[1]齐宇轩,丁静,曹效鑫,等.基于运行诊断的多级AO工艺分段进水优化与效能提升[J].中国给水排水,2026,42(14):130-137.
　QiYuxuan,DingJing,CaoXiaoxin,et al.Optimization of Step-feed and Efficiency Improvement in a Multi?stage AO Process Based on Operational Diagnosis[J].China Water & Wastewater,2026,42(14):130-137.
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基于运行诊断的多级AO工艺分段进水优化与效能提升

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第42卷 期数: 2026年第14期 页码: 130-137 栏目: 出版日期: 2026-07-17
Title:
Optimization of Step-feed and Efficiency Improvement in a Multi?stage AO Process Based on Operational Diagnosis
作者:
齐宇轩1， 丁静1， 曹效鑫1， 郑凯凯2， 吴东立3， 涂强3， 艾朝3， 谢丰3， 周少奇4
（1.信开环境投资集团有限公司，北京 101101；2.江南大学 环境与生态学院，江苏 无锡 214122；3.自贡信开水环境治理有限公司，四川 自贡 643000；4.贵州大学 资源与环境工程学院，贵州 贵阳 550025）
Author(s):
Qi　Yuxuan1， Ding　Jing1， Cao　Xiaoxin1， Zheng　Kaikai2， Wu　Dongli3， Tu　Qiang3， Ai　Zhao3， Xie　Feng3， Zhou Shaoqi4
（1. Xinkai Environmental Investment Group Co. Ltd.， Beijing 101101， China； 2. School of Environment and Ecology， Jiangnan University， Wuxi 214122， China； 3. Zigong Xinkai Water Environmental Treatment Co. Ltd.， Zigong 643000， China； 4. School of Resources and Environmental Engineering， Guizhou University， Guiyang 550025， China）
关键词:
低碳氮比;  多级AO工艺;  比硝化速率;  分段进水;  碳源分配
Keywords:
low C/N ratio;  multi-stage AO process;  specific nitrification rate;  step-feed;  carbon source distribution
摘要:
针对自贡市某污水处理厂多级AO工艺在低碳氮比进水条件下的碳源分配失衡问题，本研究基于历史运行数据与生化段沿程测试，系统解释了一级好氧池有机负荷过高与二级缺氧池反硝化碳源不足的矛盾现象。通过活性污泥比硝化速率定量分析，提出分段进水分配比例的优化计算方法，并实施工程改造，将原水分流至二级缺氧池，实现碳源精准分配。运行结果表明，二级缺氧池分水50%后，系统脱氮效果显著增强，生化出水硝态氮较对照系列降低1.95 mg/L，一级好氧池的溶解氧和比硝化速率明显提升。同期乙酸钠投加量由17.18 mg/L降至10.55 mg/L，平均节省碳源费用19万元/a。
Abstract:
Addressing the carbon source allocation imbalance in a multi-stage AO process at a wastewater treatment plant in Zigong under low influent C/N ratio conditions, this study systematically explained the contradictory issues of excessive organic loading in the primary aerobic zone and insufficient carbon source for denitrification in the secondary anoxic zone, based on historical operational data and biochemical process profiling. Through quantitative analysis of the specific nitrification rate of the activated sludge, an optimized calculation method for determining the step-feed distribution ratio was developed. Corresponding engineering modifications were implemented to redirect a portion of the raw influent to the secondary anoxic zone, achieving precise carbon source redistribution. Operational results demonstrated that after diverting 50% of the influent to the secondary anoxic zone, the system’s nitrogen removal efficiency was significantly enhanced. The effluent nitrate nitrogen concentration decreased by 1.95 mg/L compared to the parallel control train, while the dissolved oxygen concentration and specific nitrification rate in the primary aerobic zone increased markedly. Consequently, the sodium acetate dosing rate decreased from 17.18 mg/L to 10.55 mg/L, yielding an annual saving of approximately 190 000 CNY in carbon source costs. This research provides a theoretical framework and a practical case study for the optimization and control of carbon source allocation in wastewater treatment plants treating low C/N ratio wastewater.

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更新日期/Last Update: 2026-07-17