Microscopic analysis on the MBR and AS mixed liquors showed that the MBR sludge was composed of small, uniform-sized flocs;free-swimming bacteria;and few filamentous organisms, nematodes,and ciliates.

• 对MBR和AS混合液进行显微镜分析发现MBR的污泥由小状的、同一粒径的絮体组成，还有一些自由菌，没有发现丝状生物体、纤毛虫和线虫。