三级AO工艺中的硝化液回流比对食品工业废水的处理影响  

Effect of Nitrate Reflux Ratio of Tertiary AO Process on Food Industry Wastewater Treatment

作　　者：生骏 马子航 林莉峰 林剑雄 周振 SHENG Jun;MA Zihang;LIN Lifeng;LIN Jianxiong;ZHOU Zhen(Shanghai Municipal Engineering Design and Research InstituteCo.,Ltd.,Shanghai 200092,China;College of Enrironmental and Chemical Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海市政工程设计研究总院<集团>有限公司,上海200092 [2]上海电力大学环境与化学工程学院,上海200090

出　　处：《净水技术》2025年第2期132-138,157,共8页Water Purification Technology

摘　　要：【目的】研究旨在系统探讨硝化液回流比对食品工业废水处理效果的影响,聚焦于不同回流系统下三级缺氧/好氧(AO)工艺的硝化与反硝化性能差异,并分析硝化液回流比对溶解性有机物降解规律的作用机制。【方法】通过构建双回流系统(400%)与单回流系统(200%)的三级AO工艺模型,定量比较2种系统对食品工业废水中氨氮和总氮(TN)去除效果的差异。结合荧光光谱和二维相关性分析,深入探讨溶解性有机物中类富里酸和类腐殖质的降解规律与效率。【结果】硝化液回流比的增加显著提升三级AO系统的硝化和反硝化能力,双回流系统氨氮和TN去除率分别稳定在97.4%±2.8%和91.6%±3.3%,平均出水氨氮和TN质量浓度分别为(1.3±0.5)mg/L和(5.7±1.8)mg/L,满足排放标准要求。荧光类物质分析表明,双回流系统内微生物活性高于单回流系统,类富里酸和类腐殖质的降解程度显著提升。二维相关性分析显示,尽管回流比的变化未影响溶解性有机物(DOM)的降解顺序,但双回流系统在富里酸类物质与腐殖质的降解效率方面表现出显著优势。【结论】双回流系统能够显著提升食品工业废水处理过程中氨氮和总氮的去除效果,同时增强溶解性有机物中类富里酸和类腐殖质的降解效率,为实际工程中三级AO工艺的优化提供了重要的理论依据和实践指导。[Objective]This study aims to systematically investigate the impact of nitrification liquid recirculation ratios on the treatment efficiency of food industry wastewater,focusing on the differences in nitrification and denitrification performance under various recirculation configurations in a three-stage anoxic/oxic(AO)system.Additionally,the study examines the effect of recirculation ratios on the degradation mechanisms of dissolved organic matter(DOM).[Methods]A three-stage AO process was modeled using a dual-recirculation system(400%)and a single-recirculation system(200%).The treatment performance was quantitatively compared in terms of ammonia nitrogen and total nitrogen(TN)removal efficiencies.Fluorescence spectroscopy and two-dimensional correlation analysis were employed to explore the degradation patterns and efficiencies of DOM,specifically focusing on humic-like and fulvic-like substances.[Results]Increasing the recirculation ratio significantly enhanced the nitrification and denitrification capabilities of the three-stage AO system.In dual-recirculation system,ammonia nitrogen and TN removal efficiencies were stabilized at 97.4%±2.8%and 91.6%±3.3%,respectively,with average effluent ammonianitrogen and TN mass concentrations of(1.3±0.5)mg/L and(5.7±1.8)mg/L,meeting discharge standards.Fluorescence spectroscopy revealed that microbial activity was higher in dual-recirculation system compared to the single-recirculation system,with significantly improved degradation of fulvic-like and humic-like substances.Twodimensional correlation analysis indicated that while changes in the recirculation ratio did not alter the degradation sequence of DOM,the dual-recirculation system exhibited superior degradation efficiency,with fulvic-like substances being degraded prior to humic-like substances.[Conclusion]The dual-recirculation system significantly improves the removal efficiency of ammonia nitnogen and TN in treatment of food industry wastewater while enhancing the degradation of fulvic-like and humic-like s

关 键 词：食品工业废水 三级缺氧/好氧(AO)工艺 脱氮 溶解性有机物(DOM) 硝化液回流比 

分 类 号：X703[环境科学与工程—环境工程]