What is the purpose of using air wash during backwashing?

The purpose of using air wash during backwashing is primarily to dislodge trapped particles from the filtration media within the filter system. During the backwashing process, air is injected into the filter, which creates bubbles that help to agitate and loosen any accumulated contaminants, debris, and sediment that have adhered to the filter media. This helps maintain the effectiveness and efficiency of the filtration process by ensuring that the media can continue to perform optimally in removing impurities from the water.

This method is particularly effective because the introduction of air can create turbulence and a flushing action that further aids in the cleaning process. By dislodging these trapped particles, air wash enhances the overall performance of the filtration system, allowing for clearer and cleaner water to pass through the filters after the backwashing process is completed.

Other choices, such as enhancing chemical distribution or reducing energy consumption, do not directly relate to the specific role of air wash in the backwashing process. Similarly, increasing water temperature does not align with the primary function of air wash, which is to physically clean the filter media rather than alter temperature or energy dynamics.