Analysis of the Changing Microbial Phase in an Underground River Anaerobic Digestion Reactor

The underground river anaerobic fermentation system was adopted in this experiment was that a pipeline buried underground just like an underground river. The hydrolysis, acidification and degradation of initial fermentation were carried out when raw materials were put into the buffer zone from the entrance of "underground river", and flowing slowly into the main fermentation processing areas under the action of gravity. The observation of changing microbial phases and succession of anaerobic digestion process were based an underground river anaerobic digestion reactor. The results showed with that the anaerobic digestion process, the types of microbial flora reduced gradually. The decomposition dominant cocci primary evolved gradually to primary brevibacterium flora of methane-producing bacteria flora. The dominant bacteria flora of methane-producing bacteria flora in underground river were mainly consisted of the brevibacterium bacteria and a small amount of the filamentous bacteria. The underground river anaerobic digestion reactor devices can be used to create favorable conditions for the formation of bacteria and stability at the various stages in order to achieve continuous and efficient production of methane.