The "filters" were not trickling filters, but sand filters for the removal of suspended solids. The backwash was sent to the clarifiers (not aeration basins) for solids settling. This was probably a water filtration plant, not a biological wastewater treatment plant.
Published by Tom Eckhoff, Principal at Arrigetch Environmental Consulting LLC
The "filters" were not trickling filters, but sand filters for the removal of suspended solids. The backwash was sent to the clarifiers (not aeration basins) for solids settling. This was probably a water filtration plant, not a biological wastewater treatment plant.