曝气炭砂滤池去除氨氮的生产性示范工程研究

Study on the demonstration production project of aerated GAC-sand filter to remove ammonia nitrogen

通过运行炭层空气曝气活性炭-石英砂双层滤池(简称曝气炭砂滤池)生产性示范工程,并与无曝气炭砂滤池及砂滤池进行对比,研究了曝气炭砂滤池作为快滤池时对水中氨氮及亚硝酸盐氮的去除性能。结果表明,曝气炭砂滤池可将氨氮浓度低于2.5mg/L的进水处理至0.5mg/L以下,且进水氨氮低于1.5mg/L时不需曝气,其去除效果显著优于普通炭砂滤池和石英砂滤池;曝气炭砂滤池亦可有效去除亚硝酸盐氮。用曝气炭砂滤池替代石英砂滤池是水厂提升氨氮去除能力的一种可行的滤池改造方式。

A demonstration production proiect study on the two-layer filter of the aerated granu- lar activated carbon and sand （aerated GAC-sand filter） was carried out and its performance was compared with the performance of no oxyen GAC-sand filter and sand filter. The removal on am- monia nitrogen and nitrite nitrogen was studied when filter. The results showed that the aerated GAC-sand the aerated GAC-sand filter was used as fast filter could reduce the ammonia nitrogen con- centration from below 2.5 mg/L in influent to below 0.5 mg/L; if the ammonia nitrogen in influent was less than 1.5 mg/L, there was no need of aeration and its performance was better than that of ordinary GAC-sand filter and sand filter. The aerated GAC-sand filter could also remove nitrite ni- trogen effectively. Replacing the sand filter with aerated GAC-sand filter was a feasible filter up- grading method to enhance the ammonia nitrogen removal in water treatment plant.