水源水生物处理工艺中两种曝气方式的初步比较

比较了穿孔曝气和微孔曝气两种方式的微污染水源水生物接触氧化处理工艺的运行效果。研究表明,微孔曝气方式氧利用率高的特性使其比穿孔曝气方式对水源水中氨氮的去除更为有效。两种曝气方式氨氮去除率均随气水比的增大而升高,气水比大于1.00后,两种曝气方式氨氮去除率趋于一致。由于微孔曝气器易出现堵塞等运行管理问题,大型工程中不宜采用微孔曝气方式。

Comparison between Two Aeration Modes in Biological Process for Treatment of Source Water

Performances of the hole-pipe aeration mode and the micro-pore aeration mode respectively in the biological contact oxidation process for treating micro-polluted source water have been compared. It showed that the micro-pore aeration mode was more efficient than the hok-pipe one for removing ammonia-nitrogen in source water because of higher utilization rate of oxygen produced by the micro-pore aeration mode. The removal efficiency of ammonia-nitrogen increased with enhancement of air-water ratio for each aeration mode, and there moval efficiency of ammonia-nitrogen approached the sameness for both aeration modes after air-water ratio was greater than 1.00. On account of the problems such as blockage happening easily in the micro-aerator, the micro-pore aeration mode is not appropriated for use in the large-scale engineering project.