A rotary filter skims scum from the surface of waste water in a settling tank at a water treatment plant.
A rotary sweeping trickling filter skims lightweight solids from waste water over a bed of aerobic bacteria zoological slime in a settling tank at a water treatment plant in Fountain Valley CA
Size: 5120px × 3413px
Location: California
Photo credit: © Marmaduke St. John / Alamy / Afripics
License: Royalty Free
Model Released: No
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