In this work, the denitrification was simulated via nitrite at landfill leachate, operating at laboratory scale through a sequencing batch reactor (SBR) adding cane molasses as an alternative external source of carbon. The reasons BODlandfill leachate+molasses / N-NOx studied were 0.37, 4, 12 and 14 with aNOxic reaction time of 4.33 h (BOD/N-NOx=0.37, 4 and 14) and 22 h (BOD/N -NOx=12). The specific rate of denitritation was 0.07 kg nitrite.kg volatile suspended solids (VSS)* day after 4.33 h of aNOxic reaction in tests without the addition of cane molasses and 0.19 and 0.12 kg nitrite.kg-1 VSS*day in the tests with the addition of cane molasses, providing a ratio BOD/N-NOx 4 and 14, respectively. Widening the aNOxic reaction time to 22 h by performing tests on ratio BOD/N-NOx 12, the specific rate of denitritation was increased to 0.55 kg nitrite.kg-1 VSS*day.
leachate; nitrite; denitrification; cane molasses; sequencing batch reactor
