From observation of light microscope, SEM and TEM revealed the predominant bacteria of various groups, and element composition of granular sludge was analysed by EDXA.

• 光学、扫描电子显微镜和透射电子显微镜观察揭示出各生理群的优势菌,并用能谱仪对颗粒污泥的元素组成进行了分析。