沸石强化A/O生物脱氮工艺氨氮去除机理研究  

A study on ammonia removal mechanisms of A/O biological nitrogen removal process with enhancement of zeolite

作　　者：成官文[1] 吴志超[2] 黄翔峰[2] 章非娟[2] 

机构地区：[1]桂林理工大学资源与环境工程系,桂林541004 [2]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境工程学报》2010年第3期540-546,共7页Chinese Journal of Environmental Engineering

基　　金：国家"863"高技术研究发展计划项目(2003AA601020);上海市水务局项目;广西教育厅科研项目(200800ZL032)

摘　　要：沸石强化A/O生物脱氮实验研究表明,沸石对配水氨氮具有良好的吸附性能,其吸附特征可以通过Frend lich和Langmu ir吸附等温线表征,但对污水中氨氮的吸附较配水吸附要复杂。由于沸石能与微生物构成沸石-生物复合体,从而增加了系统的硝化细菌和反硝化细菌数量,改善了A段的反硝化作用和O段的硝化作用。吸附饱和的铵沸石在硝化细菌和电导率的协同作用下,经好氧曝气4.5 h,能再生69.8%。在A段,进水氨氮浓度较高,沸石吸附氨氮,提高污水碳氮比,促进生物反硝化;进入O段,在盐度和微生物的协同作用下,混合液氨氮浓度因为生物降解而逐渐降低,不断打破铵沸石的吸附-脱附平衡,铵沸石不断释放氨氮而得到充分的再生。The pilot scale test of A/O biological nitrogen removal process with the enhancement of the zeolite demonstrated that zeolite had a good absorptive property on the prepared water samples with ammonia.The absorptive characteristics were characterized by the Frendlich and Langmuir adsorption isotherms.The adsorption of ammonia in the sewage was more complicated than the pure water samples that prepared in accordance with the specified proportion in the lab.Because zeolite-biological complex was composed of zeolite and microorganisms,it would increase the number of nitrobacteria and denitrifying bacteria in the system.Furthermore,it would improve denitrification of anaerobic zone and nitrification of oxic zone.The ammonium saturated zeolite was treated under the synergism of nitrobacteria and electrical conductivity with 4.5 h aerobic aeration period.It could be regenerated about 69.8%.Zeolite was acted as the ammonia adsorbent and microbial carrier.When the ammonia concentration of influent was high,zeolite would adsorbe ammonia and increase the C/N of the sewage to facilitate biological denitrification;while in the oxic zone,the ammonia concentration of mixed liquid would be decreased with the biodegradation under the synergism of salinity and microorganisms.Thus,this striked the adsorption and desorption equilibrium of ammonium zeolite,and the ammonium zeolite would be regenerated sufficiently from the constantly released ammonia.

关 键 词：沸石活性污泥法 A/O生物脱氮工艺 脱氮机理 中试研究 城市污水 

分 类 号：X703[环境科学与工程—环境工程]