序批式反应器的好氧颗粒污泥特性研究

对序批式反应器中好氧颗粒活性污泥的形成过程、处理性能和颗粒分布特性进行了研究。结果表明，不同操作条件下产生了结构形态不同的颗粒污泥，沉降时间是颗粒污泥形成的主要因素，有机负荷对颗粒污泥的结构有一定影响。颗粒污泥反应器对溶解性COD的去除率可达90％，对氨氮的去除率为24％。颗粒污泥在反应器中分布不均匀，反应器底部MLSS高达8g／L，SVI为34mL／g，随着反应器高度的增加则MLSS值降低、SVI值提高；此外较大的颗粒污泥聚集在反应器的底部，较小的颗粒污泥和絮体分布在反应器的中上部。

Characterization of Aerobic Granular Sludge in Sequencing Batch Reactor

The morphology and structure of granulation process of activated sludge, the reactor performance and size distribution of granular sludge were investigated in a sequencing batch reactor. Experimental results indicate that granular sludge with different morphology and structure would be formed under different operating conditions. It is appeared that the settling time of the reactor is the important trigger to granulation and volumetric organic loading rate will influence the structure of granules. The soluble COD removal efficiency is above 90% and ammonia nitrogen removal is 24%. The distribution of granular sludge is unevenly distributed in the reactor, and the MLSS concentration decreases while SVI increases with the increase of reactor height. Larger granules accumulate in the lower part of the reactor while smaller granules and flocs accumulate in the upper part.