净水技术2025，Vol.44Issue(2)：132-138,157,8.DOI:10.15890.j.cnki.jsjs.2025.02.015
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
生骏 1马子航 2林莉峰 1林剑雄 1周振2
作者信息
- 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
- 折叠
摘要
Abstract
[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.Two-dimensional 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 substances in DOM.These findings provide critical theoretical support and practical guidance for optimizing three-stage AO processes in engineering applications.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Key words
food industry wastewater/tertiary anoxic/oxic(AO)process/nitrogen removal/dissolved organic matter(DOM)/nitrate reflut ratio分类
资源环境引用本文复制引用
生骏,马子航,林莉峰,林剑雄,周振..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[J].净水技术,2025,44(2):132-138,157,8.
