污染原水粉末活性炭应急处理的研究

Study on Emergent Treatment of Raw Water Using Powdered Activated Carbon

针对上海某水厂的水源现状，开展了水质受常规有机物污染以及模拟突发性有毒有害物质污染等条件下投加粉末活性炭应急处理的研究。结果表明，煤质粉末炭即可发挥净化功能，在吸水井投加20～30mg／L既能取得最佳的吸附效果，又经济可行；粉末活性炭在低投加量时有促进混凝沉淀的作用，投加量达到50mg／L，沉后水的颗粒物数量增加30％左右，可能不利于后续过滤；投加粉末活性炭对原水预氯化有一定影响。

Aim at the status of water source of a water work in Shanghai, this study was conducted to add powdered activated carbon （PAC） for emergent treatment of conventional organic pollution as well as accidental toxic pollution of water quality by simulation. The results showed that the powdered carbon of coal were available for water purification. The optimum adsorption and economic feasibility could be got when the dosage was 20 - 30 mg/L at suction well It was helpful for coagulation sedimentation when the PAC dosage was low. However, if the PAC dosage came to 50 mg/L or more, the particles in settled water would be more than usual by 30%, which was unfavorable of sequential filtration. Addition of PAC had certain influence on prechlorination of raw water.