Abstract

Anaerobic digestion is a microbe-mediated process for producing biomethane, recovering energy, and assessing biodegradability of organic matter. Higher heating value of organic matter and biomethane are used for counting energy conversion efficiency. Anaerobic digestion is an energy conversion process that is tied to the parameters of Buswell’s equation. However, there is no study that attempts to integrate the parameters of Buswell’s equation with higher heating value to form a unified mathematical framework. This study introduces Buswell’s model as a theoretical parameter-derived approach, in which the mathematical framework is constructed by parameters of organic matter, parameters of Buswell’s equation, and higher heating value of organic matter. It is critically important that the theoretical higher heating value of any empirical formula or structural formula can be calculated by the derived mathematical equations.

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