The effect of introduction of chicken manure on the biodiversity and performance of an anaerobic digester
Electron. j. biotechnol
; Electron. j. biotechnol;37: 25-33, Jan. 2019. tab, graf, ilus
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| ID: biblio-1051225
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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.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
LILACS
Asunto principal:
Methanosarcinaceae
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Biocombustibles
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Microbiota
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Anaerobiosis
Idioma:
En
Revista:
Electron. j. biotechnol
Asunto de la revista:
BIOTECNOLOGIA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Polonia
Pais de publicación:
Chile