Simultaneous biogas and biogas slurry production from co-digestion of pig manure and corn straw: Performance optimization and microbial community shift

Jing Ning, Mingdian Zhou, Xiaofang Pan, Chunxing Li, Nan Lv, Tao Wang, Guanjing Cai, Ruming Wang, Junjie Li, Gefu Zhu*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Anaerobic co-digestion (AcoD) is proved as an effective approach to solving a bottleneck problem of the low biogas yield in agricultural biomass waste treatment with anaerobic digestion (AD) technology. The present study investigated the effect of C/N radio, organic loading rate (OLR) and total solids (TS) contents on reactor performance in AcoD of pig manure and corn straw for simultaneous biogas and biogas slurry production. It was found that the highest biogas production was obtained at C/N ratio of 25, while the best biogas slurry performance was achieved at C/N ratio of 35. And high OLR and TS resulted in good performances in both biogas production and biogas slurry. At last, the microbial community analysis suggested that Bacteroidetes played a significant role in AcoD process. Acetoclastic methanogenesis was the main pathway for methane production in the stable system. And changing operational parameters could transform and shift the microbial community.

Original languageEnglish
JournalBioresource Technology
Volume282
Pages (from-to)37-47
ISSN0960-8524
DOIs
Publication statusPublished - 1 Jun 2019

Keywords

  • Agricultural biomass waste
  • Anaerobic co-digestion
  • Biogas
  • Biogas slurry
  • Microbial community shift

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