At what temperature are anaerobic digesters typically operated?

Anaerobic digesters are typically operated around 35 degrees Celsius, which is considered optimal for the microorganisms involved in the digestion process. This temperature range is generally classified as mesophilic, which favors the growth and activity of bacteria that break down organic material without the presence of oxygen. Maintaining this specific temperature helps ensure efficient biogas production and effective waste stabilization.

Working at this temperature allows microbial communities to thrive, leading to quicker breakdown of organic solids, enhancing the overall efficiency of the digestion process. Although the other temperature options can be related to different types of anaerobic digestion—such as thermophilic digestion at approximately 55-60 degrees Celsius—35 degrees Celsius is the widely accepted standard for most municipal anaerobic digester operations.