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<p>This study evaluated the feasibility of methane production under field conditions from the fraction of fruits and vegetables derived from domestic waste generated in a rural region of Veracruz, Mexico. The type and composition of the substrate, along with the selection of inoculum, are key parameters that determine biochemical methane production (BMP). Optimizing these conditions is essential for the efficient operation of an anaerobic digestion (AD) system. BMP tests were conducted in batch systems to evaluate the effect of adding exhausted algae biomass as a substrate and three different inocula: anaerobic digester liquor (ADL), sheep manure (SM), and anaerobic sludge (AS). Stoichiometric models based on elemental composition were used to analyze the data and predict methane yield. The results showed that using FVW as the substrate with the ADL inoculum positively influenced biogas production, achieving a methane yield of 0.44 L/g volatile solids (VS) and a VS removal efficiency of 80%. This methane yield corresponded to 73% of the maximum theoretical yield. The predominant methanogenic bacterial and archaeal communities in ADL, AS, and SM belonged to the <i>Methanobacteriaceae</i> and <i>Lactobacillaceae</i> families, respectively. A robust AD system operated under field conditions attained a maximal methane yield of 0.305 (L/g VS) and a VS removal of 75%. Additionally, calorific analysis demonstrated the feasibility of obtaining energy for combustion without the need for methane upgrading.</p>

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Effect of the inocula and startup process on the biogas production in a rural region using fruits and vegetables from domestic waste

  • 期刊论文

  • 发表日期：

    2025年3月24日

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  • Michel Canul-Chan,
  • Luis Angel Esteban-Bravo,
  • José Luis Arguello-Balderas,
  • Elvia Ines Garcia-Peña,
  • Eric Pascal Houbron

摘要

This study evaluated the feasibility of methane production under field conditions from the fraction of fruits and vegetables derived from domestic waste generated in a rural region of Veracruz, Mexico. The type and composition of the substrate, along with the selection of inoculum, are key parameters that determine biochemical methane production (BMP). Optimizing these conditions is essential for the efficient operation of an anaerobic digestion (AD) system. BMP tests were conducted in batch systems to evaluate the effect of adding exhausted algae biomass as a substrate and three different inocula: anaerobic digester liquor (ADL), sheep manure (SM), and anaerobic sludge (AS). Stoichiometric models based on elemental composition were used to analyze the data and predict methane yield. The results showed that using FVW as the substrate with the ADL inoculum positively influenced biogas production, achieving a methane yield of 0.44 L/g volatile solids (VS) and a VS removal efficiency of 80%. This methane yield corresponded to 73% of the maximum theoretical yield. The predominant methanogenic bacterial and archaeal communities in ADL, AS, and SM belonged to the Methanobacteriaceae and Lactobacillaceae families, respectively. A robust AD system operated under field conditions attained a maximal methane yield of 0.305 (L/g VS) and a VS removal of 75%. Additionally, calorific analysis demonstrated the feasibility of obtaining energy for combustion without the need for methane upgrading.