高铁锰氨氮地下水生物净化滤池的快速启动

为了缩短生物除锰工艺处理高铁高锰高氨氮地下水的启动时间,采用变动回流比、固定回流比、不回流3种启动方式,分别启动3根相同的生物除锰滤柱,考察出水回流对启动时间的影响.实验结果表明,采用3种启动方式3根滤柱出水中的总铁、锰、氨氮分别在51、61、82 d降到了0.3、0.05、0.2 mg/L以下,由此证明回流是加速生物除锰工艺快速启动的有效方式.进一步分析发现,铁主要在滤层的0～0.4 m处去除,锰的去除最初是锰砂吸附,当氨氮降到一定程度后,生物除锰效果迅速提高.回流能够有效缩短高铁锰氨氮地下水的启动时间.

Rapid start-up of biological purifying filter of groundwater containing high concentration of iron and manganese associated ammonia nitrogen

Biological manganese removal process has a problem of long start-up period, when it is adopted to purify groundwater containing high concentration of iron, manganese and ammonia nitrogen. In order to investigate the effect of circulation reflux on start-up, three starting modes with varying reflux ratio, constant reflux ratio and no reflux were adopted in three same filters. Results showed that the total iron, manganese and ammomia nitrogen in effluent of the three filters was below 0.3 mg/L, 0.05 mg/L and 0.2 mg/L on 1,1 and 82 day, respectively; Variation of iron, manganese and ammonia nitrogen removal along the filter showed that the iron was removed mainly in the depth of 0-0.4 m, the manganese was adsorbed by manganese sand at the beginning and biological manganese removal was improved gradually after ammonia nitrogen reduced to be low enough. The circulation reflux is an effective way to shorten the start-up period of biological manganese removal process with high concentration of iron, manganese and ammonia nitrogen.