• AWWA JAW11020
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AWWA JAW11020

  • Journal AWWA - Ann Arbor Controls Trihalomethanes
  • Journal Article by American Water Works Association, 07/01/1984
  • Publisher: AWWA

$15.00$30.00


In studying existing treatment process modifications for compliance with the National Interim Primary Drinking Water Regulations for total trihalomethanes (TTHMs), the city of Ann Arbor, Michigan experimented with a variety of disinfection schemes using chlorine and chloramines. Anhydrous ammonia, added to the raw water after prechlorination, reduced TTHM concentrations to the required level of 100 micrograms/L. Both prechlorination-postchlorination and intermediate chlorination-postchlorination were examined also. Details on chlorine residuals using the various chlorination points, maximum potential and instantaneous TTHM formation, and total chlorine residuals throughout the treatment process when ammonia was used are given. Includes 6 references, tables, figures.

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