Full Description

The North Texas Municipal District (NTMWD) experiences seasonal taste and odor(Tcompare the treatment efficiencies for PAC addition at the raw water intake andrapid mix basin; and, evaluate the cost-effectiveness of the four PAC brands.Several researchers have demonstrated that geosmin is more readily removed by PACadsorption than MIB 2, 3, 4. Consequently, MIB was selected for testing to provide aconservative representation of treatment requirements for geosmin removal. The jartesting protocol was designed to simulate contact time and chemical additions at the fullscaleplants.Following jar testing, full-scale tests were conducted at one of the NTMWD watertreatment plants. The objectives of the full-scale tests were to: verify bench-scale testresults and calibrate the bench-scale dose-response curves to full-scale conditions; and,test the effects of sufficient PAC doses on filter headloss. PAC addition was tested at therapid mix basin and with 30 minutes of PCT to simulate addition at the raw water intake.During full-scale testing, filter headloss was measured every two hours to evaluate theimpact of the PAC doses on filter run times. Includes 5 references, tables, figures.

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Edition: Vol. - No. Published: 11/02/2003 Number of Pages: 14File Size: 1 file , 1.5 MB