Flotation is one of the technological processes used in wastewater treatment, which is designed to separate factions that are lighter than liquid. Substances that are lighter than water (for example fat) tend to form a scum on the surface of the water, where they can be easily removed. However, we often want to separate substances with a specific gravity similar to water, which simply float in water, or the time needed to reach the surface is too long. Thanks to the chemical support of the flotation process, fat removal is much more effective.
One of the main elements of flotation is a flotator made of stainless steel, in the upper part equipped with a scraper together with a pipe flocculator where average and previously treated wastewater goes. Effectiveness of flotation depends on the size of air bubbles obtained in the process – the smaller the bubble size, the higher the efficiency of flotation.
The flotation system usually consists of the following elements:
flocculator (mixer to which reagents are dosed)
polyelectrolyte digestion station
sludge collection system
sewage disposal system.