The treatment effect of Air flotation Equipment is affected by many factors, mainly including the following aspects.
1. Water quality characteristics
Pollutant properties: The size, shape and density of suspended particles in water have a significant impact on the flotation effect. Large particles and particles with low density are more likely to combine with bubbles and float.
Pollutant concentration: When the pollutant concentration is too high, the bubbles may not be able to fully contact all the pollutants. For example, when treating high-concentration oily wastewater, if there are too many oil droplets and relatively insufficient bubbles, some oil droplets will not be carried up, affecting the quality of the treated water.
2. Bubble characteristics
Bubble size: Small and uniform bubbles are conducive to flotation. Small bubbles have a large specific surface area and are more likely to come into contact with pollutants. Generally speaking, the flotation effect is better when the bubble diameter is 20-50μm. If the bubble is too large, it will have strong buoyancy but will easily break, and the combination with the particles will be unstable.
Bubble quantity: Sufficient bubble quantity is the key to ensure the flotation effect. The bubble quantity is mainly determined by the dissolved air system. Sufficient bubbles can only be generated when the dissolved air pressure and dissolved air water flow are appropriate.
3. Process parameters
Dissolved air pressure and time: Dissolved air pressure affects the amount of air dissolved in water. Appropriate dissolved air pressure and time can produce enough dissolved air water. Too high pressure or too long time may cause bubbles to be too large; too low pressure or too short time will cause insufficient air dissolution and a small number of bubbles.
Hydraulic retention time: In the flotation tank, it takes a certain amount of time for the pollutants to fully combine with the bubbles and float up. If the hydraulic retention time is too short, the flotation reaction will not be complete, and some pollutants will remain. Generally, the hydraulic retention time is more appropriate between 15 and 30 minutes.
4. Equipment factors
Flotation tank structure: The shape, size and internal structure of the flotation tank will affect the water flow state and bubble distribution. A good flotation tank structure should avoid water short circuits and dead corners to ensure that sewage and bubbles are fully mixed.
Equipment operation status: The normal operation of the dissolved air system, scraping system and other equipment is crucial. Failure of the dissolved air system will cause abnormal bubbles, and failure of the scraping system will prevent the scum from being removed in time, thus affecting the flotation treatment effect. At the same time, regular maintenance and cleaning of the equipment are also important. For example, blockage of the dissolved air releaser will affect the release of bubbles and reduce the flotation efficiency.
If you are interested in the factors that affect the treatment effect of High Efficient Air Flotation Equipments and are eager to explore the mystery, you are welcome to contact Wanchuan Environmental Equipment Technology. We have a highly professional team with rich experience and deep expertise in the field of air flotation technology.
