全自养脱氮颗粒污泥的培养及脱氮性能的恢复与强化  

The cultivation of completely autotrophic nitrogen removal over nitrite granular sludge and the recovery and enhancement of nitrogen removal

作　　者：蔡庆[1] 张代钧[2] 丁佳佳[3] 

机构地区：[1]重庆工程职业技术学院,矿业与环境工程学院,重庆400037 [2]重庆大学环境科学系,重庆400030 [3]重庆市环境科学研究院,重庆401147

出　　处：《中国环境科学》2014年第11期2805-2812,共8页China Environmental Science

基　　金：国家自然科学基金资助项目(51078365);重庆市教委科学技术研究项目(KJ1403202)

摘　　要：采用交替限氧-厌氧和低充放比(30%)运行模式,在SBR反应器中成功启动全自养脱氮(CANON)工艺,启动过程经历常规硝化主导阶段、短程硝化主导阶段和全自养脱氮阶段,总氮去除速率和总氮去除效率分别达到(312±15)mg/(L·d)和(71.2±4.3)%.培养得到的污泥中颗粒污泥(粒径≥300μm)和絮状污泥(粒径<300μm)体积分别占污泥总体积的39%和61%.在自养脱氮性能恶化的SBR反应器进水中长期添加适量N2H4,反应器脱氮性能得以恢复甚至强化,反应器总氮去除速率升高到(480±34)mg/(L·d),颗粒污泥的比例增加到污泥总体积的51%.Complete autotrophic nitrogen removal over nitrite （CANON） process was successfully startedup with a low volumetric exchange ratio （30%） under alternative limited-oxygen/anaerobic mode in SBR, and the total nitrogen removal rate as well as the total nitrogen removal efficiency reached （312±15）mg/（L·d） and （71.2±4.3）%, respectively. The startup of CANON SBR experienced nitrification-leading phase, partitial-nitritation-leading phase and CANON phase in general Granular biomass and floccular biomass were both found in SBR. The volume of granular biomass （radius≥300μm） and floccular biomass （radius〈300μm） made up 39% and 61% of total sludge volume, respectively. The long-term N2H4 addition recovered and enhanced their autotrophic nitrogen removal capacity, with the total nitrogen removal rate increased to （480±34）mg/（L·d）. The proportion of granular biomass increased to 51% of total sludge volume.

关 键 词：全自养脱氮 颗粒污泥 N2H4 恢复 强化 

分 类 号：X703[环境科学与工程—环境工程]