[1]高伟楠,田萌,程树辉,等.两级AO与三级AO工艺比较与工程实践[J].中国给水排水,2025,41(12):52-57.
　GAOWei-nan,TIANMeng,CHENGShu-hui,et al.Comparison of Two-stage AO and Three-stage AO Processes: An Engineering Perspective[J].China Water & Wastewater,2025,41(12):52-57.
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两级AO与三级AO工艺比较与工程实践

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第12期 页码: 52-57 栏目: 出版日期: 2025-06-17
Title:
Comparison of Two-stage AO and Three-stage AO Processes: An Engineering Perspective
作者:
高伟楠1， 田萌1，2， 程树辉1， 纪海霞1
（1.北京市市政工程设计研究总院有限公司，北京 100082；2.清华大学 环境学院，北京 100084）
Author(s):
GAO　Wei-nan1， TIAN　Meng1，2， CHENG　Shu-hui1， JI　Hai-xia1
（1. Beijing General Municipal Engineering Design & Research Institute Co. Ltd.， Beijing 100082， China； 2. School of Environment， Tsinghua University， Beijing 100084， China）
关键词:
两级AO工艺;  三级AO工艺;  污水处理厂;  BioWin仿真模拟;  悬浮载体
Keywords:
two-stage AO process;  three-stage AO process;  sewage treatment plant;  BioWin simulation;  suspended carrier
摘要:
多级AO工艺可以降低内回流比，提高TN去除效果，目前已得到广泛应用。以华南某污水厂为例，同步考虑近期5×104 m3/d处理规模、远期7×104 m3/d处理规模、远期TN≤10 mg/L需求，对两级AO和三级AO工艺进行技术经济比较。BioWin仿真模拟结果显示，两级AO的设备及分段数少，设备费用低，运行管理难度低，更适用于华南地区进水TN不高的情况；三级AO在第Ⅲ级末端设置向第Ⅰ级缺氧区的内回流，反而影响TN去除效果，增大了管理运行难度，提高了投资费用。远期7×104 m3/d的处理规模可通过耦合悬浮载体实现。实际运行效果与BioWin模拟结果基本相符，出水TN均值为6.86 mg/L，满足设计要求。
Abstract:
Multi-stage AO can effectively decrease the internal reflux ratio while enhancing total nitrogen (TN) removal efficiency,therefore, it has been widely applied in recent years. The short-term treatment capacity of a sewage treatment plant in South China is 50 000 m3/d, while its long-term treatment capacity is 70 000 m3/d. In this study, a comprehensive technical and economic comparison was performed between the two-stage AO and the three-stage AO to achieve the long-term effluent TN remaining no more than 10 mg/L. The simulation results obtained from BioWin indicated that the two-stage AO featured fewer equipment units and sections, resulting in lower capital costs for equipment, reduced operational complexity, and easier management. Consequently, this process is better suited to the conditions in South China, where the influent TN is relatively low. In the three-stage AO, the configuration of internal reflux to the anoxic zone Ⅰ from the end of zone Ⅲ not only influenced the TN removal efficiency but also increased the complexity of management and operation, while raising capital investment costs. The long-term processing capacity of 70 000 m3/d can be achieved through the integration of suspended carriers. The actual operational outcomes were largely in agreement with the simulation results obtained from BioWin. The predicted average effluent TN was 6.86 mg/L, which met the design requirements.
更新日期/Last Update: 2025-06-17