中文摘要：

在SBR反应器中，以絮状污泥为接种污泥、醋酸钠为碳源，利用逐渐缩短沉淀时间的水力选择方法培养具有反硝化功能的颗粒污泥。研究结果表明：反应器运行30d时，获得成熟的反硝化颗粒污泥，该颗粒污泥颜色为淡黄色或白色、平均粒径为0．2mm、沉速在15～25m／h之间，反应器中污泥的SVI值在50mL／g以下；反应器运行50d期间，对氮的去除率在95％以上，对COD的去除率在90％左右，颗粒污泥最大反硝化速率高达69．54mgN／（g·h），该颗粒污泥反应器具有较强的脱氮能力。

英文摘要：

Using flocculent sludge as seed sludge and sodium acetate as carbon source, the deni- trifying granular sludge was was formed on the 30＇h day. cultivated by the hydraulic choice in SBR. The denitrifying granular sludge The granular sludge was pale yellow or white, the mean diameter was 0.2 mm, the settling velocity was between 15 m/h and 25 m/h, and the SVI was below 50 mL/g. During the 50 d running, the removal rates of nitrogen and COD were over 95% and about 90%, respectively, and the maximum denitrifying rate was up to 69.54 mgN/（ g.h）. The granular sludge reactor had strong ni- trogen removal capability.