两级内循环浮选处理三元复合驱污水

利用两级内循环浮选技术处理三元复合驱污水，考察了PAM质量浓度、SDBS质量浓度、污水温度、供气量、pH值和水力停留时间对油-水分离的影响。利用显微镜成像技术分析油粒数量随时间的变化规律。结果表明，PAM的存在能够减小SDBS对油-水分离性能的影响，提高油去除率。三元复合驱污水温度和初始油浓度对油去除率影响较小，而污水pH值、供气量和水力停留时间的影响较大。当pH＞9.5、供气量为1.5~2.0 m3/h和水力停留时间2.0 h时，三元复合驱污水油去除率较高，达到85％以上。显微镜成像显示，油粒直径在3.0~15.0 μm范围，水力停留时间前1.0 h中污水中油粒数量减少较多，而后1.0 h中减少缓慢。

Alkali-Surfactant-Polymer Flooding Wastewater Treatment by Two-Stage Internal Circulation Flotation

Alkali-Surfactant-Polymer flooding wastewater treatment was studied by two-stage internal circulation flotation.Influencing factor of oil-water separation was discussed in detail,such as PAM and surfactant concentration,temperature,air flow rate,pH value and hydraulic retention time.The number of emulsified oil particles change with time was analyzed by Microscopy imaging technology.The result showed that PAM could reduce the effect of surfactant on wastewater characteristic,and improve the efficiency of oil-water separation.Temperature and the initial oil concentration had little effect on oil removal rate,but other factors had significant effect.When the pH value was more than 9.5,air flow rate of 1.5-2.0 m3/h,hydraulic retention time 2.0 h,the oil removal rate could reach its highest value of 85.0% or more.Microscopy imaging showed that the oil particle diameter in the wastewater was in the range of 3.0-15.0 μm.The number of oil particles reduced faster in the first one hour of hydraulic retention time than in the second one hour of hydraulic retention time.