为提高曝气生物滤池(B A F)处理废水的效率,以沸石、活性炭、建筑陶粒、工程陶粒作为填料
测试气体流速、水力停留时间( H R T)、进水有机负荷对生物滤池的化学需氧量( C O D)、N H 3—N 的去除效
果及出水浊度的影响。结果表明:在水力停留时间为1.5 h、进水C O D 为150 m g/L、有机负荷为2.41 kg
C O D /(m 3·d)时,两种陶粒出水C O D 均小于25 m g/L;当进水有机负荷为0.74 kg C O D /(m 3·d)时,工程陶粒
出水C O D 小于10 m g/L;工程陶粒是曝气生物滤池填料的最佳选择。
A dry-regenerative adsorption process for the simultaneous removal of sulfur dioxide and nitrogen oxides from power plant flue gases was investigated. Alkalized alumina was used as the adsorbent in a radial flow fixed bed reactor
at a space velocity of 2000 h-1 and temperatures between 100 and 150 ^C. Breakthrough curves and temperatures were measured at the reactor outlet and at several points within the reactor. The process is appreciably exothermic and strong interaction between NO and SO2 uptake is apparent. Adsorbent saturation capacity and the rate of adsorption for SO2 are affected by NO presence. The adsorbent does not show appreciable loss of activity upon repeated regeneration with H2 at 600 ^C. A diffusion-controlled shrinking core model was used to interpret SO2 breakthrough curves and evaluate pertinent rate parameters.