Long-term responses to caproic acid in anaerobic digestion systems: Methanogenic enhancement, extracellular polymer dynamics and microbial metabolic remodeling.
Caproic acid (CA)-rich waste streams generated during chain elongation severely inhibit methanogenesis, posing a major challenge for anaerobic digestion (AD) systems. However, the long-term physicochemical and microbial adaptation processes that sustain methanogenesis under prolonged CA stress remain poorly understood....