投加聚合铝铁对A^2O系统脱氮除磷效能的影响及机制  

Effects and Mechanisms of Polymeric Aluminum-Iron Added of Aeration Tank in A^2O Systems for Phosphorus and Nitrogen Removal

作　　者：李斯亮[1,2] 魏亮亮[1] 赵庆良[1] 陈志强[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]黑龙江省住房和城乡建设厅,黑龙江哈尔滨150001

出　　处：《环境科学研究》2014年第10期1212-1218,共7页Research of Environmental Sciences

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07201003);中国博士后特别资助项目(2013T60375)

摘　　要：为研究A2O污水处理系统聚合铝铁投加对污水中TP的强化去除及对其他污染物的协同去除,通过小试试验对比研究了聚合铝铁分别在A2O系统曝气池前端和末端投加时各污染物的去除特征.结果表明,与前端投加相比,聚合铝铁在曝气池末端的投加能够显著提升系统对污水中TP和NH4+-N的去除率,但聚合铝铁末端投加时系统出水中ρ(NO3--N)高于前端投加.结果表明,聚合铝铁投加量〔以ρ(Al)计〕为4 mgL时去除效果最好,此时系统对CODCr、TN、NH4+-N、TP的去除率分别为93.3%、64.6%、83.6%和97.6%,出水中ρ(CODCr)、ρ(TN)、ρ(NH4+-N)和ρ(TP)分别为19.8、15.3、6.1和0.2 mgL.另外,在10℃下运行时,聚合铝铁对生活污水中TP及NH4+-N的去除更为有效.In order to enhance the removal rate of phosphorus and nitrogen during the operation of A2 O systems,the addition of polymeric aluminum-iron（ PAFC） at the front and end of the aeration tank was studied via the construction of a lab-scale A2 O reactor. Experimental results demonstrated that the addition of PAFC at the end of the aeration tank showed a much higher TP and NH4＋-N removal efficiency compared with addition at the front of the tank,but it showed a lower removal efficiency of NO3--N. The optimal PAFC dosage was4 mgL at the end of the aeration tank,which would lead to effluent contents of CODCr,TN,NH4＋-N and TP of 19. 8,15. 3,6. 1 and0. 2 mgL,representing removal rates of 93. 3%,64. 6%,83. 6% and 97. 6% respectively. In addition,PAFC showed a higher removal ability of TP and NH4＋-N,especially for operation at low temperatures.

关 键 词：生活污水 A2O 聚合铝铁 投加方式 脱氮除磷 

分 类 号：X703[环境科学与工程—环境工程]