Activated sludge tank at a wastewater treatment plant.

---

Size: 4000px × 2765px
Photo credit: © Vitantonio Caporusso / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: -, activated, aerated, bacterium, biology, biomass, bubble, cleaning, concrete, factory, industry, machine, micro, organism, pipe, plant, purity, rust, rusty, sewage, slimy, sludge, soap, steel, storage, sud, tank, treatment, tube, unhygienic, valve, wastewater, water