A_2N-IC新工艺与A_2N工艺脱氮除磷性能对比研究  

Comparison of Nitrogen and Phosphorus Removal in A_2 N and A_2 N-IC Processes

作　　者：史静[1] 吕锡武[1] 朱文韬[1] 吴义锋[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《湖南大学学报（自然科学版）》2012年第10期73-78,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51078074);江苏省科技支撑计划项目(BS2008667);教育部科学研究重大项目(308010)

摘　　要：为了实现污水中磷的高效去除和磷资源回收,将化学除磷技术与双污泥反硝化聚磷工艺(Anaerobic/Anoxic/Nitration,A2N)结合,开发了新型双污泥反硝化聚磷诱导结晶磷回收工艺(Anaerobic/Anoxic/Nitration-Induced Crystallization process,A2N-IC),并比较了A2N-IC工艺和A2N工艺的脱氮除磷性能.结果表明:在进水总磷(Total Phos-phorus,TP)浓度为5.22～8.31mg/L的情况下,A2N,A2N-IC工艺TP去除率分别为87.4%,99.6%,A2N-IC除磷效率和稳定性明显优于A2N工艺.2种工艺对氨氮的去除效果基本相同,分别为84.8%,84.4%.A2N-IC工艺中化学除磷对生物除磷的辅助是保证该工艺稳定高效运行的主要原因.A2N-IC工艺结晶柱中的主要产物为羟基磷酸钙,鸟粪石在结晶柱中难以形成.To realize effective nitrogen and phosphorus removal and phosphorus recycle, a new system combining chemical phosphorus removal technology and anaerobic/anoxic/nitration （A2N） process was proposed. Experiments were done to compare the characteristics of nitrogen and phosphorus removal in A2N and A2N-induced crystallization （A2N-IC） processes. The results showed that, when the influent to- tal phosphorus （TP） concentrations were 5.22~8.31 mg/L-1 , the TP removal efficiencies of the A2N process and A2N-IC process were 87.4% and 99.6%, respectively. The TP removal efficiency and the sta- bility of A2N-IC process were obviously better than that of A2N process. The ammonia removal efficiencies were 84.8% and 84.4%, and they were nearly the same. The main reason for the high stability and TP re- moval efficiency in the A2 N-IC process was that chemical phosphorus removal provided assistance to the bi- ological phosphorus removal. The product in the induced crystallization reactor was hydroxyapatite. Mag- nesium ammonium phosphate precipitation could not be formed.

关 键 词：双污泥反硝化聚磷诱导结晶磷回收工艺 结晶 反硝化除磷 脱氮 除磷 

分 类 号：X703.1[环境科学与工程—环境工程]