化工园区含苯消防废水处理研究

TREATMENT OF FIRE-FIGHTING WASTEWATER WITH BENZENE IN CHEMICAL INDUSTRY PARK

以40 min为限制,讨论了采用错流过滤方式的胶束强化超滤技术对含苯消防废水的去除效果。试验表明,当加入苯的质量浓度为4 g.L-1、蛋白泡沫灭火剂的体积分数为1:640、阴离子表面活性剂十二烷基苯磺酸钠(SDBS)浓度为1 mmol.L-1、pH=7、跨膜压差Δp=0.28 MPa时,苯去除率为88.0%,出水通量达到0.77×10-3 L.m-2.h-1.Pa-1。上述条件下,加入纳米二氧化硅0.75 g.L-1,能使苯去除率快速提高到99.8%,通量达到0.85×10-3 L.m-.2h-.1Pa-1.

The removal of fire-fighting wastewater with benzene in forty minutes was studied.The technology we adopted was micellar enhanced ultrafiltration through the cross-flow filtration.The results showed that： when benzene concentration was 4 g·L-1,anionic surfactant SDBS＇s concentration was 1 mmol·L-1,the volume fraction of protein foam was 1：640,pH 7,Δp =0.28MPa,the permeation flux kept in 0.77×10-3 L·m-2·h-1·Pa-1,and benzene can be removed 94.1%.On this basis,if 0.75 g·L-1 nano SiO2 was added to the fire-fighting wastewater,benzene interception rate would rise to 88.0% in a short time and the permeation flux can reach to 0.85×10-3 L·m-2·h-1·Pa-1.