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强化生物除磷系统的微生物学及生化特性研究进展

DOI: 10.3724/SP.J.1145.2011.00427, PP. 427-434

Keywords: 强化生物除磷,聚磷菌,聚糖菌,反硝化聚磷菌,还原力

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Abstract:

综述了强化生物除磷(enhancedbiologicalphosphorusremoval,ebpr)系统的微生物学和生化特性两方面的最新研究进展.在微生物学方面,归纳了ebpr系统中的主要微生物――聚磷菌、聚糖菌、反硝化聚磷菌的分类及相互之间的竞争和联系.具有聚磷功能的微生物种类繁多,目前普遍认为accumulibacter是一种典型的聚磷菌,在各种规模的ebpr系统中均不同程度的存在.关于聚磷菌和聚糖菌的联系、反硝化聚磷菌的分类问题存在争论.在生化特性方面,归纳了聚磷菌体内三大聚合物――糖原、聚β-羟基烷酸脂和聚合磷酸盐与聚磷菌代谢功能的关系.聚磷菌厌氧阶段的还原力由糖酵解和有机底物tca循环共同提供,其比例受种群结构和实验条件影响.糖原根据不同菌株厌氧阶段的降解途径有所不同,但是对细胞都起到调节氧化平衡的作用.聚β-羟基烷酸脂的组成由有机底物决定,丙酸为底物时4种单体均可检测出来.聚磷菌厌氧释磷的能量来自聚磷分解和糖原分解,耗能受环境条件影响.图5表3参37

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