期刊
ENVIRONMENTAL TECHNOLOGY
卷 43, 期 22, 页码 3355-3365出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2021.1921053
关键词
Groundwater; glucose concentration; biological denitrification; nitrate nitrogen; removal rate
资金
- Scientific Research Fund of Qingdao Geo-Engineering Surveying Institute
The study found that the addition of an external carbon source can improve the nitrate removal rate in groundwater during biological denitrification, with an optimal concentration observed at 2 g/L of glucose.
At present, groundwater nitrate pollution in China is serious. The use of microorganisms for biological denitrification has been widely applied, and it is a universal and efficient in situ groundwater remediation technique, but this approach is influenced by many factors. In this study, glucose was adopted as the carbon source, four different concentrations of 0, 2, 5 and 10 g/L were considered, and natural groundwater with a nitrate concentration of 300.8 mg/L was employed as the experimental solution. The effect of the carbon source concentration on the nitrate removal rate in groundwater was examined through heterotrophic anaerobic denitrification experiments. The results showed that the nitrate removal rate could be improved by the addition of an external carbon source in the process of biological denitrification, and an optimal concentration was observed. At a glucose concentration of 2 g/L, the denitrification effect was the best.
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