不同碳源对反硝化SBR反应器N<sub>2</sub>O释放的影响

付昆明; 傅思博; 刘凡奇; 仇付国; 曹秀芹

doi:10.13205/j.hjgc.202109009

不同碳源对反硝化SBR反应器N₂O释放的影响

doi: 10.13205/j.hjgc.202109009

北京建筑大学城市雨水系统与水环境教育部重点实验室中-荷污水处理技术研发中心, 北京 100044

基金项目:

北京建筑大学市属高校基本科研业务费专项（X18214）。

详细信息

作者简介:
付昆明(1981-),男,博士,副教授,主要研究方向为污水自养脱氮技术、N2O释放控制技术及农村污水治理技术。fukunming@163.com

通讯作者:
付昆明(1981-),男,博士,副教授,主要研究方向为污水自养脱氮技术、N₂O释放控制技术及农村污水治理技术。fukunming@163.com

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出版历程
- 收稿日期: 2020-10-11
- 网络出版日期: 2022-01-21

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

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

摘要

摘要: 试验使用SBR反应器，采用乙酸钠、乙醇、葡萄糖和蔗糖4种常用的外加有机碳源，对反硝化反应中N₂O释放过程进行研究。结果表明：4种碳源条件下，N₂O积累量均呈先升高后降低最后保持稳定的趋势。N₂O最大积累量分别为1.59，1.25，5.43，0.66 mg/L，最大转化率分别为1.61%、1.36%、5.44%和0.67%；最终积累量分别为1.02，0.67，3.12，0.49 mg/L，最终转化率分别为1.04%、0.73%、3.13%和0.50%。N₂O释放量及转化率顺序均为葡萄糖>乙酸钠>乙醇>蔗糖。游离亚硝酸抑制、不同反硝化酶的电子竞争和微生物群落结构差异均是影响N₂O释放的因素。
- 外加碳源 /
- 氧化亚氮 /
- 反硝化 /
- 游离亚硝酸 /
- 序批式活性污泥法
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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