溶气析出式浮选柱处理含油废水的试验研究

Research on Processing Oily Wastewater Using an Air Dissolution Releasing Column

针对含油废水中难分离的细粒级油分,结合溶气气浮技术和柱浮选技术的优点,提出利用溶气析出式浮选柱处理含油废水.研制了溶气析出式浮选柱及液位调节装置,建立了一套试验研究系统.采用十二烷基硫酸钠(SDS)为表面活性剂,聚合铝(PAC)、聚丙烯酰胺(PAM)为絮凝剂,通过系统试验,考察了溶气压力、进水pH值、处理量、回流比、泡沫层厚度、表面活性剂以及絮凝剂投加浓度等因素对除油率的影响.试验结果表明,在优化操作参数条件下,除油率可达90%以上.

For the granule oil-bearing wastewater that is difficult to separate, a new device of air dissolution releasing column is developed based on the air dissolution floatation and column floatation. The air dissolution releasing column and hydraulic position adjusting device were exploited, and a set of laboratory test system was set up. With the sodium dodecyl sulfonate (SDS) as surfactant, PAC and PAM as flocculant, the effects of the pressure of air dissolution, pH of wastewater, the oil content of wastewater, the processing capacity of oily wastewater, the ratio of return water, the froth depth, the concentration of flocculant and surfactant on the removal efficiency were systemically studied. The experimental results show that the oil removal efficiency was more than 90% under optimum operation parameters.