Page 21 - Simplified Wastewater Treatment Fundementals_Trickling Filters.exe

Trickling Filters

Trickling Filter Problems:

Ponding

Trickling Filters can become backed up due to an excess of zoogloeal mass. This condition

is called Ponding.

Ponding can result in short circuiting and reduced contact time through the impacted filter.

Ponding can be corrected by utilizing a weak solution of chlorine or sodium hypochlorite.

This weak solution can remove the excess zoogloeal mass to allow even percolation

through the Trickling Filter. The excess humus that sloughs off can be collected and

removed from the underdrain system.

Operations need to carefully walk onto the media to pick up debris and to flush areas of

ponding with a hose.

Humus (excess zoogloeal mass) will slough off seasonally as temperatures change in the

spring and fall. Operations must be diligent in keeping the underdrains inspected and

clean.