Theoretical framework for the estimation of H2S concentration in biogas produced from complex sulfur-rich substrates
2020
Moreno-Andrade, Iván | Moreno, Gloria | Quijano, Guillermo
A theoretical framework was developed and validated for the estimation of H₂S concentration in biogas produced from complex sulfur-rich effluents. The modeling approach was based on easy-to-obtain data such as biological biogas potential (BBP), chemical oxygen demand, and total sulfur content. Considering the few data required, the model fitted well the experimental H₂S concentrations obtained from BBP tests and continuous bioreactors reported in the literature. The model supported a correlation coefficient (R²) of 0.989 over the experimental data, obtaining average and maximum errors of ~ 25 and ~ 35%, respectively. The theoretical framework yielded good estimations for a wide range of experimental H₂S concentrations (0.2 to 4.5% in biogas). This modeling approach is, therefore, a useful tool towards anticipating the H₂S concentration in biogas produced from sulfur-rich substrates and deciding whether the installation of a desulfurization technology is required or not.
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