title: Pilot-scale comparison of two hybrid-passive landfill leachate treatment systems operated in a cold climate.
abstract: Hybrid-passive landfill leachate treatment systems employ active pretreatment to remove dissolved inorganic constituents and decrease the oxygen demand of the leachate prior to treatment in a passive system. In a 1-year pilot-scale study, two passive treatment systems - a peat and wood shaving biological trickle filter and a sand and gravel constructed wetland - were installed to treat leachate from the Merrick Landfill in North Bay, Ontario, Canada. Leachate was pretreated in a fixed-film aerobic reactor, which provided reductions in COD (26%), and masses of ammonia (21%), Al (69%), Ca (57%), Fe (73%) and Sr (37%). A comparison of the performance of the hybrid-passive treatment systems indicated different extents of heterotrophic nitrification; the peat and wood shaving filter removed 49% of the ammonia and nitrified 29%, while the constructed wetland removed 99% of the ammonia and nitrified 90%. Hybrid-passive landfill leachate treatment was determined to be feasible in cold climates.
authors: Department of Civil Engineering, Queen's University, Kingston ON, Canada K7L 3N6.
authors: Sean
authors: S
authors: Speer
authors: Pascale
authors: P
authors: Champagne
authors: Bruce
authors: B
authors: Anderson
mesh_terms: D000042:Absorption; D002980:Climate; D003080:Cold Temperature; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D007287:Inorganic Chemicals / Q000302:isolation & purification*; D010865:Pilot Projects; D012037:Refuse Disposal / Q000295:instrumentation*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*; D014934:Wood / Q000737:chemistry*
chemical_list: D007287:Inorganic Chemicals; D014874:Water Pollutants, Chemical