| 气升装置对厌氧氨氧化污泥形态及性能的影响 |
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| 引用本文： | 李祥,黄勇,袁怡,周呈,陈宗姮,张大林. 气升装置对厌氧氨氧化污泥形态及性能的影响[J]. 环境科学, 2014, 35(12): 4636-4641 |
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| 作者姓名： | 李祥 黄勇 袁怡 周呈 陈宗姮 张大林 |
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| 作者单位： | 苏州科技学院环境科学与工程学院，苏州 215011; 苏州科技学院环境生物技术研究所，苏州 215011 |
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| 基金项目： | 国家自然科学基金项目，江苏省环境保护厅重大项目 |
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| 摘 要： | 通过接种粒径小于0.9 mm的厌氧氨氧化污泥,启动具有气升装置的上流式厌氧反应器.利用厌氧氨氧化过程产生的氮气作为动力,研究了气升回流系统在厌氧反应器中对厌氧氨氧化污泥形态和性能的影响.结果表明,在反应器启动初期,反应器脱氮速率较低,产气量很小,导致厌氧氨氧化污泥易于凝聚.当脱氮速率达到3.4 kg·(m3·d)-1时,气升产生的回流量明显,反应器自回流系统形成.经过183 d运行,污泥颗粒中MLVSS含量随着污泥粒径增加而不断增长,粒径分布主要集中在1.6~2.5 mm,占污泥总体积的53.2%.与外置回流泵相比,气升装置具有同样功能,产生的回流有利于厌氧氨氧化反应器内污泥的颗粒化,同时减少回流泵所需要的动力消耗和设备费用.
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| 关 键 词： | 厌氧氨氧化 脱氮速率 气升装置 颗粒污泥 性能 |
| 收稿时间： | 2014-05-19 |
| 修稿时间： | 2014-07-20 |
Effect of Gas-lift Device on the Morphology and Performance of ANAMMOX Sludge |
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| LI Xiang,HUANG Yong,YUAN Yi,ZHOU Cheng,CHEN Zong-heng and ZHANG Da-lin. Effect of Gas-lift Device on the Morphology and Performance of ANAMMOX Sludge[J]. Chinese Journal of Environmental Science, 2014, 35(12): 4636-4641 |
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| Authors: | LI Xiang HUANG Yong YUAN Yi ZHOU Cheng CHEN Zong-heng ZHANG Da-lin |
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| Affiliation: | School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215011, China;School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215011, China;School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215011, China;School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215011, China;School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215011, China;School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China;Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215011, China |
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| Abstract: | The upflow reactor with gas-lift device was started up by inoculating ANAMMOX sludge granules of less than 0.9 mm. The effects of gas lift device system on the morphology and performance of ANAMMOX sludge were studied by using the nitrogen gas produced in ANAMMOX to drive the effluent circulation in the reactor. The results showed that, the airlift circulation function was not clear in the startup stage of the reactor, because the nitrogen gas production was very low. At the same time, the ANAMMOX granular sludge was easy to condensate. When the load rate of nitrogen removal reached 3.4 kg·(m3·d)-1, the function of gas lift was significant, resulting in gradually increased effluent self-circulation, and the granules were dispersed and grew gradually. After 183d of operation, the granular sludge was dominated by the granules with sizes of 1.6-2.5 mm, which accounted for 53.2% of the total sludge volume. The MLVSS contentincreased with the increase of sludge particle size. The gas lift device had the same function as the external reflux pump, and was helpful for sludge granulation in the ANAMMOX reactor, while reducing power consumption and the cost of the equipment. |
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| Keywords: | ANAMMOX nitrogen removal efficiency gas-lift device granular sludge performance |
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