Characterization of methanogenesis, acidogenesis and hydrolysis in thermophilic methane fermentation of chicken manure

Qigui Niu, Toshimasa Hojo, Wei Qiao, Hong Qiang, Yu You Li

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

The thermophilic methane fermentation of chicken manure (CM) with a total solids (TS) of approximately 10% was investigated with regard to ammonia inhibition. A gradual increase in total ammonia nitrogen to 6000mg/L was observed in the case of raw CM fermentation. A distinct rise in VFA accumulation combined with a low methane production of 0.29L/gVS occurred at a TAN of 4000~5000mg/L. Biogas production completely ceased when TAN reached 8000mg/L after the addition of NH4HCO3. The high sensitivity of methanogenesis to TAN and free ammonia (FA) was quantitatively confirmed. The IC50 of TAN for methanogenesis, acidogenesis and hydrolysis was 5058, 5305 and 5707mg/L at a pH value of 8.1±0.2. Similar results but with a lower IC50 were obtained for FA inhibition during fermentation. The microbial community analysis revealed significant differences in hydrogenotrophic methanogens and aceticlastic methanogens before and after inhibition.

Original languageEnglish
Pages (from-to)587-596
Number of pages10
JournalChemical Engineering Journal
Volume244
DOIs
Publication statusPublished - 2014 May 15

Keywords

  • Chicken manure
  • Methanogenesis
  • Microbial community
  • Thermophilic methane fermentation
  • Wide range of ammonia

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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