1 electrolytic air flotation
Electrolytic air flotation introduces the principle of positive and negative electrodes in physics into sewage treatment, that is, the relevant staff put the positive and negative electrodes into oily sewage, turn on the power supply, and use the principle of electron repulsion and attraction to make them undergo electrolytic reaction. The reaction process is accompanied by the generation of gas, which has a certain adsorption effect and can combine oil beads with impurities. Finally, these substances combine to form oil residue, which floats to the surface of sewage. After that, the staff can remove most of the garbage in the sewage by using simple slag scraping tools, and finally ensure the cleaning ability and effect [1].
2 induced air flotation
Induced air flotation is a measure to discharge pollutants by means of instruments and equipment. Power on the equipment after it enters the water. With the help of the vibration and stirring of the instrument, the slightly larger bubbles are successfully divided into many small bubbles. When bubbles reunite, it will drive the adhesion of stains and improve the efficiency of oily sewage treatment. Therefore, this measure, also known as air distribution flotation, is widely used because of its simple operation steps.
3 dissolved air flotation
There are two kinds of dissolved air flotation, one is vacuum dissolved air flotation and the other is pressure dissolved air flotation. The former means that workers apply negative pressure to oily sewage through vacuum operation, so that the bubbles in the sewage are decomposed into tiny bubbles, and then the oil pollution is separated according to the above principle. Based on the general characteristics of oily sewage with water, the latter increases the pressure of oily sewage according to the characteristics of great difference in bubble solubility under different pressures, and finally realizes the purpose of miniaturization of bubbles.
4 biological air flotation
Biological air flotation is a measure that combines the knowledge theory of biology and chemistry with air flotation. Technicians first analyze the main components of sewage with the help of particle analyzer, spectrometer and Popper characteristic diagram. Secondly, biochemical engineers calculate the concentration of sewage and count the concentrations of different heavy metal ions. Finally, according to the principle of chemical reaction, such as precipitation reaction, the relevant staff can chemically react the ions polluted by sewage, reduce the concentration through ion precipitation, and use the tiny gas generated in the reaction to adsorb other impurities, thus speeding up the efficiency of sewage treatment.