| 低溶解氧条件下生物脱氮研究中的新现象 |
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| 引用本文： | 胡林林,王建龙,文湘华,钱易.低溶解氧条件下生物脱氮研究中的新现象[J].应用与环境生物学报,2003,9(4):444-447. |
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| 作者姓名： | 胡林林 王建龙 文湘华 钱易 |
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| 作者单位： | 清华大学环境模拟与污染控制国家重点联合实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金项目(No.59978020)资助 Supported by the National Nature Science Foundation of China |
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| 摘 要： | 活性污泥法中 ,曝气主要起供氧和扰动混合的作用 ,曝气提供的氧被微生物用来氧化有机物并合成细胞 .反应器中的溶解氧 (DO)浓度是重要的运行参数 ,曝气池中DO偏低 ,好氧微生物不能正常生长和代谢 ;DO过高 ,不仅能耗增加 ,而且细菌的活力也会降低 .一般要求曝气池中DO不低于 2mgL-1的水平 ,但在实践中常常会出现曝气强度过高的情况 .因而有必要通过有效手段将DO控制在适当的水平 ,既不影响微生物的正常生长和有机物的去除 ,同时又避免过多能耗 .传统观点认为 ,低DO条件会促进丝状菌生长 ,破坏污泥絮体的沉降性能 ;使胞外多聚物的产生量…
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| 关 键 词： | 低溶解氧 生物脱氮 好氧颗粒污泥 活性污泥 |
| 修稿时间： | 2002年6月26日 |
IMPROVEMENTS ON BIOLOGICAL NITROGEN REMOVAL UNDER LOW DISSOLVED OXYGEN CONCENTRATION |
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| HU Linlin ,WANG Jianlong,WEN Xianghua & QIAN Yi.IMPROVEMENTS ON BIOLOGICAL NITROGEN REMOVAL UNDER LOW DISSOLVED OXYGEN CONCENTRATION[J].Chinese Journal of Applied and Environmental Biology,2003,9(4):444-447. |
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| Authors: | HU Linlin WANG Jianlong WEN Xianghua & QIAN Yi |
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| Institution: | HU Linlin **,WANG Jianlong,WEN Xianghua & QIAN Yi |
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| Abstract: | In aerobic wastewater treatment process, low dissolved oxygen (DO) concentration was generally thought to be harmful to aerobic microorganisms, especially to nitrifying microbes. In fact, ammonium could be well converted under low DO and low DO condition could obviously lead to energy saving. In recent years, some new phenomena were found in nitrogen removal reactors operated at low DO concentration, such as sludge granulation;short-cut nitrification -denitrification; simultaneous nitrification-denitrification and denitrification by autotrophic nitrifier. These phenomena were valuable because they could give new method or some convenience to nitrogen removal process. Fig 1, Tab 1, Ref 36 |
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| Keywords: | low DO nitrogen removal aerobic granular sludge short-cut nitrification-denitrification simultaneous nitrification-denitrification aerobic de-ammonification OLAND |
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