Transcription of Environmental Protection Agency Wastewater Technology …
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Environmental Protection Agency Wastewater Technology …
United StatesEnvironmental ProtectionAgencyWastewater Technology Fact SheetScreening and Grit RemovalDESCRIPTIONW astewater contains large solids and grit that caninterfere with treatment processes or cause unduemechanical wear and increased maintenance onwastewater treatment equipment. To minimizepotential problems, these materials require separatehandling. Preliminary treatment removes theseconstituents from the influent treatment consists of screening, gritremoval, septage handling, odor control, and flowequalization. This fact sheet discusses screeningand grit is the first unit operation used atwastewater treatment plants (WWTPs). Screeningremoves objects such as rags, paper, plastics, andmetals to prevent damage and clogging ofdownstream equipment, piping, and modern Wastewater treatment plants use bothcoarse screens and fine screens.
Grinders consist of two sets of counterrotating, intermeshing cutters that trap and shear wastewater solids into a consistent particle size, typically 6 mm Source: Qasim, 1994. (0.25 in). The cutters are mounted on two drive FIGURE 1 CABLE OPERATED BAR SCREEN
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