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

Title
Effects of carbon source, C/N ratio, nitrate, temperature, and pH on N2O emission and functional denitrifying genes during heterotrophic denitrification
Authors
Lee, Yun-YeongChoi, HyungjooCho, Kyung-Suk
Ewha Authors
조경숙
SCOPUS Author ID
조경숙scopus
Issue Date
2019
Journal Title
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
ISSN
1093-4529JCR Link

1532-4117JCR Link
Citation
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING vol. 54, no. 1, pp. 16 - 29
Keywords
Heterotrophic denitrificationfunctional genesnitrous oxideCN ratiooperational parameters
Publisher
TAYLOR &

FRANCIS INC
Indexed
SCI; SCIE; SCOPUS WOS
Document Type
Article
Abstract
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 (N2O) 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 degrees C, but tended to decrease at a low pH of 5-6. The relationships between N2O 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 N2O 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 N2O mitigation strategies for wastewater treatment processes.
DOI
10.1080/10934529.2018.1503903
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엘텍공과대학 > 환경공학전공 > Journal papers
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