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Operation and Maintenance
FOG Causing Primary Clarifier Failures(5)
I manage a large treatment plant in Virginia Beach VA. This plant has a large service area, very concentrated household and resaurant/hotel waste, and a very long travel time up to 3 days to get to the plant. All flow is conveyed via force mains. From Mid April through November we have a problem with very thick floating sceptic greasey scum in our primary clarifiers; that if not continuously manually skimmed, will cover the clarifier and completely overwhelm the scum collection system and cause the solids collection flights/chain to jump its guide sprockets and derail in the clarifier.
I am trying to contact other plants that might have this same problem and hopefully learn a few successful ways to either prevent this from happening or actually remove the greasey scum automatically without a lot of manual labor.
Erwin E. Bonatz Jr. P.E.
HRSD Atlantic Treatment Plant Manager
757 821 7402