温度对生物活性炭反应器净水效能的影响研究

The Effect Study of Temperature on Water Purification Performance of Biological Activated Carbon reactor

为考察温度变化对生物活性炭反应器净水效能的影响,分别研究了在5-18℃和19-26℃两个温度范围内反应器对高锰酸盐指数、硝态氮、浊度及UV254的去除情况。结果表明:单级生物活性炭反应器对高锰酸盐指数平均值为4.51 mg/L的原水净化能力有限,但常温条件下的效果明显优于低温条件(高锰酸盐指数去除率分别为15.90%和4.38%)。另外,硝态氮的去除也受到低温因素的影响。浊度和UV254在不同温度条件下的去除率没有明显的变化,且UV254随温度的变化表现出明显的滞后性。因此,利用生物活性炭净水装置降低水中高锰酸盐指数和硝态氮时,应避免运行温度降低。在5℃-26℃范围内以降低浊度和UV254为处理目的运行中温度的变化不会明显影响其去除效果。

This experiment investigated the removal of permanganate index, UV254, nitrate nitrogen and turbidi- ty by the biological activated charcoal（BAC） reactor in the temperature of 4 -18 ℃ and 19 to 26 ℃. The result showed that the permanganate index removal ability of BAC was limited which averages were 4.51 mg/L. Per- manganate index removal at common temperatures was better than low temperatures （normal temperaturel5. 90% ,low temperature 4.38% ）. The removal of nitrate nitrogen was also influenced by temperature. Removal of turbidity and UV254 under different stage did not show significant changes, but UV show hysteresis to low temperature effect. Therefore, the lower operating temperature should be avoided to reduce nitrate and perman- ganate index of water using biological activated carbon water purification devices. There is no effective transfor- ming of turbidity and UV254 removal rate temperature chan^ed from 5 ℃ to 26 ℃.