Testing the Biomethane Yield of Degradable Wastes of Meat Industry by BMP Test

The optimal mix of solid waste from the meat industry (MI) for anaerobic digestion (AD) treatment can be selected by defining the biomethane potential (BMP test) of the waste in relation to the unit value of chemical oxygen demand (COD). In this paper, the BMP test of biodegradable wastes from MI has been performed. For the purposes of the experiment, two types of input substrates have been defined: manure (manure from cattle depots and transport vehicles for cattle transport) labeled as O1 and inedible offal, contents of the stomach, sludges from washing and cleaning, and the remains of meat defined as waste O2. According to the BMP test, mixtures of fresh inoculum (38 g), waste O1 and waste O2 in quantities of 1 g and 2 g have been tested, and the model for the selection of the best mix in terms of the biogas yield has been defined. Based on correlations of CH4 and COD, mixture M1 (O1 : O2 = 80 : 20) is recommended, for treatment at the plant, because it has the highest yield of 256.16 mL CH4 per unit value of COD