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This powerpoint presentation begins by providing a brief overview of regulatory drivers and limits for boron. Boron speciation in water is presented, along with second pass alkalization, and feed alkalization. Presentation conclusions indicate the following:First Pass Feed Alkalizationat ambient pH (8.0), only manufacturer A met permeate borongoal of 0.5 mg/L;feedwater alkalinization to pH 9.0 was required for all suppliersto comply boron goal; and,projection models generally conservative estimates.Second Pass Feed Alkalization:pH 10 achieves significant reduction at low NaOH dose; reduces 2nd pass size by 35%; and,projection models generally conservative estimates. Includes tables, figures.

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Edition: Vol. - No. Published: 11/01/2008 Number of Pages: 26File Size: 1 file , 860 KB