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反冲洗周期对生物除锰滤池去除效果的影响

Keywords: 生物除锰,浊度,反冲洗周期,,,氨氮

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Abstract:

反冲洗周期是生物除铁除锰滤池的一个重要运行参数,实验中分别设定反冲洗周期为24、48和72h,考察反冲洗周期对成熟稳定运行的滤柱出水铁、锰、氨氮和浊度的影响。结果表明,不同反冲洗周期,滤柱对铁、锰和氨氮均有很好的去除效果,出水中的总Fe、Mn2+和NH4+-N的平均浓度分别为0.018、0.003和0.016mg/L,0.010、0.001和0.014mg/L,0.013、0.001和0.014mg/L,均远低于国家标准,说明反冲洗周期变化对三者的去除效果没有影响。反冲洗周期为24、48和72h时,出水平均浊度分别为0.27、0.38和0.57NTU,反冲洗周期越长,出水浊度越高。滤柱沿程浊度分析发现,浊度主要在0~0.4m去除,出水浊度与滤层厚度无关。反冲洗后5min出水浊度为3.16NTU,15min降到了1NTU以下,25min降到了0.5NTU,60min大约降到了反冲洗前的水平。

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