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This paper addresses the development of a process that is intended to precede andfacilitate the biological degradation of trihalomethanes (THMs) in the treatment train by creating conditionsthat allow nitrifying cultures to flourish in the filters, primarily the destruction ofmonochloramine using granular activated carbon (GAC). The specific goals of thisresearch are as follows:demonstrate the utility of GAC as a suitable media for the reduction ofmonochloramine in packed-bed filters under drinking water treatment plantconditions; and,determine GAC surface properties that control reduction of monochloramine. A series of continuous-flow activated carbon column studies was performed for a suite ofGAC types, source waters, empty-bed contact times (EBCTs), monochloramine influentconcentrations, and pH values. All studies were run until asteady-state condition with respect to monochloramine was achieved. Includes 5 references, tables, figures.

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Edition: Vol. - No. Published: 11/15/2004 Number of Pages: 13File Size: 1 file , 610 KB