净化高铁锰伴生氨氮地下水的生物滤池快速启动

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采用生物滤池处理高铁、高锰、高氨氮地下水时,存在启动时间长的问题,鉴于此,采用双层滤料、单层滤料回流、单层滤料不回流三种启动方式同时启动三根滤柱,考察双层滤料和回流对启动时间的影响。结果表明,采用双层滤料或回流均能有效缩短启动时间,三根滤柱出水中的总铁、锰、氨氮分别在第82、81、103天降到了0.3、0.05、0.2 mg/L以下。进一步的分析发现,铁主要在0~0.4 m滤层被去除,锰的去除最初是锰砂吸附,当氨氮浓度降到一定程度后,生物除锰效果迅速提高,锰和氨氮均主要在0~0.4 m滤层被去除。
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