不同污泥龄条件下多级AO工艺强化生物脱氮性能研究  

CHARACTERISTICS OF ENHANCED BIOLOGICAL NITROGEN REMOVAL IN MULTIPLE ANOXIC AND AEROBIC PROCESSES UNDER DIFFERENT SLUDGE RETENTION TIMES

作　　者：孙月鹏 王火青[2] 孙广垠[1] 吴光学[2] 管运涛[2] 

机构地区：[1]河北工程大学城市建设学院,河北邯郸056000 [2]清华大学深圳研究生院,深圳市环境微生物利用与安全控制重点实验室,广东深圳518055

出　　处：《水处理技术》2014年第10期47-52,57,共7页Technology of Water Treatment

基　　金：深圳市引进海外高层次人才"孔雀计划"项目(KQCX20120814155347053);国家自然科学基金青年科学基金项目(51108242)

摘　　要：在高污泥龄(169 d)和常规污泥龄(9 d)条件下运行多级缺氧好氧(AO)工艺,研究相关强化脱氮性能,为其稳定运行和优化提供参考。长期稳定运行结果表明两种污泥龄条件下,多级AO工艺中出水水质较好,TN去除率分别为63.2%和64.9%。对于硝化菌,污泥龄对氨氧化菌活性影响较小,而主要影响亚硝酸盐氧化菌活性,其中低污泥龄条件下驯化的亚硝酸盐氧化菌活性较低。不同碳源类型反硝化活性研究结果表明,在多级AO工艺中,反硝化主要利用外源碳源和内源碳源,而内源呼吸反硝化在工艺脱氮过程中贡献较小。Two multiple anoxic and aerobic（AO） processes were operated under sludge retention times of 169 d and 9 d, respectively, and characteristics of enhanced biological nitrogen removal was examined so as to provide some clues for stable operation and optimization of the process. Long-term operation showed that the effluent wastewater quality was well under both SRTs, with the total nitrogen removal percentages of 63.2% and 64.9%, respectively.For nitrifiers, sludge retention times did not affect the activities of ammonia oxidizing bacteria, but affected the activities of nitrite oxidizing bacteria with a lower activity occurred at the low sludge retention time. Based on activities of denitrifiers utilizing different types of organic carbons, in the multiple AO process, denitrifiers mainly utilized external and internal organic carbon for nitrogen removal, while endogenous denitrification contributed little to the biological nitrogen removal.

关 键 词：污泥龄 多级AO工艺 内源反硝化 脱氮性能 

分 类 号：X703.1[环境科学与工程—环境工程]