[1]云玉攀,丁金蝶,薛世玉,等.容积比和HRT对A2/O低氧脱氮除磷的影响[J].中国给水排水,2026,42(7):58-64.
　YUNYupan,DINGJindie,XUEShiyu,et al.Effect of Volume Ratio and HRT on Nitrogen and Phosphorus Removal in Low-oxygen A2/O Process[J].China Water & Wastewater,2026,42(7):58-64.
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容积比和HRT对A2/O低氧脱氮除磷的影响

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第42卷 期数: 2026年第7期 页码: 58-64 栏目: 出版日期: 2026-04-01
Title:
Effect of Volume Ratio and HRT on Nitrogen and Phosphorus Removal in Low-oxygen A2/O Process
作者:
云玉攀1， 丁金蝶1， 薛世玉1， 王晓磊2， 侯成林3， 李洪瑞3， 苗志加1
（1.河北地质大学 河北省高校生态环境地质应用技术研发中心，河北 石家庄 050031；2.河北粤海水务集团有限公司 河北省污水治理与资源化技术创新中心，河北 石家庄 050031；3.北方工程设计研究院有限公司，河北 石家庄 050011）
Author(s):
YUN　Yupan1， DING　Jindie1， XUE　Shiyu1， WANG　Xiaolei2， HOU　Chenglin3， LI　Hongrui3， MIAO　Zhijia1
（1. Hebei Center for Ecological and Environmental Geology Research， Hebei GEO University， Shijiazhuang 050031， China； 2. Wastewater Treatment and Resource Reusing Technology Innovation Center of Hebei Province， Hebei Yuehai Water Group Co. Ltd.， Shijiazhuang 050031， China； 3. Norendar International Ltd.， Shijiazhuang 050011， China）
关键词:
A2/O工艺;  低氧;  脱氮除磷;  容积比;  水力停留时间
Keywords:
A2/O process;  low dissolved oxygen;  nitrogen and phosphorus removal;  volume ratio;  hydraulic retention time (HRT)
摘要:
考察了A2/O低氧运行时（DO为0.5~1.0 mg/L），系统厌氧、缺氧、好氧区的容积比和水力停留时间（HRT）对去除低C/N污水中氮、磷效果的影响。结果表明，在没有外部碳源投加情况下，合理控制系统厌氧、缺氧、好氧区容积比和HRT，污水中的COD、NH4+-N、TN和PO43--P等均能被高效去除。当HRT为12 h、V厌氧∶V缺氧∶V好氧为3∶4∶7时，COD被有效去除，且去除率高达91.2%，出水COD低于20 mg/L。进水中的COD主要在厌氧区被去除，其被聚磷菌（PAOs）和聚糖菌（GAOs）用于合成细胞内碳源PHA。当HRT为9 h、V厌氧∶V缺氧∶V好氧为4∶4∶6时，系统可以达到稳定的脱氮除磷效果，TN、PO43--P出水分别小于11、0.5 mg/L，去除率分别为81%、89.2%。系统对磷的去除主要通过缺氧反硝化除磷和好氧吸磷过程来实现，其中反硝化除磷是主要途径。系统脱氮以缺氧区的内源反硝化、反硝化除磷作用为主，并且伴随好氧区的短程硝化、同步硝化反硝化过程。另外，对系统进行菌群丰度和多样性分析发现，系统中起脱氮除磷作用的微生物主要为聚糖菌（Candidatus_Competibacter）、反硝化细菌（Azospira、Terrimonas和Dechloromonas）、硝化细菌（Nitrospira、Nitrosomonas）及反硝化聚磷菌（Hyphomicrobium）。
Abstract:
This study investigated the effect of the volume ratio of anaerobic, anoxic，and aerobic zones and hydraulic retention time (HRT) on the removal of nitrogen and phosphorus from low C/N wastewater when the A2/O process was operated under low dissolved oxygen conditions (DO: 0.5-1.0 mg/L). The results showed that, without the addition of external carbon sources, COD, NH4+-N, TN and PO43--P in the wastewater could be efficiently removed by reasonably controlling the volume ratio of the anaerobic, anoxic, and aerobic zones and the HRT. When the HRT was 12 h and Vanaerobic ∶ Vanoxic ∶ Vaerobic was 3∶4∶7, COD was effectively removed, with the removal rate reaching as high as 91.2%, and the effluent COD concentration was below 20 mg/L. The influent COD was mainly removed in the anaerobic zone, where it was utilized by phosphorus-accumulating organisms (PAOs) and glycogen-accumulating organisms (GAOs) to synthesize the intracellular carbon source PHA. When the HRT was 9 h and Vanaerobic ∶ Vanoxic ∶ Vaerobic was 4∶4∶6, the system achieved stable nitrogen and phosphorus removal. The effluent TN and PO43--P concentrations were below 11 mg/L and 0.5 mg/L, with removal rates of 81% and 89.2%, respectively. Phosphorus removal in the system was mainly achieved through anoxic denitrifying phosphorus removal and aerobic phosphorus uptake, with denitrifying phosphorus removal being the primary pathway. Nitrogen removal was primarily accomplished through anoxic endogenous denitrification and denitrifying phosphorus removal, accompanied by aerobic partial nitrification and simultaneous nitrification and denitrification. An analysis of the microbial abundance and diversity of the system revealed that the main microorganisms responsible for nitrogen and phosphorus removal were glycogen-accumulating organisms (Candidatus_Competibacter), denitrifying bacteria (Azospira, Terrimonas and Dechloromonas), nitrifying bacteria (Nitrospira and Nitrosomonas), and denitrifying phosphorus?accumulating organisms (Hyphomicrobium).

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更新日期/Last Update: 2026-04-01