缺氧颗粒污泥特性研究_韩青青

缺氧颗粒污泥特性研究＊韩青青　赵红梅　穗贤杰　彭党聪(西安建筑科技大学　西安710055)　　摘　要　采用SBR反应器在缺氧条件下培养颗粒污泥,并对其理化性质、生物组成以及反硝化活性进行了研究。研究表明,缺氧颗粒污泥的湿密度为1.003-1.021g/cm3;VSS/SS在54%-68%,低于一般的好氧和厌氧颗粒污泥;颗粒沉速在8.4-108m/h,高于普通活性污泥;颗粒污泥表面主要为短杆菌,细菌排列紧密,颗粒表面不平整,内部细菌较少,主要为杆菌,并且分布不连续。颗粒表面和内部均存在孔隙和空穴。缺氧颗粒污泥反硝化活性很好,NOX-N的最大比消耗速率(N/VSS)达到了0.092mg/(mg·h)。　　关键词　SBR　缺氧颗粒污泥　生物组成　反硝化活性StudyonCharacteristicsofAnoxicGranularSludgeinSBRHANQing-qing　ZHAOHong-mei　SUIXian-jie　PENGDang-cong(Xi'anUniversityofArchitectureandTechnology　Xi'an710055)Abstract　Granularsludgeiscultivatedinanoxicconditionusingsequencingbatchreactor.Thispaperstudiedthephysicochemicalcharac-teristics,composingofmicroorganisms,andthedenitrificationcharacteristicsofanoxicgranularsludge.Theresultsshowthatthewetdensityofanoxicgranularsludgeis1.003-1.021g/cm3.TheVSS/SSis54%-68%,lowerthangeneralanaerobicandaerobicgranularsludge.Thesettleabilityis8.4-108m/h,higherthanactivatedsludge.Themicroorganismsaremainlyshortbacillusandarrayedclosely,butthesurfaceisnotsmooth.Therearelessbacteria