中文摘要：

对二级天然沸石曝气生物滤柱的脱氮性能和生物再生进行了实验研究。研究结果表明，在进水有机负荷0．8-6．4kg COD／（m^3·d）、水力负荷1-2m／h、气水比1：1-4：1的工艺条件下，COD、氨氮和总氮去除率分别达到67％-90％、52％-82％和33％～67％；水中氨氮含量在10-30mg／L时，硝化速率为0．23mg／min。生物再生过程中，微生物不仅硝化解吸氨氮，还可以深入沸石孔道，直接利用沸石吸附的氨氮。分级分段进水可以提高沸石生物再生速度，减少再生时间。

英文摘要：

The performance of denitrification in the zeolite biological aerated filter and the biological removal were studied experimentally. The results show that the removal rate of COD is 67 % to 90 %, that of NH3-N from 52 % to 82 %, and that of TN from 33 % to 67 % under the conditions of organic loading 0.8 - 6.4 kg COD/（m^3·d）, hydraulic loading 1-2 m/h, and air to water ratio 1 ： 1-4： 1. The rate of nitrification is 0.23 mg/min under the ammonia concentration of 10-30 mg/L. Bacteria can use the ammonia in zeolite. Grading and partitioning water intake can raise the velocity of bioregeneration and reduce the regeneration time.