Bolivia faces an energy crisis due to its high dependence on natural gas. Since soybeans account for 40% of the cultivated area, their hulls could be used for biogas production. In this sense, this study estimated their potential through bibliographic analysis and Buswell’s method, obtaining a BMP of 892 mL/g VS with 43.05% methane content. Calculations show that 3.38 kg of SH generates the equivalent of 1 m3 of natural gas, with a potential production of 76 billion m3 of biogas in 2023, covering 16.36% of residential consumption. However, it was determined that pyrolysis generates 26.53% more energy than biogas. The low degradability in mono-digestion suggests that co-digestion with carbon-rich substrates and pretreatments could improve its efficiency.

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Assessment of the Energy Potential of Anaerobic Digestion of Soybean Hulls in Bolivia

  • Paola C. Lopez-Soria,
  • Santiago Peña-Antelo,
  • Agatha C. da Silva-Ovando,
  • Pablo M. Pérez-García,
  • Daniel F. Sempértegui-Tapia

摘要

Bolivia faces an energy crisis due to its high dependence on natural gas. Since soybeans account for 40% of the cultivated area, their hulls could be used for biogas production. In this sense, this study estimated their potential through bibliographic analysis and Buswell’s method, obtaining a BMP of 892 mL/g VS with 43.05% methane content. Calculations show that 3.38 kg of SH generates the equivalent of 1 m3 of natural gas, with a potential production of 76 billion m3 of biogas in 2023, covering 16.36% of residential consumption. However, it was determined that pyrolysis generates 26.53% more energy than biogas. The low degradability in mono-digestion suggests that co-digestion with carbon-rich substrates and pretreatments could improve its efficiency.