【作者】 李天琦； 于德爽； 王晓霞； 赵骥；

【Author】 Li Tianqi;Yu Deshuang;Wang Xiaoxia;Zhao Ji;School of Environmental Science and Engineering,Qingdao University;Weihai Innovation Research Institute of Qingdao University;

【机构】 青岛大学环境科学与工程学院； 青岛大学威海创新研究院；

【摘要】 在烟气前置脱硝和后置湿法脱硫过程中会残留大量的脱硫脱硝尾液,其具有水温较高、氨氮浓度高、盐度高,且C/N较低的水质特点,仅依靠传统脱氮方法很难对脱硫脱硝尾液进行处理,但适合于厌氧氨氧化（ANAMMOX）技术,较高的进水水温（30～40℃）及较低的C/N（<1∶3）有利于ANAMMOX反应的进行,反应的产物硝酸盐氮,与反硝化进行耦合最终去除总氮。相较于传统工艺,厌氧氨氧化与反硝化耦合的新型生物脱氮工艺具有不会产生NO与N₂O等温室气体、曝气量减少、不产生剩余污泥、节省运行成本等优点。综述了尾液水质及pH、盐度等环境因素对耦合工艺脱硫脱硝尾液处理影响,讨论了厌氧氨氧化/反硝化耦合工艺的运行概况,可为火电厂脱硫脱硝尾液处理提供可靠的技术支持。更多还原

【Abstract】 In the process of flue gas pre denitration and post wet desulfurization,a large amount of desulfurization and denitration tail liquid will remain,which has the water quality characteristics of high water temperature,high ammonia nitrogen concentration,high salinity and low C/N.It is difficult to treat the desulfurization and denitration tail liquid only by traditional denitrification methods,but it is suitable for anaerobic ammonia oxidation（ANAMMOX） technology.High inlet water temperature（30 ～ 40 ℃） and low C/N（<1 ∶3） are conducive to anammox reaction.The reaction product nitrate nitrogen is coupled with denitrification to remove total nitrogen.Compared with the traditional process,the new biological denitrification process coupled with anaerobic ammonia oxidation and denitrification has the advantages of NO and N₂O greenhouse gases,reduced aeration,no excess sludge and saving operation cost.This paper summarizes the effects of environmental factors such as tail liquid quality,pH and salinity on the treatment of desulfurization and denitrification tail liquid by the coupling process,and discusses the operation of anaerobic ammonia oxidation/denitrification coupling process,which can provide reliable technical support for the treatment of desulfurization and denitrification tail liquid in thermal power plants.更多还原