摘要
Abstract
In this research, sequencing batch reactor(SBR) process is used to quickly cultivate aerobic granular sludge by inoculating floc sludge to gradually change the influent composition (the ratio of allocated water and actual domestic sewage). Simultaneously, physical properties of the granular sludge and removal efficiency of the pollutants during the cultivation period are examined. The results show that at the initial stage of cultivation, addition of nutrients and gradual increase of the proportion of actual domestic sewage can quickly cultivate aerobic granular sludge which is basically similar to that developed fully with allocated water. The cultivated aerobic granular sludge is compact in structure and in tawny color, with wet density of 1.046 g/cm³, specific gravity of 1.025, average sedimentation velocity of 38.67 m/h and particle size of about 1 mm. Moreover, the cultivated granular sludge has good pollutant treatment effects and its removal rate of COD and NH -N reaches to 85% and 90% respectively. In the early period of cultivation, addition4 of nutrients into the actual domestic sewage can induce the formation of aerobic granular sludge so as to realize quick cultivation.关键词
SBR反应器/活性污泥/好氧颗粒污泥/城市生活污水/快速培养Key words
SBR Reactor/Activated Sludge/Aerobic Granular Sludge/Urban Domestic Sewage/Quick Cultivation分类
资源环境
