HA-A/A-MCO工艺的除磷效果与除磷菌种群结构  

Removal Effect of Phosphorus and Population Structure of Phosphorus Accumulating Organisms in HA-A/A-MCO Sludge Reduction Process

作　　者：左宁[1] 王图锦[2] 吉芳英[2] 

机构地区：[1]重庆交通大学重庆西南水运工程科学研究所,重庆400016 [2]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《中国给水排水》2012年第7期17-21,共5页China Water & Wastewater

摘　　要：HA-A/A-MCO工艺具有强化脱氮除磷和污泥减量功能,当进水磷浓度为8～12mg/L时,出水磷浓度均值仅为0.44 mg/L,出水水质满足GB 18918—2002的一级A标准。聚磷菌有效释磷1 mg即拥有2.8 mg的吸磷能力,具有很强的超量吸磷潜能,但系统采用外排厌氧富磷污水除磷的方式,磷已先于好氧吸收过程被去除,降低了对聚磷菌超量吸磷能力的要求。采用细菌纯培养法从系统中分离出5株具有典型吸放磷特性的聚磷菌,对其进行16S rDNA扩增和测序比对分析发现,Acinetobacter sp.和Lampropedia sp.等菌种在厌氧释磷过程中占主要优势;Devosia sp.和Bdellovibrio sp.等菌种集中出现在好氧池,是系统好氧吸磷过程的优势菌群;在缺氧池能检测到尚未被培养研究的Uncultured Bacterium等菌群的存在。The HA-A/A-MCO process combines phosphorous and nitrogen removal and sludge re- duction. When the influent TP was 8 to 12 mg/L, the effluent TP was only 0.44 mg/L, which could satisfy the first level A criteria specified in GB 18918 -2002. Phosphorus accumulating organisms （PAOs） showed strong excess phosphorus uptake potential. When PAOs released 1 mg P, they could absorb 2.8 mg P. However, the system realized phosphorus removal through eliminating anaerobic phosphorous accumulating sewage. As a result, phosphorous was removed before aerobic phosphorus uptake process and the excess phosphorus uptake ability of PAOs was not effectively used. By using bacterial pure culture technique, five strains of PAOs with typical phosphorus uptake and phosphorus release performance were separated from the HA-A/A-MCO process. 16S rDNA PCR and sequences analysis of the five PAOs strains indicated that Acinetobacter sp. and Lampropedia sp. dominated in the course of anaerobic phosphorus release. Devosia sp. and Bdellovibrio sp. occurred in aerobic tank, which were the predominant bacteria in the course of aerobic phosphorus uptake. Uncultured Bacterium was detected in anoxic tank.

关 键 词：HA—A/A—MCO工艺 脱氮除磷 污泥减量 除磷菌 厌氧释磷 种群结构 

分 类 号：X703[环境科学与工程—环境工程]