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Publication Abstract

Evaluation of Wastes from the East St. Louis Water Treatment Plant and Their Impact on the Mississippi River Lin, Shundar, Ralph L. Evans, Donald H. Schnepper, and Thomas E. Hill, 1984  Illinois State Water Survey, Champaign, IL,  ISWS C-160    Full Text Available

Most surface and ground waters are not suitable for human consumption without treatment. About 70 percent of water treatment facilities in the U.S. use the coagulation/sedimentation/filtration process (Westerhoff and Cornwell, 1978). Treatment methods that are auxiliary to these include presettling; iron and manganese removal; aeration and chlorination; softening by lime, soda ash, and ion exchange; taste and odor control by carbon; and chlorination alone.

With the exception of chlorination, each treatment process generates waste (solids or liquids). The waste residue consists mainly of impurities in the form of suspended, colloidal, and dissolved material contained in the raw water. Only small quantities of particulate residue are produced by chemical additions and the resultant chemical reactions.

The type, amount, and characteristics of waste vary considerably depending on the treatment process, raw water quality, pH, water temperature, chemical additions, and season of the year. The principal wastes in water...

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