尾气分析法测定微孔曝气器工艺状态下氧传质效率的优化研究

高伟; 李小冬; 陈祥春; 齐鲁; 王洪臣; 刘国华; 罗云湘

doi:10.13205/j.hjgc.202509005

尾气分析法测定微孔曝气器工艺状态下氧传质效率的优化研究

doi: 10.13205/j.hjgc.202509005

1. 中国南水北调集团生态环保有限公司, 北京 100036;
2. 云南省绿色能源产业集团有限公司, 昆明 650228;
3. 中国人民大学化学与生命资源学院, 北京 100872;
4. 济南热力集团有限公司, 济南 250011

详细信息

作者简介:
高伟，高级工程师，硕士，主要研究方向为市政污水处理及再生会用、管网工程。18611258085@163.com

通讯作者:
罗云湘，女，硕士研究生，主要研究方向为污水中新污染物的去除、新型吸附材料制备。626881331@qq.com

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出版历程
- 收稿日期: 2024-11-14
- 网络出版日期: 2025-11-05
- 刊出日期: 2025-09-01

Optimization of oxygen transfer efficiency determining for microporous aerators under process conditions using the off-gas analysis method

1. China South-to-North Water Diversion Corporation Eco-environmental Protection Co., Ltd., Beijing 100036, China;
2. Yunnan Green Energy Industry Group Co., Ltd., Kunming 650228, China;
3. School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, China;
4. Jinan Heating Group Co., Ltd., Ji'nan 250011, China

摘要

摘要: 曝气器的氧传质效率对污水处理厂的现场运行状况至关重要，测定准确的氧传质效率（oxygen transfer rate， OTE）能够指导污水处理厂节能降耗。为满足在实际工艺状态下，对曝气器传质性能测定的需求，选用了尾气分析法测定曝气器工艺状态下氧传质效率（αSOTE），并进行影响优化研究。首先对比了O₂、CO₂和水蒸气的摩尔分数对动态、静态完全尾气分析法的测试精度的影响。然后，选取不同处理工艺（A²/O、分段曝气工艺、SBR）的市政污水处理厂，采用测试精度受影响较小的尾气分析法进行现场测试，研究不同运行工艺、不同污泥浓度和污泥龄等运行工况下曝气器氧传质效率的变化规律。研究结果显示，静态完全尾气分析法的测试精度受影响较小，当OTE值>16%时，计算误差仅为1%。基于静态完全尾气分析法进行现场研究表明，αSOTE随污泥浓度和污泥龄的增大而减小。αSOTE受进水水质影响显著，在推流式曝气池中，离曝气池进水口越远，αSOTE越大。
- 微孔曝气 /
- 氧传质效率 /
- 工艺状态 /
- 尾气分析法 /
- 优化
Abstract: The oxygen transfer efficiency （OTE） of aerators is crucial for the on-site operation of these wastewater treatment plants， and accurately determining the OTE can guide these plants to save energy and reduce consumption. In order to meet the demand for assessing the mass transfer performance of aerators under actual process conditions， this study employed the off-gas analysis method to determine the oxygen transfer efficiency under process conditions （αSOTE） and conducted an impact optimization study. In this study， the effects of the molar fractions of oxygen， carbon dioxide， and water vapor on the testing accuracy of dynamic and static complete off-gas analysis methods were firstly compared. Subsequently， municipal wastewater treatment plants with different treatment processes （A²/O， step aeration process， SBR） were selected. The off-gas analysis method with less influence on testing accuracy was used for on-site testing to investigate the change rules of the OTE of the aerator under different operating conditions， such as treatment processes， sludge concentrations， and sludge ages， etc. The results showed that the static complete off-gas analysis method had no significant influence on the OTE. Moreover， the testing accuracy of this method was less affected； when the OTE value exceeded 16%， the calculation error was only 1%. A field study based on the static complete off-gas analysis method revealed that αSOTE decreased with the increase of sludge concentration and sludge age. αSOTE was significantly affected by influent water quality. In plug-flow aeration basins， αSOTE increased with increasing distance from the inlet.
- microporous aeration /
- oxygen transfer efficiency /
- process status /
- off-gas analysis method /
- optimization

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