title: Long-term operation of a partial nitritation pilot plant treating leachate with extremely high ammonium concentration prior to an anammox process.
abstract: The goal of this work was to demonstrate the feasibility of treating leachate with high ammonium concentrations using the SBR technology, as a preparative step for the treatment in an anammox reactor. The cycle was based on a step-feed strategy, alternating anoxic and aerobic conditions. Results of the study verified the viability of this process, treating an influent with concentration up to 5000 mg N-NH(4)(+) L(-1). An effluent with about 1500-2000 mg N-NH(4)(+) L(-1) and 2000-3000 mg N-NO(2)(-) L(-1) was achieved, presenting a nitrite to ammonium molar ratio close to the 1.32 required by the anammox. Furthermore, taking advantage of the biodegradable organic matter, the operational strategy allowed denitrifying about 200 mg N-NO(2)(-) L(-1). The extreme operational conditions during the long-term resulted on the selection of a sole AOB phylotype, identified by molecular techniques as Nitrosomonas sp. IWT514.
authors: Laboratory of Chemical and Environmental Engineering (LEQUIA), Institute of the Environment, University of Girona, Campus Montilivi s/n, Facultat de Ciències, E-17071 Girona, Catalonia, Spain. ramon@lequia.udg.cat
authors: Ramon
authors: R
authors: Ganigué
authors: Jordi
authors: J
authors: Gabarró
authors: Alexandre
authors: A
authors: Sànchez-Melsió
authors: Maël
authors: M
authors: Ruscalleda
authors: Helio
authors: H
authors: López
authors: Xavier
authors: X
authors: Vila
authors: Jesús
authors: J
authors: Colprim
authors: M Dolors
authors: MD
authors: Balaguer
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002947:Cities; D006863:Hydrogen-Ion Concentration; D008829:Microbiology; D008956:Models, Chemical; D009573:Nitrites / Q000737:chemistry; D009606:Nitrosomonas / Q000378:metabolism; D010865:Pilot Projects; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical; D018508:Water Purification / Q000379:methods
chemical_list: D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical