Screening Screening is the first unit operation used at wastewater treatment plants (WWTPs). Screening removes objects such as rags, paper, plastics, and metals to prevent damage and clogging of downstream equipment, piping, and appurtenances. Some modern wastewater treatment plants use both coarse screens and fine screens. Figure 1 depicts a typical bar screen (a type of coarse screen). Coarse Screens Coarse screens remove large solids, rags, and debris from wastewater, and typically have openings of 6 mm (0.25 in) or larger. Types of coarse screens include mechanically and manually cleaned bar screens, including trash racks. Table 1 describes the various types of coarse screens. Fine Screens
About Long Island. Long Island New York is the largest island adjoining the contiguous United States, extending approximately 118 miles east-northeast from the mouth of the Hudson River. It is separated from the mainland on the north by the Long Island Sound and bounded by the Atlantic Ocean on the south and east.
Long Island is about 130 kilometers long and 6 km wide at its widest point. The land area is 596 kmÂ². Long Island is situated about 265 km southeast of the Bahamian capital of Nassau, which is located on the island of New Providence. The Tropic of Cancer runs through the northern quarter of the island.ong Island is an island in the Bahamas that is split by the Tropic of Cancer.