What is the mesophilic temperature range used in anaerobic digestion?

The mesophilic temperature range used in anaerobic digestion is typically between 32-38°C (90-100°F). This temperature range is particularly favorable for the growth of mesophilic bacteria, which are crucial for the anaerobic digestion process. At these temperatures, the microbial activity is optimal, leading to effective decomposition of organic matter and production of biogas.

Anaerobic digestion relies on a stable temperature profile to maintain the activity of these bacteria. Within the mesophilic range, these microorganisms metabolize substrates more efficiently and sustain the delicate balance needed to ensure that the digestion process continues smoothly. This balance is crucial for optimizing biogas production and minimizing the formation of excess solids or undesirable byproducts.

The other ranges provided in the options either fall outside the mesophilic category or are associated with different microbial activity. For example, the thermophilic range, which operates at higher temperatures, promotes the activity of thermophilic bacteria but can lead to process instability if not managed correctly.