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Updated: Aug 1, 2025

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors
Published on: December 6, 2018
Effect of COD/ NO3 --N ratio on nitrite accumulation and microbial behavior in glucose-driven partial denitrification
Zhijie Zeng1, Yiying Wang2, Wenxuan Zhu1
1College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
Abstract:
COD/NO3 --N ratio was considered to be one of the key factors achieving effective nitrite accumulation during partial denitrification. In two parallel reactors incubated with glucose as carbon source at COD/NO3 --N of 3 and 5, respectively, the microbial community structure shift and the nitrite accumulation performance during long-term operation were investigated. The maximum nitrite accumulation ratios at COD/NO3 --N of 3 and 5 were 17.9% and 47.04%, respectively. Thauera was the dominant genus in both reactors on day 220 with the relative abundance of 18.67% and 64.01%, respectively. Batch experiments with different electron acceptors suggested that the distinction in nitrite accumulation at COD/NO3 --N of 3 and 5 might be caused by the differences in the abundance of Thauera.
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