Ozone is converted to water in two main ways: bubble dissolution and venturi injection. Both methods aim to achieve optimal transfer of ozone into water, and we will discuss the differences between these ozonizers.
Ozone Generator:At the core of each ozone system is the ozone generator. As can be clearly seen from the information provided, ozone concentration plays a significant role in ozone solubility, thus ozone mass transfer into water. The type of ozone generator you choose will play a crucial role in the transfer of ozone into water.
Ozone can be generated from dry air or oxygen. Since the air supply to an ozone generator only uses oxygen (~20%) from ambient air, the resulting ozone concentration is much lower. Therefore, oxygen-supplied ozone generators always have better ozone mass transfer into water than dry air generators. Most dry air ozone generators produce ozone at a weight of 1.5-3%, while most oxygen-supplied ozone generators produce ozone at a weight of 4.5-10%.
Furthermore, oxygen is more soluble in water than air. Therefore, the ozone itself will be more effectively dissolved in water as a carrier.
Water Temperature:In most applications, we cannot control water temperature. This is just a value we must note and plan accordingly. At higher temperatures, use ozone generators with high concentrations of ozone to overcome this issue. Be careful when increasing water pressure, as increased pressure also increases temperature.
Water Pressure:A water pressure increase from 5 PSIG to 25 PSIG doubles the solubility of ozone. A small increase in water pressure may make a significant difference in the transfer of ozone mass to water in some applications.
Bubble Dispersion Unit:Ozone can be bubbled into water, or in another liquid in a lab system as small as a beacon system, reaching municipal water treatment plants contact ponds. If properly implemented, bubble dispersion units can and do provide adequate ozone mass transfer into liquids.
Venturi System:When using a venturi system, the pressure differential across the venturi tube creates a vacuum that draws ozone into water and effectively mixes it with water. This creates an opportunity for increased water pressure when venturi tube discharge is increased. A higher pressure on the ozone contact tank will result in higher quality transfer of ozone into water (within reason).
