👉 Acid biology, or acidogenesis, is a crucial stage in anaerobic digestion where organic matter is broken down by microorganisms into simpler compounds, primarily volatile fatty acids (VFAs) and hydrogen gas (H₂). These VFAs, including acetate, propionate, and butyrate, are the end products of acidogenic bacteria that ferment complex organic substrates like carbohydrates, proteins, and lipids. The process occurs under anaerobic conditions and is characterized by a drop in pH due to the accumulation of these acids and hydrogen ions. This acidic environment can be detrimental to many microorganisms, but it also creates a selective pressure that favors acid-tolerant species, which are essential for maintaining the efficiency of the anaerobic digestion process. Proper management of pH levels is critical to prevent acidification and ensure optimal microbial activity throughout the digestion process.
