Full Description

Ion exchange with chloride-form anion resin is recommended as a best available technology for removing nitrate from drinking water. Disposal of spent regenerant brine remains a difficult problem, however. A pilot study focused on a new ion exchange process with batch biological denitrification and reuse of the spent brine. Spent regenerant brine from regeneration of the nitrate-loaded ion exchange column was denitrified in a sequencing batch reactor using methanol as a carbon source. After denitrification, the spent brine was filtered, compensated with NaCl, and reused. Brine denitrification and reuse proved feasible only when using the nitrate-selective trethyl- and tributyl-amine resins. Compared with the conventional ion exchange process, brine reuse reduced the salt consumption and waste discharge by more than 90 percent. Includes 15 references, tables, figures.

Product Details

Edition: Vol. 88 - No. 11 Published: 11/01/1996 Number of Pages: 12 File Size: 1 file , 6.5 MB