BAF预处理强化常规饮用水处理工艺效果研究

Effect of BAF-Enhanced Conventional Process for Drinking Water Treatment

以珠江广州段原水为处理对象,研究了"曝气生物滤池(BAF)+常规生物强化"组合工艺的净水效果。结果表明,炭砂滤池是进一步改善水质的重要环节,出水中NH_4^+-N、COD_(Mn)和浊度的平均值分别为0.04、1.02 mg/L和0.25 NTU;相对原水的平均去除率分别为96.8%、61.1%、97.4%;相对沉淀池出水的平均去除率分别为62.7%、31.3%、70.6%。炭砂滤池出水未出现亚硝酸盐积累现象,NO_2^--N的最高值为0.032 mg/L。活性炭丰富的孔隙结构有利于微生物的生长,较大的比表面积增强了对有机污染物的吸附作用;BAF曝气池及沉淀池的跌水作用提高了水中DO的浓度,有利于炭砂滤池中生物氧化反应的进行。

Using Pearl River source water as raw water, the contaminant removal effect of BAF-enhanced biological filtration process was investigated. The results show that the average values of NH4^＋-N ,CODMn and turbidity in the effluent are 0.04,1.02 mg/L and 0.25 NTU. Relating to the effluent of sedimentation tank, the average removal rates of NH4^＋-N, CODMn. turbidity by carbon-sand filter are 62.7 % ,31.3 % ,70.6 %. Carbon-sand filter is believed as the important part for improving the water quality. No accumulation of nitrite was determined in carbon-sand filter, while the highest value is 0.032 mg/L. DO concentration increased after BAF and sedimentation tank, making it more favorable for biodegradation.With large surface area, more space for microorganism is provided and adsorption is strengthened.