| 水力剪切力对厌氧反应器启动的影响 |
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| 引用本文： | 吴静,周红明,姜洁.水力剪切力对厌氧反应器启动的影响[J].环境科学,2010,31(2):368-372. |
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| 作者姓名： | 吴静 周红明 姜洁 |
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| 作者单位： | 清华大学环境科学与工程系环境模拟与污染控制国家重点联合实验室; |
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| 基金项目： | 国家自然科学基金项目(50308013,50678090);;霍英东基金优选项目(114020);;美国美铝基金项目 |
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| 摘 要： | 升流式厌氧反应器以絮状污泥为种泥启动,启动过程主要关注COD去除率的提高以及污泥颗粒化的情况.污泥颗粒化过程包括"成核"以及"在核基础上成熟"2个步骤,"成核"作为颗粒化的起点尤为重要.本实验运用课题组建立的定量方法,研究了在低、中、高水力剪切力条件下的絮状污泥的成核过程.在成核过程中,污泥平均粒径(average sludge diameter,ASD)、含核率(nucleus ratio,NR)都与运行时间明显线性相关,ASD的增长速率分别为0.40、0.51和0.41μm.d-1.中等水力条件下污泥的成核速度最快,相应的剪切速率为8.28 s-1,液相和气相上升流速分别为2.66和0.24 m/h.高水力剪切力下,污泥的COD去除率增长快.同时污泥去除能力与污泥性质密切相关,在试验条件下,ASD的增长速率与COD去除率达到92%的快慢是一致的.
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| 关 键 词： | 水力剪切力 启动 絮状污泥 厌氧颗粒化 成核 |
| 收稿时间： | 2009/3/23 0:00:00 |
| 修稿时间： | 2009/7/18 0:00:00 |
Effects of Hydrodynamic Force on Start-up of Anaerobic Reactor |
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| WU Jing,ZHOU Hong-ming and JIANG Jie.Effects of Hydrodynamic Force on Start-up of Anaerobic Reactor[J].Chinese Journal of Environmental Science,2010,31(2):368-372. |
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| Authors: | WU Jing ZHOU Hong-ming and JIANG Jie |
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| Institution: | State Key Joint Laboratory of Environment Simulation and Pollution Control;Department of Environmental Science & Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | The keystones of the start-up of upflow anaerobic reactor with flocculent sludge as seed include the improvement of COD removal and sludge granulation.The anaerobic sludge granulation consists of two steps,namely nucleation and maturation upon nuclei.The nucleation as the starting point is of particular importance.In this paper,the nucleation of flocculent sludge as seed under low,medium and high hydrodynamic shear conditions is studied with an original quantitative method.The average sludge diameters(ASD) ... |
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| Keywords: | hydrodynamic shear force start-up flocculent sludge anaerobic granulation nucleation |
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