Strategy for complete nitrogen removal in bioreactor landfills
Abbreviated Journal Title
J. Environ. Eng.-ASCE
SITU AMMONIA REMOVAL; NITRITE ACCUMULATION; OXIDE PRODUCTION; NITRIFICATION; LEACHATE; KINETICS; DENITRIFICATION; OXYGEN; SOIL; TEMPERATURES; Engineering, Environmental; Engineering, Civil; Environmental Sciences
Waste acclimation and batch microcosm studies containing digested municipal solid waste were conducted at different temperatures (22, 35, and 45 degrees C) and gas-phase oxygen concentrations (0.7-100%, by volume) to provide guidance for field-scale implementation of in situ nitrogen removal processes. Results demonstrate that in situ ammonia-nitrogen is feasible in decomposed aerated solid waste environments at the gas-phase oxygen concentrations and temperatures evaluated and the potential for simultaneous nitrification and denitrification in field-scale bioreactor landfills is significant due to the presence of both aerobic and anoxic areas. Small amounts of oxygen were found sufficient for nitrification/ammonia removal to proceed, although removal rates increase with oxygen concentration. Laboratory results suggest field-scale implementation of in situ nitrogen removal occur in small dedicated treatment zones containing previously degraded waste (later in the life of a bioreactor landfill). Model simulations indicate removal of ammonia-nitrogen to low levels can occur with relatively short aeration depths (depth estimates ranged from 1.6 to 7.2 m below the point of leachate injection). Field-scale verification of these depth estimates is required prior to routine acceptance.
Journal of Environmental Engineering-Asce
"Strategy for complete nitrogen removal in bioreactor landfills" (2007). Faculty Bibliography 2000s. 6863.