Anaerobic digestion is a biochemical process in which particular strains of bacteria digest biomass in an oxygen-
free environment under suitable temperature and humidity environments [4] [6]. The fermentation process
leads to the breakdown of complex biodegradable organics in a three-phase process: Hydrolysis, Acidogenesis,
and Methanogenesis [17]-[23] (see Figure 1). In Hydrolysis phase, exoenzymes (hydrolase) bacteria decompose-
complex organic molecules (fats, cellulose, starch,) in waste into simple sugars, amino acids, and fatty acids.
During Acidogensis phase, shorter carbon chains of volatile fatty acids (lactic, propionic, and valeric acids)
are created by acidogenic bacteria, which are then digested by acetogenic (homoacetogenic) microorganisms to
produce acetic acid, carbon dioxide, and hydrogen. In the final phase, Methanogenesis, the methanogenic bacteria
produce methane (biogas) from acetic acid, hydrogen and carbon dioxide, which typically contains 40% - 60%
methane and 30% - 40% carbon dioxide.