The effect of introduction of chicken manure on the biodiversity and performance of an anaerobic digester
Electron. j. biotechnol
;
37: 25-33, Jan. 2019. tab, graf, ilus
Artigo
em Inglês
| LILACS
| ID: biblio-1051225
ABSTRACT
Background:
Ammonium stress is a prime limiting phenomenon that occurs during methane formation from poultry manure. It is caused by elevated ammonium nitrogen concentrations that result from substrate decomposition. The amounts of methane formed depend on the activity of methanogenic microbes.Results:
During the research reported in this paper, the response of a mesophilic consortium inhabiting a biogas reactor to rising load of poultry manure was investigated. The taxonomic composition of bacterial population was mostly typical, however syntrophic bacteria were not detected. This absence resulted in limitation of succession of some methanogenic microorganisms, especially obligate hydrogenotrophs. The methanogenic activity of the consortium was totally dependent on the activity of Methanosaeta. Inhibition of methanoganesis was noticed at ammonium nitrogen concentration of 3.68 g/L, total cessation occurred at 5.45 g/L. Significant amounts of acetic acid in the fermentation pulp accompanied the inhibition.Conclusions:
The effectiveness of the consortium was totally dependent on the metabolic activity of the acetoclastic Methanoseata genus and lack of SAOB did not allow hydrogenotrophic methanogens to propagate and lead to cessation of biogas production at an elevated ammonium concentration at which acetoclastic methanogens were inhibited.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Methanosarcinaceae
/
Biocombustíveis
/
Microbiota
/
Anaerobiose
Idioma:
Inglês
Revista:
Electron. j. biotechnol
Assunto da revista:
Biotecnologia
Ano de publicação:
2019
Tipo de documento:
Artigo
País de afiliação:
Polônia
Instituição/País de afiliação:
Institute of Microbial Technologies/PL
/
Poznan University of Life Sciences/PL
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