【摘要】 以葡萄糖为碳源,在USB反应器内接种好氧活性污泥在40 d内培养出良好的反硝化颗粒污泥。颗粒污泥形成经历了2个阶段:起始阶段,接种的好氧活性污泥中非反硝化菌逐渐衰亡演变为“惰性固体”,与原有的固体一起,成为反硝化菌附着生长的载体,与此同时,反硝化菌在载体表面渐渐繁殖,形成细颗粒污泥;随后,反硝化菌在细颗粒污泥表面不断增殖,颗粒长大,发育成为成熟的颗粒污泥。成熟的颗粒污泥密实,表面均为杆状菌,且排列紧密,当污泥床容积负荷为19.1 g N/L.d时,去除率高达98.4%(N)。更多还原

【Abstract】 Well-formed denitrifying granular sludge was obtained within 40 days,when aerobic activated sludge was inoculated with glucose as carbon source in USB reactor,that came through two phases: at first,non-denitrifying bacteria in the activated sludge became feeble and died and turned into inert solids,which,along with existing solids in the inoculated sludge,became original carriers for denitrifying bacteria propagating,as well as denitrifying bacteria proliferated on the surface of these carriers and fine granules gradually emerged;then denitrifying bacteria kept on multiplying on the surface of fine granules,so that granule grew up into mature granular sludge in size.Only bacillus aggregated densely on the surface of mature granule and when loading rate of sludge bed was 19.1 g N/L·d,nitrate removal rate was 98.4%.更多还原