What problem occurs when backwashing an air-bound filter?

When backwashing an air-bound filter, one of the primary concerns is that the media can become suspended in the wash water. This occurs because the air trapped in the filter can disrupt the media bed, leading to the media being agitated and carried away with the water flow during the backwash process.

Backwashing is intended to remove accumulated debris and contaminants from the filter, but if air is present, it can cause uneven water flow and turbulence throughout the media. This turbulence can lift the media and introduce the risk of it being washed out of the filter instead of remaining in place to perform its filtering function.

Ensuring that filters are properly pregenerated and free of air before initiating backwash procedures is crucial to maintain the integrity of the filter media and to ensure effective filtration performance following the backwash cycle.