The City of Lexington Wastewater Treatment Plant processes an average flow of 3 mgd of municipal wastewater, with a peak flow of 14 mgd.
A HUBER RakeMax (multi-rake) screen was installed in 2021 upstream of the influent pumps and the headworks. The RakeMax replaced one of two old, single rake climber screens that deposited screenings onto a belt conveyor. The remaining climber screen remained for backup.
The existing climber screens were aging and allowed a lot of rag bypass that regularly blocked downstream pumps, which then needed to be manually unblocked. When funds were available the city embarked on a second phase of the project to replace the second climber screen and to replace the belt conveyor with a washing compactor.
They would still experience clogging downstream if the single rake screen needed to be used and the belt conveyor provided no washing or compaction and allowed dirty material to fall on the floor.
Download the case study to read more about the solution and results with the HUBER RakeMax.
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