Abstract:
:This study was demonstrated with a coculture fermentation system using sugar beet pulp (SBP) as a carbon source combining the cellulose-degrading bacterium Clostridium cellulovorans with microbial flora of methane production (MFMP) for the direct conversion of cellulosic biomass to methane (CH4). The MFMP was taken from a commercial methane fermentation plant and extremely complicated. Therefore, the MFMP was analyzed by a next-generation sequencing system and the microbiome was identified and classified based on several computer programs. As a result, Methanosarcina mazei (1.34% of total counts) and the other methanogens were found in the MFMP. Interestingly, the simultaneous utilization of hydrogen (H2) and carbon dioxide (CO2) for methanogenesis was observed in the coculture with Consortium of C. cellulovorans with the MFMP (CCeM) including M. mazei. Furthermore, the CCeM degraded 87.3% of SBP without any pretreatment and produced 34.0 L of CH4 per 1 kg of dry weight of SBP. Thus, a gas metabolic shift in the fermentation pattern of C. cellulovorans was observed in the CCeM coculture. These results indicated that degradation of agricultural wastes was able to be carried out simultaneously with CH4 production by C. cellulovorans and the MFMP.
journal_name
AMB Expressjournal_title
AMB Expressauthors
Tomita H,Okazaki F,Tamaru Ydoi
10.1186/s13568-019-0752-2subject
Has Abstractpub_date
2019-02-18 00:00:00pages
28issue
1issn
2191-0855pii
10.1186/s13568-019-0752-2journal_volume
9pub_type
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