What is the primary function of Methane in digester gas?

The primary function of methane in digester gas is to serve as a heating fuel. In wastewater treatment, particularly during anaerobic digestion, organic materials are broken down by microorganisms, producing biogas, which is primarily composed of methane and carbon dioxide. Methane, being a combustible fuel, can be used for generating heat or electricity, making it a valuable resource in the context of energy recovery from wastewater treatment processes.

While methane can play a role in reducing energy costs in the treatment facility, it does not oxidize organic material, neutralize odors, or directly enhance microbial activity. Instead, its production is a byproduct of the very microbial activity taking place during the anaerobic digestion process. Therefore, its primary function is effectively harnessed as a renewable energy source.