Effect of ammonia inhibition on microbial community dynamic and process functional resilience in mesophilic methane fermentation of chicken manure

Qigui Niu, Kengo Kubota, Wei Qiao, Zhaoqian Jing, Yanlong Zhang, Li Yu-You

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

BACKGROUND: Ammonia nitrogen affects the methane fermentation of chicken manure, both the process resilience and the functional microbial community dynamics. In this study, a mesophilic continuous stirred-tank reactor (CSTR) was investigated with total ammonia nitrogen (TAN) varied from 2000 mg L-1 to 16000 mg L-1. RESULTS: 16S-rDNA cloning and TRFLP results revealed that the microbial community shifts significantly responding to TAN. Aceticlastic Methanosarcina acetivorans increased gradually from 17% in the steady stage to 72% in the recovered stage with high resistance compared with aceticlastic Methanosaeta, which almost disappeared at high TAN. In contrast, hydrogenotrophic Methanoculleus increased from 2% in the steady stage to 30% in the inhibited stage and decreased to 13% in the recovered stage. The abundances of the dominant Firmicutes were 74% and 92%, with and without inhibition, and 58% in the recovered stage. Bacteroidetes decreased from 17% in the steady stage to 4% in the inhibited stage and thrived to 31% in the recovered stage. CONCLUSION: Process resilience was proven even after serious inhibition. Recoverable shifted archaeal and chaotic shifted bacterial communities with functional stability were observed. This result reveals that TAN has an obvious effect on microbial community shifts and the functional resilience of the process.

Original languageEnglish
Pages (from-to)2161-2169
Number of pages9
JournalJournal of Chemical Technology and Biotechnology
Volume90
Issue number12
DOIs
Publication statusPublished - 2015 Dec

Keywords

  • Ammonia inhibition
  • Chicken manure
  • Functional resilience
  • Mesophilic methane fermentation
  • Microbial community shift

ASJC Scopus subject areas

  • Biotechnology
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Waste Management and Disposal
  • Pollution
  • Organic Chemistry
  • Inorganic Chemistry

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