Enhanced methanogenic degradation of cellulose-containing sewage via fungi-methanogens syntrophic association in an anaerobic membrane bioreactor

Rong Chen, Yulun Nie, Nobuyuki Tanaka, Qigui Niu, Qian Li, Yu You Li

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)810-818
Number of pages9
JournalBioresource Technology
Volume245
DOIs
Publication statusPublished - 2017

Keywords

  • Anaerobic membrane bioreactor
  • Cellulose-containing sewage
  • Fungi-methanogens association
  • Methanogenic degradation
  • Microbial analysis

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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