给水厂应对突发氯苯污染的应急处理中试研究

Emergency Treatment Process for Sudden Chlorobenzene Pollution in Waterworks

氯苯是给水厂原水突发水质污染的高风险物质之一。通过中试研究了应对原水突发氯苯污染的应急处理工艺。结果表明,常规工艺难以去除原水中的氯苯,向原水中投加粉末活性炭(PAC),并与强化常规工艺联用可有效去除水中的氯苯,能保证处理后水质达到生活饮用水卫生标准;PAC与原水混合阶段是去除氯苯的主要阶段,去除率为62.5%～98.9%,强化常规工艺可进一步去除水中低浓度的氯苯,颗粒炭滤柱作为安全余量,是水质安全保障的最后关口。同时基于中试结果,给出了应对原水突发氯苯污染时PAC对氯苯的吸附能力。

Chlorobenzene is one of high risk material causing sudden pollution in raw water. Emergency treatment process for sudden chlorobenzene pollution in raw water was studied in pilot test. The results show that the conventional water treatment process can not remove chlorobenzene from raw water effectively, and PAC adsorption in raw water combined with the enhanced treatment process can guarantee the quality of treated water to meet the requirement of standards for drinking water quality. PAC adsorption in raw water is the main stage for the removal of ehlorobenzene with a removal rate of 62.5% to 98.9%. The enhanced conventional treatment process can further remove low-concentration ehlorobenzene. As a safety margin, granular activated carbon （GAC） filter is the last safety guarantee for drinking water quality. The adsorption capacity of PAC for ehlorobenzene in raw water is estimated based on the pilot test to respond to the sudden ehlorobenzene pollution in waterworks.