Aeration
BETE spray nozzles are used, among other things, to expose contaminated water to air. In this way, volatile organic compounds (VOCs) and trihalomethanes (THMs) can be removed by increasing the surface area of the contaminated water that is exposed to air. These unwanted chemicals are removed from the water by diffusion. There are several industries where the use of spray nozzles for aeration is regularly applied, such as municipal water systems and wastewater treatment plants.
Types of aeration spray nozzles
Aeration spray nozzles are used in two different types. In the direct contact type, small droplets are sprayed into a slowly moving air column or above a water reservoir. Due to the large surface area exposed by the small droplets, VOCs and THMs can diffuse more easily from the water into the air. This type benefits from nozzles that produce small droplet sizes, such as the spiral nozzle. Smaller droplet sizes increase the decontamination rate due to the corresponding surface-to-volume ratio.
Water is sprayed from the top of the column onto a layer of loose packing in a packed tower. The packing material is now covered with a thin layer of water that flows down due to gravity. Air is blown up through the packing in counterflow to the water flow. The intricate path that the water and air must follow to pass through the packing creates a large amount of liquid surface area, allowing VOCs and THMs to diffuse into the air. This type of tower benefits from nozzles that provide uniform spray coverage, such as the BETE MaxiPass nozzle. Droplet size is less important in the packed tower type, as the liquid surface area is generated by the packing, not by the spray itself.
Consultancy & customization
We are happy to advise you on the possibilities. We would be glad to see which nozzle is suitable for your aeration needs. Take advantage of the expertise of our specialists who are eager to brainstorm with you. We would be happy to offer you a customized solution. Contact us for advice.
