CAJ | 학술논문

强化A~2O工艺中的反硝化除磷比例,是提高该工艺处理低C/N比污水时脱氮除磷效率的有效途径.采用52.5 L的A~2O反应器处理实际生活污水,研究了系统在不同的反硝化除磷比例情况下微生物的种群变化及关系.试验结果表明,随着水质条件及运行状态的改变,系统反硝化除磷的比例也在变化,同时微生物种群结构表现为一种动态的演替过程,工艺条件与微生物的种群结构具有很强的映射关系.测序结果表明,具有传统除磷功能的Acinetobacter在系统反硝化除磷得到强化的时候会逐渐被淘汰,而Uncultured Chlorobi bacterium会逐渐得到增殖,可能是系统中具有反硝化除磷功能的微生物.
강화A~2O공예중적반초화제린비례,시제고해공예처리저C/N비오수시탈담제린효솔적유효도경.채용52.5 L적A~2O반응기처리실제생활오수,연구료계통재불동적반초화제린비례정황하미생물적충군변화급관계.시험결과표명,수착수질조건급운행상태적개변,계통반초화제린적비례야재변화,동시미생물충군결구표현위일충동태적연체과정,공예조건여미생물적충군결구구유흔강적영사관계.측서결과표명,구유전통제린공능적Acinetobacter재계통반초화제린득도강화적시후회축점피도태,이Uncultured Chlorobi bacterium회축점득도증식,가능시계통중구유반초화제린공능적미생물.
Enhanced denitrifying phosphorus removal in anaerobic-anoxic/oxic (A~2O) process is an effective way to increase the removal efficiency of nitrogen and phosphorus when treating low C/N ratio domestic wastewater.In this study,a 52.5L pilot-scale reactor,based on plug-flow A~2O configuration,was used to treat domestic wastewater.In addition,the microbial population variation was investigated by polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE).The results showed that the microbial community structure and dominant bacteria changed with the variation of wastewater quality and operating parameters.The dynamic change of microbial population was consistent with the variation of operation.Sequence results of DGGE bands showed that the dominant bacterial community in the system was Proteobacteria.Acinetobacter may be responsible for the traditional biological phosphorus removal in the system,but it disappeared gradually with the enhancement of denitrifying phosphorus removal.Uncultured Chlorobi bacterium increased with the enhancement of denitrifying phosphorus removal and it might be the major denitrifying phosphate accumulating organisms (DPAOs) in the system.