tricking filter in a sewage treatment works

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Size: 5100px × 3413px
Photo credit: © LusoEnvironment / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: cleaning, environmental, percolating, percolation, plant, portugal, portuguese, process, purification, purifying, resource, sewage, tank, trickling, wastewater, water, works, wwtw