基于溶解氧和缺氧时长调控的间歇曝气策略对短程硝化脱氮工艺的影响

Effect of intermittent aeration strategy based on dissolved oxygen and anoxic period regulation on partial nitrification process

短程硝化的实现可推动能源节约型脱氮工艺的应用。通过阐述间歇曝气策略实现短程硝化的机理,分析了应用间歇曝气策略实例中的运行参数,总结了DO协同缺氧时长分别在单独短程硝化工艺、短程硝化-反硝化(PN/D)工艺以及短程硝化-厌氧氨氧化(PN/A)工艺中的影响效果,如对功能菌活性和系统脱氮效率的影响;提出了以功能菌种、污泥存在形式等影响途径作为依据,基于DO协同缺氧时长的调控策略,并对各脱氮工艺中的运行参数进行优化,以期为各工艺系统实现最佳运行效果提供参考。

The realization of partial nitrification can promote the application of energy-saving nitrogen removal process.By illustrating the mechanism of intermittent aeration strategy to achieve partial nitrification and analyzing the operation parameters in the application of intermittent aeration strategy,the effects of dissolved oxygen(DO)synergistic anoxic time on single partial nitrification process,partial nitrification and denitrification(PN/D)process and partial nitrification and anammox(PN/A)process were summarized,such as the effects on the activity of functional bacteria and the nitrogen removal efficiency of the system.In order to parovide reference for realizing the best operation effect of each process,the operation parameters of each denitrification process were optimized based on the regulation strategy of DO synergistic hypoxia duration on the basis of the influence approaches of functional bacteria species and sludge forms.