应对原水突发VOCs污染的应急处理工艺构建

Establishment of emergency water treatment process for Sudden VOCs pollution in raw water

针对水源水突发挥发性有机物(VOCs)风险高的问题.基于水中VOCs易挥发、可吸附的特点.开展了水厂应对原水突发VOCs污染的应急处理工艺研究。通过分析曝气吹脱和粉末活性炭(PAC)对水中VOCs去除的技术特点。对曝气吹脱和PAC吸附进行了技术耦合。在常规处理工艺基础上,通过增设鼓风曝气、PAC投加等设施.构建了以曝气吹脱—PAC吸附耦合技术为VOCs去除核心技术、以常规处理单元为水处理工艺主体、以GAC池为末端安全关口的应急处理工艺。该工艺可实现对突发VOCs污染物的高效去除,具有响应快速、操作灵活、运行稳定、高效经济的特点,可以作为我国大多数水厂应对水源水突发VOCs污染的应急处理工艺。

Based on the volatility and adsorbability of volatile organic compounds （VOCs）, the emergency water treatment process was studied to resolve the problem of sudden pollution of VOCs in raw water. Air stripping was coupled with PAC adsorption by analyzing the characteristics of the two technologies. Emergency treatment process, which used the combining technology of air strip- ping and PAC adsorption as the core, the conventional water treatment process as the main part, and GAC filter as the last safety guarantee, was established by adding the blast aeration and PAC dosing facilities to the conventional water treatment process. This process could achieve efficient removal of VOCs with characteristics of quick response, flexible and stable operation, high effi- ciency, and low cost. It could be used to cope with sudden VOCs pollution in source water for most waterworks in China.