title: Removal of ammonia by immobilized Nitrosomonas europaea in a biotrickling filter packed with polyurethane foam.
abstract: A biotrickling filter with Nitrosomonas europaea immobilized on polyurethane foam is proposed for treating ammonia contaminated air. The effect of the surface velocity of the recirculation medium, nitrite concentration, pH, empty bed residence time (EBRT) and ammonia inlet load on the NH(3) removal process was investigated. The total amount of biomass immobilized on the carrier was 3.29+/-0.52 x 10(10) cells g(-1) dry carrier. The maximum elimination capacity of the biotrickling filter was 270 g Nm(-3)h(-1) at pH 7.5, an EBRT of 11s, and nitrite concentrations below 100mM. These results show that system studied can be considered as a viable alternative for the treatment of gaseous emissions containing high concentrations of ammonia.
authors.affiliation: Department of Chemical Engineering, Faculty of Sciences, University of Cádiz, Cádiz, Spain. martin.ramirez@uca.es
authors.forename: Martín
authors.initials: M
authors.lastname: Ramírez
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Gómez
authors.forename: Germán
authors.initials: G
authors.lastname: Aroca
authors.forename: Domingo
authors.initials: D
authors.lastname: Cantero
mesh_terms: D000397:Air Pollution / Q000517:prevention & control*; D000641:Ammonia / Q000378:metabolism*; D001673:Biodegradation, Environmental; D018533:Biomass; D005374:Filtration / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D009573:Nitrites / Q000737:chemistry; D043370:Nitrosomonas europaea / Q000254:growth & development / Q000378:metabolism*; D011140:Polyurethanes
chemical_list: D009573:Nitrites; D011140:Polyurethanes; D000641:Ammonia; C028279:polyurethane foam