不同电子受体对聚磷菌吸磷性能的影响研究  

Effects of electron acceptors on phosphorus uptake of Candidatus Accumulibacter Phosphates

作　　者：郭春艳[1] 徐立杰[1] 李夕耀[1] 袁志国[2] 彭永臻[1] 

机构地区：[1]北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124 [2]澳大利亚昆士兰大学高级废水研究中心

出　　处：《环境污染与防治》2010年第1期5-8,共4页Environmental Pollution & Control

基　　金："十一五"国家科技支撑计划重点项目--SBR工艺城市污水处理厂节能降耗关键技术(No.2006BAC19B03);国家自然科学基金--海外青年学者合作研究基金资助项目(No.50628808);北京市教委科技创新平台项目(No.PXM2008_014204_050843)

摘　　要：采用人工配水,在厌氧/好氧交替运行的序批式活性污泥反应器(SBR)中,富集了全菌数量80%以上的聚磷菌(Candi-datus Accumulibacter Phosphates)。以此为基础,研究了O2及不同浓度NO3--N、NO2--N对聚磷菌吸磷的影响。结果表明,在一定的条件下,聚磷菌可以NO3--N和NO2--N为电子受体进行缺氧吸磷;NO3--N浓度对聚磷菌的吸磷速率影响很小;聚磷菌可以低质量浓度NO2--N(≤40mg/L)为电子受体,但不能以高质量浓度NO2--N(≥80mg/L)为电子受体,而且高浓度NO2--N对聚磷菌吸磷产生抑制甚至对细菌本身存在毒害;NO2--N为电子受体时,其抑制浓度和污泥本身以及外界条件都存在很大的关系,各个研究结论不尽相同,其影响过程有待进一步的探讨。Candidatus Accurnulibacter Phosphates as a well-known phosphate accumulating organisms（PAOs） was incubated in an anaerobic-aerobic SBR reactor using synthetical sewage. During the enriched culture, the sludge with bacterium which content 80 percent of PAOs was obtained, the effects of O2 ,NO3^--N, NO2^--N on phosphate uptake by PAOs was investigated. The results showed that at the appropriate conditions, the phosphorus anoxic remow al by PAOs could be realized with nitrate and nitrite as electron acceptor, initial nitrato concentrations had little effect on denitrification and phosphorus removal rate, while the initial concentrations of nitrite significantly affect the phosphorus removal. Nitrite with lower concentrations （≤40 mg/L） could be used as electron acceptor, but nitrite≥80 mg/L could not be selected as electron acceptor, and higher nitrite concentrations could also inhibit or even poison the bacteria. The inhibit concentrations of nitrite was correlated with external condition and sludge itself, the influence process and mechanism of inhibition need more research.

关 键 词：聚磷菌 电子受体 NO3--N NO2--N 反硝化吸磷 

分 类 号：X703[环境科学与工程—环境工程] X503.225