Bar Screens

The three main collection system trunk sewers merge at the wastewater treatment plant in Little Ferry in a 40-foot deep chamber. Before further processing, the wastewater entering the plant must be screened to remove rags, glass, rocks, and other large debris. Screening is performed in two separate screening chambers that may be operated independently. The screens consists of vertical steel bars spaced to catch debris of a certain size. Mechanized rakes continuously scrape the screens to remove the debris and deposit the material into hoppers that press the liquid from the material. The screenings are then disposed of as a solid waste. The quantity of screenings increases dramatically during wet weather induced high flows.

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