进水COD及投加方式对A^2O-BAF工艺反硝化聚磷的影响  

Effects of Feed Water COD and Different Adding Ways of COD on Denitrifying Phosphorus Removal of A^2O-BAF Process

作　　者：彭永臻[1] 吕冬梅[1] 王淑莹[1] 

机构地区：[1]北京工业大学北京市污水脱氮除磷处理与过程控制工程技术研究中心,水质科学与水环境恢复工程北京市重点实验室,北京100124

出　　处：《北京工业大学学报》2016年第9期1406-1413,共8页Journal of Beijing University of Technology

基　　金：国家“863”计划资助项目(2012AA063406);北京市教育委员会资助项目(2015ZX07218001)

摘　　要：为了提高系统的反硝化除磷脱氮效率及碳源可利用性,主要研究了进水COD及投加方式对A2O-BAF工艺反硝化聚磷的影响.试验设计了不同的进水ρ(C)/ρ(P)(25~71)及COD投加方式(1次投加、3次投加、连续投加),分别考察各污染物的去除规律.试验结果表明:当ρ(C)/ρ(P)≤34时,A2O中出现磷和硝态氮的累积,去除效果恶化;当45≤ρ(C)/ρ(P)≤59时,磷的去除率稳定在90%左右,出水ρ(P)低于0.5 mg·L-1;当ρ(C)/ρ(P)≥63时,磷的去除率随ρ(C)/ρ(P)的增加而下降.当ρ(C)/ρ(P)≥39时,ρ(C)/ρ(P)的变化对COD和TN去除率影响不大,平均去除率分别高于83%和76%;当ρ(C)/ρ(P)=57时,系统处理效果最佳.相同质量浓度的COD,连续投加的方式可以提高碳源的可利用性,增加厌氧释磷量,提高缺氧反硝化除磷脱氮速率.To improve the denitrifying phosphorus and nitrate removal efficiency and availability of carbon source,the effects of influent COD and different addition methods of COD on the denitrifying phosphorus removal of A^2O-BAF were investigated. Different feed water ρ( C) / ρ( P) ratios of 25-71 and three different addition ways of COD: one-time adding, three-time adding, and continuous adding were designed to study the variations of contaminants,respectively. The results of experiment show that when the ρ( C) / ρ( P) ratio is lower than 34,phosphorus and nitrate are accumulated in A^2O,and the removal efficiency is worse; when the ρ( C) / ρ( P) ratio is 45-59,the P removal efficiency maintains about90%,and the effluent P concentration is lower than 0. 5 mg / L; while the ρ( C) / ρ( P) ratio is higher than 63,the P removal efficiency decreases as the ρ( C) / ρ( P) ratio increases. In contrast,when theρ( C) / ρ( P) ratio is higher than 39,regardless of the ρ( C) / ρ( P) ratio,excellent COD( 90%) and TN( 76%) removal efficiency are maintained throughout the experiments,and when the ρ( C) /ρ( P) ratio are 57,the removal efficiency of the system are optimal. When the COD concentration are the same,the way of continuous adding not only can enhance availability of carbon source,but also increase anaerobicphosphorus release amount and improve denitrifying phosphorus and nitrate removal rate.

关 键 词：A2O-BAF工艺 进水籽(C)/籽(P) 反硝化除磷脱氮 碳源投加方式 

分 类 号：X703.1[环境科学与工程—环境工程]