| 城市污水生化处理系统中总氮去除的影响因素分析 |
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| 引用本文： | 黄宁,;陈炳东. 城市污水生化处理系统中总氮去除的影响因素分析[J]. 东莞理工学院学报, 2014, 0(3): 69-73 |
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| 作者姓名： | 黄宁, 陈炳东 |
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| 作者单位： | [1] 东莞市环保产业促进中心,广东东莞,523011; [2] 东莞市汇海环保科技有限公司,广东东莞,523808 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项（2012ZX07206004-04）。 |
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| 摘 要： | 总氮是城市污水处理的一项重要常规指标,在我国现有的城市污水处理工艺中,生化系统中影响脱氮效率的因素主要包括缺氧池容积负荷、混合液回流比、污泥龄和水温等。本研究通过中试试验发现,当缺氧池HRT大于3 hr(对应容积负荷0.24 kg TN·m-3·d-1)、混合液回流比大于150%、污泥龄不小于10d、水温高于20℃时,A2/O可以将平均值为30 mg/L的TN去除到10 mg/L以下,去除率接近70%,稳定达到一级A标准。
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| 关 键 词： | 城市污水 总氮 A/O 中试 |
An Analysis of Removal of Total Nitrogen in A2 O System for Treating Municipal Wastewater |
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| Affiliation: | HUANG Ning, CHEN Bing-dong (1. Industry Center of Dongguan Environment Protection, Dongguan 523011 ,China; 2. Huihai Environmental Protection Technology Co. Ltd, Dongguan 523808, China) |
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| Abstract: | A pilot scale A 2 O system is used for investigating the main parameters which influence the removal of total nitro -gen.The results reveal that , to reduce the total nitrogen from 30 mg/L to less than 10 mg/L which can meet the first-class A permit-ted criteria of municipal wastewater treatment plants , the volume load of the anoxic pond should be larger than 3 hr（ corresponding volumetric loading of 0.24 kg TN· m-3 · d-1 ）, the reflux ratio of the mixed liquid should exceed 150%, the sludge age should not less than 10 d and the water temperature should be higher than 20℃.The results can be applied to the removal of the total nitrogen in municipal wastewater treatment plant . |
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| Keywords: | A2/O municipal wastewater total nitrogen A2/O pilot study |
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