA) are the measured parameters at the beginning and end of the digestion and the methane yield is daily measured. The best methane yield corresponds to the substrate to inoculum ratio of 0.5 with a CH4 production of 260.98 +/- 7.24 mL/g VS.