Biogas production in anaerobic digestion is a biological process where organic matter is broken down by microorganisms in the absence of oxygen, producing biogas and a stabilized sludge. Biogas is a mixture of gases, primarily methane (CH4) and carbon dioxide (CO2), with trace amounts of other gases such as hydrogen sulfide (H2S). The anaerobic digestion process occurs in four main stages: hydrolysis, acidogenesis, acetogenesis, and methanogenesis. Hydrolysis is the first stage, where complex organic molecules, such as carbohydrates, proteins, and lipids, are broken down into simpler soluble molecules, such as sugars, amino acids, and fatty acids, by hydrolytic bacteria. Acidogenesis is the second stage, where acidogenic bacteria convert the products of hydrolysis into volatile fatty acids (VFAs), such as acetic acid, propionic acid, and butyric acid, as well as other co....
Log in to view the answer
