title: Enhancing struvite precipitation potential for ammonia nitrogen removal in municipal landfill leachate.
abstract: This study was conducted to improve struvite precipitation for NH4-N removal purpose in landfill leachate. For this purpose, we evaluated the effect of the feeding sequence of precipitating reagents (magnesium, orthophosphate, and buffering reagent) on NH4-N removal by forming struvite deposits. Struvite precipitation effectively proceeded by an addition of excess magnesium and phosphate sources followed by an addition of the buffering reagent, in which condition the local formation of inappropriate deposits or the contamination of the desired struvite was minimized. We also tested the effect of struvite addition as the seeding materials on NH4-N removal. Seed addition would increase the potential for the struvite crystal growth, which enhanced NH4-N removal performance in landfill leachate treatment.
authors.affiliation: Department of Environmental Engineering, Chungbuk National University, South Korea.
authors.forename: Daekeun
authors.initials: D
authors.lastname: Kim
authors.forename: Hong-Duck
authors.initials: HD
authors.lastname: Ryu
authors.forename: Man-Soo
authors.initials: MS
authors.lastname: Kim
authors.forename: Jinhyeong
authors.initials: J
authors.lastname: Kim
authors.forename: Sang-Ill
authors.initials: SI
authors.lastname: Lee
mesh_terms: D000641:Ammonia / Q000737:chemistry*; D011232:Chemical Precipitation; D015636:Magnesium Chloride / Q000737:chemistry; D017616:Magnesium Compounds / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry*; D017680:Potassium Compounds / Q000737:chemistry; D012037:Refuse Disposal; D000069877:Struvite; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D017616:Magnesium Compounds; D010710:Phosphates; D017680:Potassium Compounds; D014874:Water Pollutants, Chemical; D015636:Magnesium Chloride; D000641:Ammonia; D000069877:Struvite; C013216:potassium phosphate; D009584:Nitrogen