净水厂应对突发乙苯污染的应急处理中试研究

乙苯是净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乙苯污染的应急处理工艺.结果表明,常规工艺难以去除水中乙苯,向原水中投加粉末活性炭(PAC)与强化常规工艺联用可有效去除水中乙苯,保证处理后水质达到《生活饮用水卫生标准》(GB 5749-2006)要求；PAC与原水混合阶段是乙苯去除的主要阶段,去除率为78.9％～97.4％,强化常规工艺可进一步去除水中低浓度乙苯,颗粒活性炭滤柱作为安全余量,是水质安全保障的最后关口.基于中试结果,给出了应对原水突发乙苯污染时PAC对乙苯的吸附能力.

Pilot study on the water treatment plant emergency treatment of the unexpected ethylbenzene pollution

Ethylbenzene is a high-risk cause for raw water unexpecteel pollution.Pilot experiment was conducted to estimate ethylbenzene removal efficiency of emergency treatment process during the period of ethylbenzene unexpecteel pollution in raw water.Results showed: it was difficult for conventional process to handle ethylbenzene unexpecteel pollution effectively;combination of powdered activated carbon(PAC) with conventional process could remove ethylbenzene effectively,and the produced water could meet the Drinking water sanitary standard(GB 5749—2006);the mixing process of PAC and raw water was the major process for ethylbenzene removal,during which the removal efficiency was 78.9% to 97.4%;enhanced conventional process could further reduce the low ethylbenzene;GAC filter pillar could be used as a safety security,which could be the last process for water quality security.Based on the pilot test results,this paper offered the PAC adsorption capacity of ethylbenzene for unexpected theylbenzene pollution in raw water.