M38 Electrodialysis and Electrodialysis Reversal, Second Edition

Are you working with classical electrodialysis (ED) and electrodialysis reversal (EDR)? Meet newly published AWWA Manual M38 Electrodialysis and Electrodialysis Reversal, 2nd Edition. Print and PDF options available. Written for engineers and operators of electrodialysis and electrodialysis reversal systems, this manual provides detailed information on these processes as they relate to water treatment. Its clearly written text explains process principles, equipment information, electrodialysis technology, and system design. An excellent resource for those who use this technology, as well as for those who want to know more about it.

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Electrodialysis (ED) is an electrically driven membrane process used to demineralize or desalinate brackish and saline water. Brackish waters lie under approximately two-thirds of the United States, and some inland rivers, such as portions of the Rio Grande and the Colorado, are also brackish. Water is generally classified as brackish when mineral content ranges between that of fresh drinking water and that of seawater; brackish water contains more than 500 mg/L of total dissolved solids (TDS), and seawater contains more than 30,000 mg/L TDS. ED systems are capable of treating variable source water quality while producing a consistent finished water quality.

According to the Global Water Intelligence (GWI) DesalData website (incorporating the IDA Desalting Plants Inventory), the installed worldwide capacity of ED membrane treatment plants increased from 2 mgd (315 m3/h) in 1955 to more than 200 mgd (31,545 m3/h) in 1992 and more than 758 mgd (119,556 m3/h) in 2019.

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