inside modern wastewater treatment plant. flotation tank with waste water

bacterium basin biofilters blackwater chemical chemically clean cleaning dirty disinfected drain ecology ecosystem effluent engineering environment equipment facility factory filter filtration flotation flow greywater heat industrial industry inside machine metal microfiltration modern overflow pipe pipeline plant pollution pool processing production pump purification purified purity recycle recycled recycling reduce reflection removal sanitary sanitation sedimentation separate separation settle sewage sewer sludge smell station steel store systems tank tanks technology treatment tube turbidity utility valve vat view waste wastewater water