Anaerobic Digestion (AD) is a series of biological processes by which microorganisms break down biodegradable material in the absence of oxygen the end product of which is biogas. The process occurs naturally in swamps and bogs and also takes place in landfill sites. AD is a 4-stage process: hydrolysis, acidification, acetogenesis & methanogenesis. These are … Continue reading Anaerobic Digestion