After
conducting several contact time tests, powdered activated carbons
NORIT® GAC 1240 and HYDRODARCO® 4000 had the most success atremoving denatonium benzoate at the 24-hour time period. Both
activated carbons are good treatment methods for removing 5 mg/L
concentrations of denatonium benzoate from water. Batch tests
conducted using higher concentrations of DB; (70 mg/L) concluded that
activated carbon would not be sufficient for the removal of DB from
water supplies. The NORIT® GAC 1240, a bituminous based activated
carbon, performed slightly better than HYDRODARCO® 4000, a lignite
based carbon under all conditions