【摘要】 对城市污水处理厂曝气池中筛选出的好氧颗粒污泥进行了分析.结果表明,这些颗粒污泥的直径主要在0.2~0.8mm范围;平均圆度为1.29;沉淀速率约在10~42mh-1之间;比耗氧速率(SOUR)为14.2~18.9mgg-1h-1,小于活性污泥;挥发性物质占总固体的量与活性污泥基本相似.这些颗粒污泥占污泥总量的0.1%~0.5%.颗粒污泥的激光共聚焦扫描显微镜(CLSM)图像显示:颗粒污泥内部几乎都由胞外聚合物(EPS)组成;细菌主要分布在颗粒污泥表面至100μm厚度区域,少部分分布在100~400μm厚度区域.图6表1参13更多还原

【Abstract】 An analysis on the samples of aerobic granules selected from a municipal wastewater treatment plant shows that the diameters of the granules fall mainly within the range of 0.2~0.8 mm, their average roundness is 1.29, free settling velocities range from 10 to 42 m h-1 and specifi c oxygen uptake rate (SOUR) is from 14.2 to 18.9 mg g-1 h-1, which is lower than that of activated sludge. The aerobic granules and floc activated sludge have similar VSS/SS. The weight percentage of the aerobic granules in total biomass ranges from 0.1% to 0.5%. The images taken by CLSM (Confocal laser scanning microscope) indicate that the granules mainly consist of extracellular polymeric substance (EPS) in the core and the bacteria in the granules are found most at depth between 0 and 100 μm below the surface, while a few between 100 and 400 μm. Fig 6, Tab 1, Ref 13更多还原