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How Wastewater Treatment Works...The Basics Author: US EPA, OW, OWM, Water Permits Division Subject: This fact sheet describes the basic functions of wastewater treatment and the two stages in treatment of wastes -- primary and secondary (EPA 833-F-98-002) Keywords
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How Wastewater Treatment WorksThe Basics. treatment to remove nutrients and other contami-nants. Secondary Treatment The secondary stage of treatment removes about 85 percent of the organic matter in sewage by making use of the bacteria in it. The principal secondary treatment techniques used in secondary treatment are the trickling filter and
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How Wastewater Treatment WorksThe Basics US EPA. Primary Treatment As sewage enters a plant for treatment, it flows through a screen, which removes large floating objects such as rags and sticks that might clog pipes or damage equipment. After sewage has been screened, it passes into a grit chamber, where cinders, sand, Get price; LJTS
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