Browsing by Author "Popayan Copete, Paul Alejandro"
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Item Comparación de dos instrumentos de medición de presión de biogás con aplicación en ensayos de potencial bioquímico de metano (PBM) en digestión anaerobia de residuos de alimentos(Universidad Santiago de Cali, 2024) Popayan Copete, Paul Alejandro; Sanchez Bustos, Mayra Alejandra; Pérez Vidal, AndreaAnaerobic digestion (AD) is a biological process in which bacteria decompose organic matter without oxygen, generating biogas, a renewable and versatile source of energy. Biochemical Methane Potential (BMP) assays measure the amount of methane (CH4) produced per gram of volatile solids (VS) in a substrate under controlled conditions, assessing the feasibility of obtaining energy from the anaerobic degradation of various wastes. In this work, the feasibility of obtaining energy was evaluated by BMP assays in AD with food residues, using a substrate/inoculum (S/I) ratio of 0,25 g VS substrate/g VS inoculum. Two types of anaerobic digestion (wet and dry), three headspace percentages (20%, 50%, 75%) and two biogas measuring instruments (pressure gauge and pressure sensor) were investigated. The results showed significant changes in biogas production according to the type of digestion, achieving a higher volume of CH4 with dry digestion due to the organic load in the reactors. It was observed that the treatment with the lowest headspace (20%) obtained a lower BMP value and with 50% the most favorable results were achieved in the BMP such as avoiding biogas dissolution. In relation to biogas measuring instruments, it was found that with the use of a pressure gauge, biogas losses are generated with each punch to the reactor, underestimating the BMP calculation between 16%-35% in DD and 12%-46% in WD. On the contrary, with the pressure sensor, it was easier to obtain data without interventions in the reactor, obtaining higher values in the production of biogas. The most beneficial treatment was measured through the pressure sensor with a 50% headspace and dry digestion, generating a BMP value of 187.21 (ml/grSV).