EFFECT OF DIFFERENT CARBON SOURCES ON N<sub>2</sub>O RELEASE IN DENITRIFICATION PROCESS OF A SBR REACTOR

FU Kun-ming; FU Si-bo; LIU Fan-qi; QIU Fu-guo; CAO Xiu-qin

doi:10.13205/j.hjgc.202109009

Volume 39 Issue 9

Jan. 2022

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FU Kun-ming, FU Si-bo, LIU Fan-qi, QIU Fu-guo, CAO Xiu-qin. EFFECT OF DIFFERENT CARBON SOURCES ON N₂O RELEASE IN DENITRIFICATION PROCESS OF A SBR REACTOR[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(9): 56-62. doi: 10.13205/j.hjgc.202109009

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EFFECT OF DIFFERENT CARBON SOURCES ON N₂O RELEASE IN DENITRIFICATION PROCESS OF A SBR REACTOR

doi: 10.13205/j.hjgc.202109009

Sino-Dutch R&D Center for Future Wastewater Treatment Technologies, Key Laboratory of Urban Storm Water System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

Received Date: 2020-10-11
Available Online: 2022-01-21

Abstract

Abstract

N₂O is a potent greenhouse gas, and releases a lot in wastewater treatment. Understanding the influencing factors of N₂O release in wastewater treatment can reduce N₂O emissions. Four classical external organic carbon sources, such as sodium acetate, ethanol, glucose and sucrose, were used to study the N₂O release process in denitrification process with SBR reactors. The results showed that under the 4 carbon source conditions, the accumulation of N₂O showed a trend of first increasing, then decreasing, and finally remaining stable. The maximum accumulation of N₂O were 1.59, 1.25, 5.43, 0.66 mg/L, and the maximum conversion rates were 1.61%, 1.36%, 5.44% and 0.67%, respectively. The final accumulation of N₂O were 1.02, 0.67, 3.12, 0.49 mg/L, and the final conversion rates were 1.04%, 0.73%, 3.13% and 0.50%, respectively. The N₂O release amount and conversion rate in descending order were glucose, sodium acetate, ethanol and sucrose. FNA inhibition, electronic competition of different denitrifying enzymes and differences in microbial community structure were factors affecting N₂O release.
- external carbon source,
- nitrous oxide,
- denitrification,
- FNA,
- SBR

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References

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