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采用生物除铁除锰滤池处理低温含铁高锰地下水,考察了不同滤速下锰的极限浓度。以滤柱模拟水厂滤池,在水温为5~6℃、溶解氧为8.3~8.5 mg/L、进水总铁为0.5~3.0 mg/L的条件下,当滤速分别为6、7、8 m/h时,锰的极限浓度分别为(8.0~8.5)、(7.0~7.5)、(6.0~6.5)mg/L;进水总铁为12~20 mg/L时锰的极限浓度为(5.0~5.5)、(4.3~4.7)、(3.5~3.8)mg/L。沿程分析发现:随着进水锰浓度的升高,锰的去除带逐渐向下延伸;沿滤层向下一定深度,相同厚度滤料的除锰量逐渐减少;锰浓度升高过程中对除铁无影响。在滤层厚度和温度一定的条件下,锰的极限浓度受进水总铁浓度和滤速的影响,进水总铁浓度和滤速较低时其极限浓度较高。
The bio-iron and manganese removal filter was used to treat the low-temperature iron-bearing high manganese groundwater, and the limit concentration of manganese under different filtration rates was investigated. Under the condition of 5 ~ 6 ℃ water temperature, 8.3 ~ 8.5 mg / L dissolved oxygen and 0.5 ~ 3.0 mg / L total iron inflow, , The limit concentrations of manganese (8.0-8.5), (7.0-7.5) and (6.0-6.5) mg / L at 8 m / h and the limit concentrations of manganese at 12-20 mg / (5.0-5.5), (4.3-4.7), (3.5-3.8) mg / L. Along the course of analysis, it is found that with the increase of influent manganese concentration, the removal zone of manganese gradually extends downward; along the filter layer down to a certain depth, the amount of manganese removal of the same thickness of filter gradually decreases; No effect on iron removal. Under the conditions of certain thickness of filter layer and temperature, the limit concentration of manganese is affected by the total iron concentration and filtration rate of influent, and the higher limit concentration of total iron concentration and filtration rate of influent water is.