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.
To the north of the island is Long Island Sound, which separates it from the coast of Connecticut and Rhode Island. To the south are the Great South Bay, South Oyster Bay, and Jamaica Bay, which are actually lagoons, protected from the Atlantic Ocean by a string of narrow barrier islands, most notably Fire Island.he counties of Nassau and Suffolk have long been renowned for their affluence. With the median price of houses at $500,000 USD, Long Island has a very high standard of living rate with residents paying some of the highest property taxes in the country.