Details

Autor(en) / Beteiligte

• Lee, Yun-Yeong
• Choi, Hyungjoo
• Cho, Kyung-Suk

Titel

Effects of carbon source, C/N ratio, nitrate, temperature, and pH on N2O emission and functional denitrifying genes during heterotrophic denitrification

Ist Teil von

• Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 2019-01, Vol.54 (1), p.16-29

Ort / Verlag

Philadelphia: Taylor & Francis

Erscheinungsjahr

2019

Quelle

Taylor & Francis Journals

Beschreibungen/Notizen

• The effects of operational parameters such as carbon source, C/N ratio, initial nitrate concentration, temperature, and pH value on heterotrophic denitrification and functional denitrifying genes were evaluated. When methanol was used as the sole carbon source, complete denitrification was performed in a short time without nitrous oxide (N 2 O) emission. Complete denitrification was performed at high C/N ratios (5.14 and 12.85) and low initial nitrate concentrations (75.9 and 151.6 mg N L −1 ). The denitrification rate was not temperature-sensitive in the range of 25-35 °C, but tended to decrease at a low pH of 5-6. The relationships between N 2 O emission and functional genes under various operational conditions were investigated by Pearson correlation and association network analyses. The C/N ratio was a key factor for N 2 O emission during the heterotrophic denitrification process. This information on the denitrification performance and its association with functional gene dynamics under various operational conditions is useful for N 2 O mitigation strategies for wastewater treatment processes.