全自养脱氮工艺研究进展

全自养脱氮工艺比传统的硝化反硝化工艺节省大量的硝化需氧量和反硝化需COD量,是废水生物脱氮技术的研究热点。介绍了CANON工艺、SHARON-ANAMMOX联合工艺和OLAND工艺的研究进展,论述了全自养脱氮颗粒污泥的培养、强化及中间产物N2O产生的影响因素。最小沉降速率和体积交换比是培养全自养脱氮颗粒污泥的关键控制条件;添加微量NO2和N2H4可强化全自养脱氮过程;影响中间产物N2O排放的因素包括NO2-浓度、DO等。

Research Progress on the Completely Autotrophic Nitrogen Removal

Comparing to traditional nitrification-denitrification process,completely autotrophic nitrogen removal over nitrite process,which attracted a lot of attentions,could decrease O2 consuming and hardly consumed COD theoretically.Research progress on the CANON process,SHARONANAMMOX process and OLAND process were produced,and the cultivation and enhancement of completely autotrophic nitrogen removal granular sludge and the influence factors of the N2O production were reviewed.A low volumetric exchange ratio and a low critical minimum settling velocity were crucial for the granulation.Trace NO2 addition and N2H4 addition could enhance the completely autotrophic nitrogen removal process.The concentration of NO2-and DO could influence the production of the intermediates N2O.