title: Effect of organic and metal ion concentration on the simultaneous biological removal of NH4+ and NO3- under anaerobic condition.
abstract: A bacterial strain of Pseudomonas aeruginosa AE-1-3, isolated from soil was used to remove NH4+ and NO3- simultaneously in an anaerobic environment containing 0.1% NH4NO3 and 3% glucose in the medium. After preliminary screening, eight isolates were obtained, which were evaluated for their potential to decompose NH4+ and NO3-. Each experimental investigation was carried out for 15 days under controlled laboratory conditions by varying the concentrations of glucose (0-3%). The bacterial strain, AE-1-3 showed 100% removal of both NH4+ and NO3-. The effect of metal ions in combinations of Cu2+, Zn2+, Sn2+ were also studied to ascertain the performance. The results revealed that NO3- could be removed completely in 9 days at 3 microM concentrations of the three metal ions, while 33% of NH4+ remained in 0.1% NH4NO3 medium with 0.5% glucose in the absence of these three ions.
authors.affiliation: Department of Civil and Environmental Engineering, University of Ulsan, Ulsan 680-749, South Korea.
authors.forename: Young-Ju
authors.initials: YJ
authors.lastname: Kim
authors.forename: Eldon R
authors.initials: ER
authors.lastname: Rene
authors.forename: Hung Suck
authors.initials: HS
authors.lastname: Park
mesh_terms: D000693:Anaerobiosis; D005947:Glucose / Q000737:chemistry; D007477:Ions; D008670:Metals / Q000737:chemistry*; D009573:Nitrites / Q000302:isolation & purification*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*
chemical_list: D007477:Ions; D008670:Metals; D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D005947:Glucose