TY - JOUR
T1 - Enhanced methanogenic degradation of cellulose-containing sewage via fungi-methanogens syntrophic association in an anaerobic membrane bioreactor
AU - Chen, Rong
AU - Nie, Yulun
AU - Tanaka, Nobuyuki
AU - Niu, Qigui
AU - Li, Qian
AU - Li, Yu You
N1 - Funding Information:
This work was supported by the KAKENHI Grant-in-Aid for Scientific Research (No. 26289179 ), JSPS (Japan Society for the Promotion of Science) KAKENHI Grant-in-Aid for JSPS Fellows (No. 15F15353 ) and the Shaanxi Program for Innovative Research Team (No. 2013KCT-13 ).
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017
Y1 - 2017
N2 - An anaerobic membrane bioreactor was configured for methanogenic degradation of cellulose-containing sewage. The degradation performance and microbial changes were evaluated under five hydraulic retention times (HRTs). The results indicated the methane production was largely enhanced with 92.6% efficiency of chemical oxygen demand (COD) converting to methane and 80% proportion of methane in produced biogas, meanwhile the biomass yield presented the fewest at the shortest HRT 8 h. Enhanced methane production with decreased biomass yield was attributed to an association between fungi and methanogens. Microbial analysis showed fungi Basidiomycota and methanogen Methanoregula apparently established the association, especially Basidiomycota reaching 93% relative abundance at HRT 8 h. Specific methanogenic activity (SMA) and biochemical methane potential (BMP) tests suggested the association was derived from H2 production by fungi and H2 consumption by methanogens, during the process of cellulose degradation. The methanogenic degradation of cellulose-containing sewage was markedly promoted via the fungi-methanogens syntrophic association.
AB - An anaerobic membrane bioreactor was configured for methanogenic degradation of cellulose-containing sewage. The degradation performance and microbial changes were evaluated under five hydraulic retention times (HRTs). The results indicated the methane production was largely enhanced with 92.6% efficiency of chemical oxygen demand (COD) converting to methane and 80% proportion of methane in produced biogas, meanwhile the biomass yield presented the fewest at the shortest HRT 8 h. Enhanced methane production with decreased biomass yield was attributed to an association between fungi and methanogens. Microbial analysis showed fungi Basidiomycota and methanogen Methanoregula apparently established the association, especially Basidiomycota reaching 93% relative abundance at HRT 8 h. Specific methanogenic activity (SMA) and biochemical methane potential (BMP) tests suggested the association was derived from H2 production by fungi and H2 consumption by methanogens, during the process of cellulose degradation. The methanogenic degradation of cellulose-containing sewage was markedly promoted via the fungi-methanogens syntrophic association.
KW - Anaerobic membrane bioreactor
KW - Cellulose-containing sewage
KW - Fungi-methanogens association
KW - Methanogenic degradation
KW - Microbial analysis
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U2 - 10.1016/j.biortech.2017.09.046
DO - 10.1016/j.biortech.2017.09.046
M3 - Article
C2 - 28926913
AN - SCOPUS:85029390368
SN - 0960-8524
VL - 245
SP - 810
EP - 818
JO - Bioresource Technology
JF - Bioresource Technology
ER -
