title: Monitoring the removal of nitrogen by applying a nitrification-denitrification process in a Sequencing Batch Reactor (SBR).
abstract: In this study the evaluation of nitrogen removal in wastewater from a meat products processing company was performed, using a Sequencing Batch Reactor (SBR) at pilot scale. The phases of the SBR operation were: filling, reaction (aeration and intermittent anoxia), sedimentation and discharge. In each of these phases analyses of ammonium (NH(4)(+)), nitrite (NO(2)(-)), nitrate (NO(3)(-)), pH and dissolved oxygen (DO) were carried out to monitor the process of nitrification-denitrification. The results showed that stage IV had the best performance (2.49 g COD(F)/Ld and 1.02 g NH(4)(+)-N/Ld) with a NH(4)(+)-N removal of 71%. The transformation of much of the NH(4)(+)-N to gaseous nitrogen was confirmed, with the concentration of NO(2)(-)-N and NO(3)(-)-N increasing during the reaction phase but decreasing in the effluent due to its transformation to gaseous nitrogen.
authors.affiliation: University of Antioquia, Laboratory Diagnostics and Pollution Control (GDCON), Medellin, Colombia. catasaxo@gmail.com
authors.forename: Diana Catalina
authors.initials: DC
authors.lastname: Rodríguez
authors.forename: Nancy
authors.initials: N
authors.lastname: Pino
authors.forename: Gustavo
authors.initials: G
authors.lastname: Peñuela
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D001420:Bacteria, Aerobic / Q000502:physiology*; D019149:Bioreactors / Q000382:microbiology*; D003198:Computer Simulation; D008954:Models, Biological; D058465:Nitrification / Q000502:physiology*; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D000641:Ammonia; D009584:Nitrogen