Study of the Activation Process of a 2 m3 Pilot Biodigester on a Microfarm Site  

作　　者：Jean-Baptiste Mansaly Djicknoum Diouf Bruno Pirou Elhadji Mba Bamdo Diakhaby Seynabou Lo Amadou Seidou Maïga Diène Ndiaye Jean-Baptiste Mansaly;Djicknoum Diouf;Bruno Pirou;Elhadji Mba Bamdo Diakhaby;Seynabou Lo;Amadou Seidou Maïga;Diène Ndiaye(Laboratoire Environnement Ingénierie Télécommunications et Energies Renouvelables, Université Gaston Berger de Saint-Louis, Saint-Louis, Sénégal;Centre de coopération Internationale en Recherche Agronomique pour le Développement, Montpellier, France;Laboratoire Régional de Saint Louis et UFR-2S, Université Gaston Berger, Saint Louis, Sénégal)

机构地区：[1]Laboratoire Environnement Ingénierie Télécommunications et Energies Renouvelables, Université Gaston Berger de Saint-Louis, Saint-Louis, Sénégal [2]Centre de coopération Internationale en Recherche Agronomique pour le Développement, Montpellier, France [3]Laboratoire Régional de Saint Louis et UFR-2S, Université Gaston Berger, Saint Louis, Sénégal

出　　处：《Journal of Agricultural Chemistry and Environment》2023年第4期397-413,共17页农业化学和环境（英文）

摘　　要：A domestic balloon-type digester with 1200 liters of substrate and a 700-litre gas reserve was installed at the Université Gaston Berger pilot farm, which has 4 cows. After an initial load of 1000 L of water, 90 L of bovine rumen and 145 L of cow dung, the functional parameters of the reaction medium, i.e., temperature, pH, salinity and conductimetry, were regularly monitored at a rate of 3 tests per day until the thirtieth day, corresponding to the flame test and the start of analysis and daily loading of the biodigester. The analysis of the biogas obtained after the flame test showed us the considerable contribution of bovine hindquarters to the CH4 fraction, which reached 72.2% from the start of the production phase. As anaerobic digestion is both a complex and multiparametric process, microbiological analysis revealed the presence of several strains of bacteria in the substrate used. Among the most abundant were Escherichia coli, Klebsiella spp, non-fermentative Gram-negative bacilli and Enterococcus sp. However, the bacterial strain that interests us most in anaerobic digestion is the non-fermentative Gram-negative family. We see the identification and temporal monitoring of these families of bacteria as a major step forward in the control of anaerobic fermentation processes in the Sahelian context and in Senegal in particular.A domestic balloon-type digester with 1200 liters of substrate and a 700-litre gas reserve was installed at the Université Gaston Berger pilot farm, which has 4 cows. After an initial load of 1000 L of water, 90 L of bovine rumen and 145 L of cow dung, the functional parameters of the reaction medium, i.e., temperature, pH, salinity and conductimetry, were regularly monitored at a rate of 3 tests per day until the thirtieth day, corresponding to the flame test and the start of analysis and daily loading of the biodigester. The analysis of the biogas obtained after the flame test showed us the considerable contribution of bovine hindquarters to the CH4 fraction, which reached 72.2% from the start of the production phase. As anaerobic digestion is both a complex and multiparametric process, microbiological analysis revealed the presence of several strains of bacteria in the substrate used. Among the most abundant were Escherichia coli, Klebsiella spp, non-fermentative Gram-negative bacilli and Enterococcus sp. However, the bacterial strain that interests us most in anaerobic digestion is the non-fermentative Gram-negative family. We see the identification and temporal monitoring of these families of bacteria as a major step forward in the control of anaerobic fermentation processes in the Sahelian context and in Senegal in particular.

关 键 词：Pilot Digester Activation Bovine Belly Conductimetry SALINITY Microbiology Analysis 

分 类 号：F42[经济管理—产业经济]