不同碳源对反硝化SBR反应器N_(2)O释放的影响  

EFFECT OF DIFFERENT CARBON SOURCES ON N_(2)O RELEASE IN DENITRIFICATION PROCESS OF A SBR REACTOR

作　　者：付昆明[1] 傅思博 刘凡奇 仇付国[1] 曹秀芹[1] FU Kun-ming;FU Si-bo;LIU Fan-qi;QIU Fu-guo;CAO Xiu-qin(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)

机构地区：[1]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

出　　处：《环境工程》2021年第9期56-62,共7页Environmental Engineering

基　　金：北京建筑大学市属高校基本科研业务费专项(X18214)。

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N_(2)O释放过程进行研究。结果表明:4种碳源条件下,N_(2)O积累量均呈先升高后降低最后保持稳定的趋势。N_(2)O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%。N_(2)O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N_(2)O释放的因素。N_(2)O is a potent greenhouse gas,and releases a lot in wastewater treatment.Understanding the influencing factors of N_(2)O release in wastewater treatment can reduce N_(2)O emissions.Four classical external organic carbon sources,such as sodium acetate,ethanol,glucose and sucrose,were used to study the N_(2)O release process in denitrification process with SBR reactors.The results showed that under the 4 carbon source conditions,the accumulation of N_(2)O showed a trend of first increasing,then decreasing,and finally remaining stable.The maximum accumulation of N_(2)O 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 N_(2)O 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 N_(2)O 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 N_(2)O release.

关 键 词：外加碳源 氧化亚氮 反硝化 游离亚硝酸 序批式活性污泥法 

分 类 号：X703[环境科学与工程—环境工程]