Microorganisms
Involved
in
Anerobic
Sludge
Digestion - Various physiological groups of bacteria occur in anaerobic sludge digestion tank. Although fungi and protozoa have been found, they occur in very low number. The digestion process itself is believed to be carried out by bacteria.
There are three different groups of bacteria occurring in this process: hydrolytic, fermentative and methanogenic bacteria. However, there is some overlap between the members of the first two groups.
Among the non-methanogens Bacillus, Pseudomonas, Lactobacillus, Spirillum, Vibrio, Klebsiella, Alcaligens and Micrococcus are the facultative anaerobes and Clostridium and Bacteroides are the obligate anaerobes. Methanogens include Methanobacterium, Methanococcus, Methanosarcina, Methanospirillum and Methanomicrobium.
