title: Study on the effect of landfill leachate on nutrient removal from municipal wastewater.
abstract: In this study, landfill leachate with and without pre-treatment was co-treated with municipal wastewater at different mixing ratios. The leachate pre-treatment was achieved by air stripping to removal ammonia. The objective of this study was to investigate the effect of landfill leachate on nutrient removal of the wastewater treatment process. It was demonstrated that when landfill leachate was co-treated with municipal wastewater, the high ammonia concentration in the leachate did not have a negative impact on the nitrification. The system was able to adapt to the environment and was able to improve nitrification capacity. The readily biodegradable portion of chemical oxygen demand (COD) in the leachate was utilized by the system to improve phosphorus and nitrate removal. However, this portion was small and majority of the COD ended up in the effluent thereby decreased the quality of the effluent. The study showed that the 2.5% mixing ratio of leachate with wastewater improved the overall biological nutrient removal process of the system without compromising the COD removal efficiency.
authors.affiliation: Department of Civil Engineering, University of Manitoba, Winnipeg R3T5V6, Manitoba, Canada. Electronic address: qiuyan.yuan@umanitoba.ca.
authors.forename: Qiuyan
authors.initials: Q
authors.lastname: Yuan
authors.affiliation: Department of Civil Engineering, University of Manitoba, Winnipeg R3T5V6, Manitoba, Canada.
authors.forename: Huijun
authors.initials: H
authors.lastname: Jia
authors.affiliation: Department of Civil Engineering, University of Manitoba, Winnipeg R3T5V6, Manitoba, Canada.
authors.forename: Mario
authors.initials: M
authors.lastname: Poveda
mesh_terms: D000641:Ammonia / Q000032:analysis; D057919:Biological Oxygen Demand Analysis; D009584:Nitrogen / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis*; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000641:Ammonia; D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Air stripping; Biological nutrient removal; Leachate pre-treatment; Mixing ratio; Nitrification; Phosphorus removal