Investigation of oily wastewater treatment process in a flotation set up with ejection system of aeration with disperser

The problem of oily wastewater treatment is considered. The main advantages and disadvantages of ejection system of aeration used for flotation treatment are presented. The importance of the use of mathematical model for the flotation time definition is pointed out. The use of ejection system of aeration with disperser is offered for the intensification of flotation oily wastewater treatment is offered. The mathematical model considering peculiarities of bubble characteristic is developed and experimentally verified. The experiments on a laboratory set up devoted to the investigation of the particles disperse characteristics and kinetics of the treatment were carried out. The bubble size without disperser was about 500 μm, while the use of disperser allows to generate two groups of bubbles with size 55 μm and 105 μm. The experiments showed that the use of the model is possible for the description of the treatment process. The comparison of flotation water treatment efficiencies with and without disperser is presented. The use of disperser is mostly effective for the separation pf particles with size 15-35 μm and allows to increase treatment efficiency from 75% to 90%.