[1]李岩,刘颖诗,于翔,等.AAOA-MBR工艺的N2O排放规律及生成机理[J].中国给水排水,2025,41(21):96-103.
　LIYan,LIUYing-shi,YUXiang,et al.Nitrous Oxide Emission Characteristics and Formation Mechanism in AAOA-MBR Process[J].China Water & Wastewater,2025,41(21):96-103.
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AAOA-MBR工艺的N2O排放规律及生成机理

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第21期 页码: 96-103 栏目: 出版日期: 2025-11-01
Title:
Nitrous Oxide Emission Characteristics and Formation Mechanism in AAOA-MBR Process
作者:
李岩1， 刘颖诗2， 于翔2， 李浩2， 董浩韬2， 杜至力2， 罗凡2， 陈世飞1
（1.广州市城市排水监测站，广东 广州 510510；2.广州市市政工程设计研究总院有限公司，广东 广州 510663）
Author(s):
LI　Yan1， LIU　Ying-shi2， YU　Xiang2， LI　Hao2， DONG　Hao-tao2， DU　Zhi-li2， LUO　Fan2， CHEN　Shi-fei1
（1. Guangzhou Urban Drainage Monitoring Station， Guangzhou 510510， China； 2. Guangzhou Municipal Engineering Design & Research Institute Co. Ltd.， Guangzhou 510663， China）
关键词:
N2O;  排放因子;  AAOA-MBR工艺;  微生物菌群结构;  氮代谢路径
Keywords:
nitrous oxide (N2O);  emission factor;  AAOA-MBR process;  microbial community structure;  nitrogen metabolic pathway
摘要:
通过对某厌氧-缺氧-好氧-缺氧/MBR（AAOA-MBR）工艺污水处理厂进行全流程N2O排放量检测和N2O排放因子核算，考察该工艺沿程N2O排放规律，结合宏基因组全基因测序技术，进一步阐释该工艺的微生物菌群结构特征和氮代谢路径。结果表明，该污水处理厂的全流程N2O排放总量为12.303 kg/d，其中，预处理阶段的N2O排放量最高，达到2.709 kg/d，生化处理阶段中MBR池的N2O排放量最高，达到1.940 kg/d。该厂全流程N2O排放因子为0.001 534 kgN2O-N/kgNinf，小于IPCC推荐值（0.016 kgN2O-N/kgNinf）以及《城镇水务系统碳核算与减排路径技术指南》中AAO工艺案例的平均值（0.004 66 kgN2O-N/kgNinf），但与我国部分根据实测法计算的AAO工艺案例结果接近。AAOA-MBR工艺中与氮代谢相关的丰度最高的菌属为Comamonas，相对丰度达到1.90%~2.96%；在氮代谢过程中，除厌氧氨氧化路径之外的其他氮代谢路径均被检出。
Abstract:
A comprehensive investigation was conducted on nitrous oxide (N2O) emission throughout the entire process and the emission factor was calculated for a full-scale anaerobic-anoxic-aerobic-anoxic and membrane bioreactor (AAOA-MBR) wastewater treatment plant (WWTP). The emission characteristics of N2O along the AAOA-MBR process were analyzed. Furthermore, the microbial community structure and key nitrogen metabolic pathways involved in the process were elucidated by integrating metagenomic whole-genome sequencing technology. The total N2O emission from the entire wastewater treatment process amounted to 12.303 kg/d. The pretreatment stage exhibited the highest N2O emission, reaching 2.709 kg/d. Within the biochemical treatment stage, the MBR demonstrated the greatest N2O emission of 1.940 kg/d. The N2O emission factor for the entire process at this WWTP was 0.001 534 kgN2O-N/kgNinf, which was lower than both the IPCC recommended value (0.016 kgN2O-N/kgNinf) and the average value reported for AAO process cases in Guidelines for Carbon Accounting and Emission Reduction in the Urban Water Sector (0.004 66 kgN2O-N/kgNinf), while being consistent with the results from certain AAO process cases in China derived using the measurement-based method. In the AAOA-MBR process, Comamonas was the predominant genus associated with nitrogen metabolism, exhibiting a relative abundance of 1.90%-2.96%. During nitrogen metabolism, all metabolic pathways were detected except for the Anammox pathway.

相似文献/References:

[1]吴青,贾炎,崔延瑞,等.生物活性炭对SBR生物脱氮过程中N2O产生的影响[J].中国给水排水,2021,37(9):33.
　WU Qing,JIA Yan,CUI Yan-rui,et al.Effects of BAC on N2O Production during Biological Nitrogen Removal Process in SBR under Different C/N Ratios[J].China Water & Wastewater,2021,37(21):33.
[2]高嘉,宗倪,刘健,等.表面曝气型氧化沟中N2O产排特征与关键影响因素[J].中国给水排水,2025,41(19):95.
　GAOJia,ZONGNi,LIUJian,et al.N2O Production and Discharge Characteristics and Key Influencing Factors of Surface Aeration Oxidation Ditch Process[J].China Water & Wastewater,2025,41(21):95.

更新日期/Last Update: 2025-11-01