双室(层)曝气生物滤池充氧性能及流态特征  

Oxygen transfer efficiency and flow pattern in double-chamber aerated biological filter

作　　者：崔燕平[1] 田文华[2] 文湘华[2] 钱易[2] 

机构地区：[1]中国矿业大学化学与环境工程学院,北京100083 [2]清华大学环境科学与工程系环境模拟与污染控制国家重点实验室,北京100084

出　　处：《给水排水》2004年第8期41-44,共4页Water & Wastewater Engineering

摘　　要：研究了双室 (层 )曝气生物滤池 (DBAF)的充氧性能和流态特征 ,结果表明氧传质系数与曝气强度成正比 ,加滤料前后氧传质系数的差别与曝气强度的大小有关 ,曝气强度较低时 ,两者相差4 0 % ,随着曝气强度的增加 ,两者逐渐接近。DBAF可用n值为 8～ 10阶式CSTR描述 ,流态接近推流式反应器。降低水力负荷和增大滤料高度时 。The oxygen transfer efficiency and flow pattern of the renovated double-chamber aerated biological filter (DABF) are studied. The results show that the mass transfer coefficient for oxygen displays a good linear relationship with aeration intensity, and the difference of mass transfer coefficient for oxygen between empty and packed bed is affected by the aeration intensity. Their difference is near 40% when the aeration intensity is very low, and decreased when the aeration intensity increased. The CSTR number of DABF is between 8 to 10, so that it can be considered as a plug flow reactor. Decreasing the hydraulic loading and increasing the height of the media make the flow pattern approach more to plug flow.

关 键 词：曝气生物滤池 充氧性能 氧传质系数 流态 滤料 

分 类 号：TU991.24[建筑科学—市政工程]