给水厂预氯化工艺处理高藻水的分析研究

Research on the analysis of high algae-laden water treated by prechlorination in water supply plants

以滦河水为处理对象,对自来水厂预氯化—V型滤池+氯消毒工艺各处理单元的出水进行了检测。结果表明,原水经过预氯化处理后,对藻类和叶绿素a的平均去除率分别为31.37%和57.29%;整套工艺对藻类和叶绿素a的平均去除率分别可达78.91%和99.34%。此外,预氯化可有效降低浊度,但对UV254、DOC的去除效果不明显。预氯化后会生成三卤甲烷和卤乙酸,但后续工艺对其有一定的去除作用。

Water in the Luan River has been treated. The effluent from the treating units, such as prechlonnatlon-V-type filter＋disinfection by chlorine in water works, are detected. The results show that after the raw water has been treated by prechlorination,the average removing rates of the algae and chlorophyll-a are 31.37% and 57.29% ,respectively. The average removing rates of the algae and chlorophyll-a can reach 78.91% and 99.34%, respectively by the whole set of technology. Besides ,preehlorination can reduce the turbidity efficiently, but the removing effect by UV254 and DOC are not remarkable. Haloform and haloacetic acid will generate after prechlorination, but it has certain removing effect by the subsequent process.