短程硝化反硝化生物脱氮的实现途径

The Realizing Approaches of Shortcut Nitrification and Denitrification

短程硝化反硝化是近年来开发的一项新的生物脱氮技术,它具有节约曝气量、节省有机碳源和减少污泥产量等优点,实现短程硝化反硝化生物脱氮技术的关键就是将硝化控制在亚硝酸阶段,阻止亚硝酸盐的进一步氧化。简要介绍了短程硝化反硝化生物脱氮技术的原理和技术特点,通过对短程硝化反硝化影响因素的分析来介绍其实现途径,阐述了温度控制途径、溶解氧控制途径、pH值控制途径、投加抑制剂途径、泥龄控制途径以及纯种分离与固定化技术途径的控制机理及其局限性,并提出了今后的研究方向。

Shortcut nitrification and denitrification is a new bio- denitrification technology developed in recent years, it has a lot of advantages such as saving supply of oxygen, saving carbon and reducing sludge production and so on. Keep nitrification in the stage of nitrosificafion and prevent the oxidation of nitrous acid is the key point to realize shortcut nitrification and denitrification. This paper briefly introduces the principle and technical features of shortcut nitrification and denitrification , introduces the realizing approaches through analyzing its influence-factors, expounds the control mechanism and the limitation of temperature control approach, dissolved oxygen control method, the pH value control method, the approach of adding inhibitor, sludge age control method as well as the technology of pure breed separation and immobilization, and the research direction of shortcut nitrification and denitrfication are put forward in the end.