进水氨氮浓度对好氧/缺氧/延长闲置SBR脱氮除磷性能的影响  

Effect of influent ammonia concentration on biological nutrient removal in sequencing batch reactor operated as oxic/anoxic/extended-idle regime

作　　者：刘芳芳[1,2] 陈洪波[1,2] 李小明[1,2] 杨麒[1,2] 赵建伟[1,2] 向沙 李娟娟[1,2] 贾利涛[1,2] 

机构地区：[1]湖南大学环境科学与工程学院,长沙410082 [2]环境生物与控制教育部重点实验室(湖南大学),长沙410082

出　　处：《环境工程学报》2015年第12期5775-5782,共8页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51278175;51378188);湖南省研究生科研创新项目(CX2014B140)

摘　　要：以合成废水为研究对象,考察了不同进水氨氮浓度(20,40和60 mg/L)条件下好氧/缺氧/延长闲置SBR的脱氮除磷效果,并通过分析典型周期内氮磷元素及微生物体内各储能物质的变化,探究了进水氨氮浓度对好氧/缺氧/延长闲置SBR脱氮除磷性能的影响机理。结果表明,进水氨氮浓度为20,40和60 mg/L时,系统总磷(TP)去除率分别为96.6%、90.1%和81.8%,总氮去除率分别为93.1%、74.9%和60.0%。研究表明,进水氨氮浓度可影响好氧释磷与吸磷、聚羟基脂肪酸酯(PHAs)合成、缺氧反硝化以及闲置段释磷。进水氨氮浓度越高,用于微生物生长的碳源越多,PHAs的合成量越少,则好氧段吸磷减少;较高的进水氨氮浓度使缺氧段反硝化不彻底,较多的硝态氮将抑制下一周期好氧段释磷,系统脱氮除磷性能减弱。The effects of ammonia concentration（ 20,40 and 60 mg/L） on biological nutrient removal（ BNR） in sequencing batch reactors（ SBR） operated as oxic/anoxic/extended-idle（ O/A/EI） regime were investigated. Nitrogen,phosphorus and intracellular storage polymers were analyzed in a typical cycle,and the mechanism for different ammonia concentrations on BNR performance in the O/A/EI SBR was explored. Experimental results show that 96. 6%,90. 1% and 81. 8% of the total phosphorus（ TP） and 93. 1%,74. 9% and60. 0% of the total nitrogen were removed when ammonia concentrations were at 20,40 and 60 mg/L,respectively. It is also demonstrated that ammonia concentration in influent has impacts on oxic phosphorus uptake and release,polyhydroxyalkanoates（ PHAs） formation,anoxic denitrification,as well as phosphorus release during idle stage. The higher ammonia concentration is,the less carbon source for PHAs synthesis,which usually inhibits phosphorus uptake. Higher ammonia concentration also leads to incomplete denitrification and ultimately reduce BNR performance.

关 键 词：生物脱氮除磷 好氧/缺氧/延长闲置模式 同步硝化-反硝化 后置反硝化 聚羟基脂肪酸酯 糖原 

分 类 号：X703[环境科学与工程—环境工程]