南洲水厂原水长距离输水管道水质变化规律研究

Study on Water Quality Variation in Long-distance Water Delivery Pipeline of Nanzhou Water Treatment Plant

对南洲水厂26.7 km的原水长距离输水管道水质进行了连续6个月的检测研究,结果表明:管道中原水的DO浓度沿程降低,到达净水厂时DO浓度大于2 mg/L;当原水浊度<10NTU时,沿程变化不大,反之,沿程下降明显;氨氮和亚硝酸盐氮浓度在4.6 km处达到峰值,之后沿程降低,最大去除率分别为33%、86%;长距离输水管道对TOC和TP的最大去除率分别为11%、46%。可见,长距离输水管道作为"管道反应器"对原水具有明显的净化作用。

After 6 months of research on 26.7 km long-distance water delivery pipeline of Nanzhou Water Treatment Plant, the results indicated that the concentration of DO in raw water decreased along the path and was above 2 mg/L when the raw water reached the water treatment plant. The turbidity was not obviously changed when the value of raw water was lower than 10 NTU. Conversely, it decreased re- markably. The concentrations of ammonia nitrogen and nitrite nitrogen reached the peak at 4.6 kin, and then decreased along the path. The maximal removal rates of ammonia nitrogen and nitrite nitrogen were 33% and 86% respectively. The maximal removal rates of TOC and TP were 11% and 46% respective- ly. It revealed that the long-distance water delivery pipeline as the pipe reactor has evident purification effect on the raw water.