| 基于表面改性曝气膜的膜曝气生物膜反应器硝化性能研究 |
| 作者: 陈亚松1, 刘佳音2, 柳蒙蒙1, 孙宛1, 程刚2, 完颜德卿2,张聪聪2, 邱勇2, 黄霞2* |
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单位:
1.中国长江三峡集团有限公司 长江经济带生态环境国家工程研究中心, 武汉 430014; 2. 清华大学 环境学院, 北京 100084 |
| 关键词: 膜曝气生物膜反应器(MABR); 曝气膜; 表面改性; 硝化性能; 微生物群落 |
| DOI号: 10.16159/j.cnki.issn1007-8924.2026.03.013 |
| 分类号: TQ028.3; X703 |
| 出版年,卷(期):页码: 2026, 46(3):129-137 |
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摘要: |
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构建了一种基于表面物理改性曝气膜的膜曝气生物膜反应器(MABR)系统,重点考察了不同运行参数对硝化性能的影响。通过对曝气膜表面进行条纹加工处理和纱网缠绕改性,显著提升了MABR生物膜的附着能力与稳定性。实验结果表明,系统仅需12 d即可完成挂膜启动。稳定运行后,系统表现出稳定的硝化性能与负荷适应能力。在进水氨氮质量浓度21~107 mg/L范围内,氨氮去除负荷与进水浓度呈正相关;当供气量为5 L/(m2·h)时,系统氨氮去除负荷可达2 g/(m2·d),继续增加气量对氨氮去除效果无显著提升;在低压(0~12 kPa)范围内,适当增加膜压可使氨氮去除负荷提升19%;当压力升至中压(24 kPa)后,去除效果则趋于稳定;此时的最小理论氧传递速率达11.43 gO2/(m2·d),显著高于清水条件下的4.05 gO2/( m2·d)。后期稳定运行中,系统氨氮去除负荷可稳定维持在2 g/(m2·d)。高通量测序结果显示,MABR生物膜中硝化菌属Nitrosomonas和Nitrospira的平均丰度较接种污泥分别提高了约6.1个百分点和5.3个百分点。表面物理改性后的曝气膜有利于生物膜的稳定形成,强化了MABR系统的硝化性能与运行稳定性。 |
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This study developed a Membrane Aerated Biofilm Reactor (MABR) system utilizing a surface-physically modified aeration membrane to investigate the effects of key operational parameters on nitrification performance. Surface modifications, including patterned striping and mesh wrapping, significantly enhanced the biofilm attachment capacity and stability in the MABR. Experimental results demonstrated a rapid biofilm start-up period of only 12 days. Upon achieving stable operation, the system exhibited a stable nitrification efficiency and load adaptability. With the influent ammonia nitrogen concentration ranging of 21~107 mg/L, the ammonia removal load showed a positive correlation with the influent concentration. At an aeration rate of 5 L/(m2·h), the system achieved an ammonia removal load of 2 g/(m2·d), and further increasing the aeration rate did not significantly enhance the removal efficiency. In the low transmembrane pressure range (0~12 kPa), appropriately increasing the pressure led to a 19% improvement in ammonia removal load. However, when the pressure was elevated to a medium level (24 kPa), the removal performance stabilized. The corresponding minimum theoretical oxygen transfer rate under these conditions reached 11.43 g O2/(m2·d), which was significantly higher than the rate of 4.05 g O2/(m2·d) measured in clean water. During extended stable operation, the system maintained a consistent ammonia removal load of 2 g/(m2·d). High-throughput sequencing revealed that the average relative abundances of the nitrifying bacterial genera Nitrosomonas and Nitrospira in the MABR biofilm increased by approximately 6.1 and 5.3 percent points, respectively, compared to the inoculated sludge. These findings indicate that the surface-physically modified aeration membrane facilitates stable biofilm formation, thereby enhancing the nitrification performance and operational stability of the MABR system. |
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基金项目: |
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中国长江三峡集团公司科研项目资助(NBWL202300013) |
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作者简介: |
| 第一作者简介: 陈亚松(1982-),男,湖北黄石人,博士,正高级工程师,研究方向为水环境系统治理; 刘佳音(1985-),女,黑龙江齐齐哈尔人,硕士,高级工程师,研究方向为污水资源化。*通讯作者,E-mail: xhuang@tsinghua.edu.cn |
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参考文献: |
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[1]Hreiz R, Latifi M A, Roche N. Optimal design and operation of activated sludge processes: State-of-the-art[J]. Chem Eng J, 2015, 281: 900-920. |
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