[1]赵红梅,仇潇洒,薛晓燕,等.优化后反硝化系统在高NO-2及NO-3环境下脱氮及N2O释放特征[J].西安建筑科技大学学报(自然科学版),2020,52(03):455-462.[doi:10.15986/j.1006-7930.2020.03.021]
 ZHAO Hongmei,QIU Xiaosa,XUE Xiaoyan,et al.Characteristics of denitrification and N2O production under high NO-2 and NO-3 environments in an optimized denitrification system[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(03):455-462.[doi:10.15986/j.1006-7930.2020.03.021]
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优化后反硝化系统在高NO-2及NO-3环境下脱氮及N2O释放特征()
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西安建筑科技大学学报(自然科学版)[ISSN:1006-7930/CN:61-1295/TU]

卷:
52
期数:
2020年03期
页码:
455-462
栏目:
出版日期:
2020-06-30

文章信息/Info

Title:
Characteristics of denitrification and N2O production under high NO-2 and NO-3 environments in an optimized denitrification system
文章编号:
1006-7930(2020)03-0455-08
作者:
赵红梅12仇潇洒12薛晓燕23 张莉平12
(1.长安大学 建筑工程学院,陕西 西安 710061; 2.住房与城乡建设部 给水排水重点实验室,陕西 西安710061; 3.长安大学 环境科学与工程学院,陕西 西安710054; )
Author(s):
ZHAO Hongmei12QIU Xiaosa12XUE Xiaoyan23ZHANG Liping12
(1.School of Civil Engineering, Chang ’an University, Xi’an 710061,China; 2.Department of housing and urban-rural development water supply and drainage key laboratory, Xi’an 710061, China; 3.School of Environmental Science and Engineering, Chang’an University, Xi’an 710054, China)
关键词:
反硝化 陶厄氏菌 C/N 亚硝酸氮 硝酸氮 N2O
Keywords:
denitrification Thauera C/N nitrite nitrogen nitrogen nitrate N2O
分类号:
TU411
DOI:
10.15986/j.1006-7930.2020.03.021
文献标志码:
A
摘要:
为揭示优化后的缺氧反硝化系统在处理高NO-2和NO-3废水时的脱氮效果和N2O产生情况,采用序批式活性污泥反应器(SBR),研究优化后的污泥系统在初始NO-2-N浓度为300 mg/L和400 mg/L时,不同进水C/N条件下反硝化过程脱氮和N2O产生情况,同时对比初始浓度为500 mg/L、C/N为2时,不同电子受体情况下N2O的产生情况.研究结果表明:反硝化污泥系统优化后,反硝化速率提升了1.29倍,脱氮性能逐渐增强,N2O累计逸出量降低了100倍,污泥系统中的脱氮优势菌群为陶厄氏菌属(Thauera),所占比例从23.5%增加到76.4%; 初始NO-2-N浓度为300 mg/L和400 mg/L时,不同进水条件下,系统均可表现出较强的反硝化能力,反硝化过程中N2O最大转化率仅为0.104%; 初始浓度提高到500 mg/L,C/N为2,以NO-3-N为电子受体时,反应过程NO-2-N最大积累量仅为22.46 mg/L,溶解态N2O始终维持在0.304 mg/L左右,而以NO-2-N为电子受体时,溶解态N2O峰值达到0.765 mg/L,但N2O最大转化率仅为0.066%; 反硝化污泥系统优化后,对高硝氮废水可表现出较强的反硝化能力,同时反硝化过程N2O的产量较低.
Abstract:
To reveal the denitrification effect and N2O production of the optimized anoxic denitrification system in the treatment of high NO-2and NO-3 wastewater,a sequencing batch activated sludge reactor was used to study the production of N2O in the optimized denitrification process under different C/N ratio when the initial NO-2-N concentrations were 300 mg/L and 400 mg/L.Simultaneously, when the initial concentration was 500mg/L and C/N was 2, the production of N2O under different electron acceptors was compared.Results show that after the denitrification sludge system was optimized, the denitrification rate increased by 1.29 times and the denitrification performance was gradually enhanced.Meanwhile,the accumulated N2O emission was reduced 100 times.The proportion of Thauera increased from 23.5% to 76.4%, becoming the major microbial community in the denitrifying system.When the initial concentration of NO-2-N was 300 mg/L and 400 mg/L, the system can show strong denitrification ability under different influent conditions.The maximum conversion rate of N2O was only 0.104%.The C/N was 2 and initial concentration increased to 500 mg/L, the maximum accumulation of NO-2-N was only 22.4 mg/L and the dissolved N2O was maintained at about 0.304mg/L when the NO-3-N was an electron acceptor.When the NO-2-N was an electron acceptor, the dissolved N2O peak value reaches 0.765 mg/L but the conversion rate of N2O is only 0.066%.After the denitrification sludge system was optimized, it can show stronger denitrification ability for high nitrate nitrogen wastewater, and it can reduce the amount of N2O produced in denitrification process.

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备注/Memo

备注/Memo:
收稿日期:2019-11-21 修改稿日期:2020-05-12
基金项目:陕西省自然科学基础研究计划(2020JM-264)
第一作者:仇潇洒(1994-),女,硕士,主要从事污水处理与资源化研究.E-mail:1139535101@qq.com
更新日期/Last Update: 2020-07-30