title: Autotrophic nitrogen removal by a two-step SBR process applied to mixed agro-digestate.
abstract: The aim of this research was to evaluate the applicability of partial-nitritation/anammox processes for biological N removal from a centrifuge supernatant coming from a full scale anaerobic digester fed on a mixture of piggery manure, poultry manure, and agro-wastes. Stable partial nitritation was achieved at pilot-scale (650L SBR), obtaining a suitable influent for the anammox lab-scale SBR reactor (3L). The anammox lab scale reactor was fed with increasing fractions of the partial nitritation effluent, blended with synthetic wastewater. In the last 100days no dilution was used. The nitrogen loading rate applied to the anammox reactor was 0.5-0.6gNL(-)(1)d(-)(1) and the average nitrogen removal was 91±10%. During the first days of operation with undiluted supernatant, the maximum anammox activity in the SBR decreased, but recovered afterwards, suggesting the ability of the anammox biomass to acclimate to the wastewater. N2O emissions in both reactors were also measured.
authors.affiliation: Politecnico di Milano, Department of Civil and Environmental Engineering - DICA, Environmental Section, Piazza L. da Vinci 32, 20133 Milano, Italy. Electronic address: davide.scaglione@polimi.it.
authors.forename: D
authors.initials: D
authors.lastname: Scaglione
authors.affiliation: Politecnico di Milano, Department of Civil and Environmental Engineering - DICA, Environmental Section, Piazza L. da Vinci 32, 20133 Milano, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Ficara
authors.affiliation: Politecnico di Milano, Department of Civil and Environmental Engineering - DICA, Environmental Section, Piazza L. da Vinci 32, 20133 Milano, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Corbellini
authors.affiliation: Politecnico di Milano, Department of Civil and Environmental Engineering - DICA, Environmental Section, Piazza L. da Vinci 32, 20133 Milano, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Tornotti
authors.affiliation: Politecnico di Milano, Department of Civil and Environmental Engineering - DICA, Environmental Section, Piazza L. da Vinci 32, 20133 Milano, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Teli
authors.affiliation: Politecnico di Milano, Department of Civil and Environmental Engineering - DICA, Environmental Section, Piazza L. da Vinci 32, 20133 Milano, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Canziani
authors.affiliation: Politecnico di Milano, Department of Civil and Environmental Engineering - DICA, Environmental Section, Piazza L. da Vinci 32, 20133 Milano, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Malpei
mesh_terms: D064751:Ammonium Compounds / Q000378:metabolism; D000818:Animals; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D008372:Manure / Q000032:analysis*; D013058:Mass Spectrometry; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism*; D010084:Oxidation-Reduction; D010316:Particle Size; D011200:Poultry; D013552:Swine; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*
chemical_list: D064751:Ammonium Compounds; D008372:Manure; D009584:Nitrogen
keywords: Anammox; Animal wastes; Autotrophic nitrogen removal; Nitrous oxide emissions; Partial nitritation