| 生物脱氮好氧阶段不同反应过程N2O产量 |
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| 引用本文： | 巩有奎, 苗志加, 彭永臻. 生物脱氮好氧阶段不同反应过程N2O产量[J]. 环境工程学报, 2016, 10(12): 6963-6968. doi: 10.12030/j.cjee.201505067 |
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| 作者姓名： | 巩有奎 苗志加 彭永臻 |
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| 作者单位： | 1. 石家庄铁路职业技术学院, 石家庄 050041; 2. 北京工业大学环境与能源工程学院, 北京 100022; 3. 河北地质大学水资源与环境学院, 石家庄 050031 |
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| 基金项目： | 国家自然科学基金资助项目（51008005） 河北省高等学校科学技术研究青年基金项目（QN2013172） |
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| 摘 要： | 在成功实现生活污水短程生物脱氮的基础上，采用体积为3 L的小试反应器，利用在线DO监测手段控制DO=1.0 mg·L-1，通过投加NaNO2的方式控制系统初始NO2--N=40 mg·L-1，以丙烯基硫脲（ATU）抑制NH4+-N的氧化过程，考察了生物脱氮好氧阶段不同反应过程中N2O的产生量。结果表明，除缺氧反硝化细菌的反硝化过程外，好氧条件下，氨氧化菌（AOB）能够以NH4+-N作为电子供体，NO2--N作为电子受体，进行反硝化脱氮过程，其反硝化产物为N2O。生物脱氮好氧阶段AOB的好氧反硝化和异养菌的缺氧反硝化反应中，N2O的产量分别占分别占进水总氮（NH4+-N+NO2--N）的7.23%和7.80%。好氧阶段NH4+-N和NO2-的氧化过程中，几乎没有N2O的产生。
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| 关 键 词： | N2O 硝化菌反硝化 缺氧反硝化 亚硝态氮 |
| 收稿时间： | 2015-06-30 |
Nitrous oxide production from sequencing batch reactor sludge under nitrifying conditions of different process |
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| GONG Youkui, MIAO Zhijia, PENG Yongzhen. Nitrous oxide production from sequencing batch reactor sludge under nitrifying conditions of different process[J]. Chinese Journal of Environmental Engineering, 2016, 10(12): 6963-6968. doi: 10.12030/j.cjee.201505067 |
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| Authors: | GONG Youkui MIAO Zhijia PENG Yongzhen |
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| Affiliation: | 1. Shijiazhuang Institute of Railway Technology, Shijiazhuang 050041, China; 2. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China; 3. School of Water Resources and Environment, Hebei Geological University, Shijiazhuang 050031, China |
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| Abstract: | Contributions of NH4+ oxidation,NO2- oxidation,and heterotrophic and nitrifier denitrification during the N-removal process were investigated in a lab-scale nitrifying reactor.Allylthiourea (ATU) was used to inhibit NH4+ oxidation and investigate processes under nitrifying conditions.The results confirmed that besides heterotrophic bacteria,ammonium-oxidizing bacteria (AOB) could undertake denitrification processes,with NH4+ as the electron donor,NO2- as the electron acceptor,and N2O as one of the final products.The relative contribution of the heterotrophic and nitrifier denitrification to total N2O emission was 51% and 47%,respectively.Little N2O was emitted during the NH4+ and NO2- oxidation processes. |
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| Keywords: | N2O denitrification of nitrification bacteria anoxic denitrification nitrite nitrogen |
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