Denitrifying activity via nitrite and N 2O production using acetate and swine wastewater

M. Belmonte, J. R. Vázquez-Padín, M. Figueroa, J. L. Campos, R. Méndez, G. Vidal, A. Mosquera-Corral

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The presence of nitrite during denitrification is generally related to N 2O emissions. The aim of this work was to determine the operational conditions that have influences in the specific denitrifying activities (SDA) and N 2O production. Two factorial experimental designs (2 3 and 2 2) were performed to evaluate the effects of four operational variables (pH; biomass concentration; nitrite concentration and C/N ratio) on the SDA. Batch experiments were carried out with two different carbon sources: acetate and swine wastewater. Results showed that both biomass and NO 2 - concentrations had a significant effect on the SDA in the presence of acetate, in the case of swine slurry, pH also affected the SDA. N 2O production was only detected when swine wastewater was used and its specific production rate increased with the increase of the SDA. This result would indicate that N 2O emissions are also promoted when swine wastewater is treated in conditions that favor the SDA.

Original languageEnglish
Pages (from-to)1202-1206
Number of pages5
JournalProcess Biochemistry
Volume47
Issue number7
DOIs
StatePublished - Jul 2012
Externally publishedYes

Keywords

  • Acetate
  • Denitrifying activity
  • N O
  • Nitrite
  • Swine wastewater

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