| 活性污泥厌氧Fe(Ⅲ)还原氨氧化现象初探 |
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| 引用本文： | 李祥,林兴,杨朋兵,黄勇,刘恒蔚.活性污泥厌氧Fe(Ⅲ)还原氨氧化现象初探[J].环境科学,2016,37(8):3114-3119. |
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| 作者姓名： | 李祥 林兴 杨朋兵 黄勇 刘恒蔚 |
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| 作者单位： | 苏州科技大学环境科学与工程学院, 苏州 215009;苏州科技大学环境生物技术研究所, 苏州 215009,苏州科技大学环境科学与工程学院, 苏州 215009;苏州科技大学环境生物技术研究所, 苏州 215009,苏州科技大学环境科学与工程学院, 苏州 215009;苏州科技大学环境生物技术研究所, 苏州 215009,苏州科技大学环境科学与工程学院, 苏州 215009;苏州科技大学环境生物技术研究所, 苏州 215009,苏州科技大学环境科学与工程学院, 苏州 215009;苏州科技大学环境生物技术研究所, 苏州 215009 |
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| 基金项目： | 国家自然科学基金项目（51478284，51408387）；江苏省研究生创新基金项目（CXLX14_1289）；江苏省特色优势学科二期立项项目；江苏省水处理技术与材料协同创新中心项目 |
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| 摘 要： | 采用常规化学分析和微生物群落变性梯度凝胶电泳(DGGE)监测技术,探究了厌氧条件下活性污泥中Fe(Ⅲ)还原氨氧化(Feammox)反应的存在及微生物群落动态响应.结果表明,当反应器运行至第24 d时NH_4~+发生转化,同时检测到NO_3~-和Fe(Ⅱ)的生成,表明活性污泥中存在着Fe(Ⅲ)还原NH_4~+氧化反应,产物主要为NO_3~-和Fe(Ⅱ),并伴随少量N_2生成.经过84d培养,氨氮最大转化量达29.85 mg·L~(-1),转化率为59.7%,出水NO_3~-最高值达24.56 mg·L~(-1).活性污泥中Feammox为产酸过程,体系中p H值下降.整个培养过程中微生物群落条带分布发生变化,参与活性污泥中Feammox反应的部分群落在培养过程获得保留,部分优势菌群获得富集.
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| 关 键 词： | 活性污泥 厌氧环境 Fe(Ⅲ)还原氨氧化 变性梯度凝胶电泳(DGGE) 微生物群落 |
| 收稿时间： | 2016/3/19 0:00:00 |
| 修稿时间： | 4/1/2016 12:00:00 AM |
Simultaneous Ferric Reduction with Ammonia Oxidation Phenomena in Activated Sludge in Anaerobic Environment |
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| LI Xiang,LIN Xing,YANG Peng-bing,HUANG Yong and LIU Heng-wei.Simultaneous Ferric Reduction with Ammonia Oxidation Phenomena in Activated Sludge in Anaerobic Environment[J].Chinese Journal of Environmental Science,2016,37(8):3114-3119. |
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| Authors: | LI Xiang LIN Xing YANG Peng-bing HUANG Yong and LIU Heng-wei |
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| Institution: | School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215009, China,School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215009, China,School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215009, China,School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215009, China and School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215009, China |
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| Abstract: | In recent years, a few phenomena of ferric reduction and ammonia oxidation (Feammox) have been discovered in Paddy soil, lake sediments and wetland soil, but none was observed in activated sludge. Thus, the Feammox process and the dynamic response of corresponding microbial community in activated sludge were explored by conventional chemical analyses and microbial community denatured gradient gel electrophoresis (DGGE) technique. After 24 d of operation, ammonia transformation occurred. Nitrate and ferrous ion were detected in the reactor, indicating the existence of Feammox process in activated sludge with a reduction of nitrate and ferrous ion accompanied by a small amount of nitrogen gas. After 84 days of culture, the highest inversion of ammonia was 29.85 mg·L-1, the conversion rate of ammonia reached 59.7%, and the highest nitrate concentration of the reactor effluent was 24.56 mg·L-1. Feammox in activated sludge was a process that resulted in acid leading, which decreased the pH value. The structure of community bands changed during the whole incubation, some communities were retained and part of the dominant bacteria were enriched in the reaction of activated sludge. |
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| Keywords: | activated sludge anaerobic environment ferric reduction and ammonia oxidation denaturing gradient gel electrophoresis (DGGE) microbial community |
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