title: Inhibition on anammox bacteria upon exposure to digestates from biogas plants treating the organic fraction of municipal solid waste and the role of conductivity.
abstract: The aim of this research was to evaluate the applicability of the anammox process for removing nitrogen from the supernatant originating from the anaerobic digestion of the organic fraction of municipal solid waste (OFMSW). The short term inhibitory potential of this concentrated wastewater was evaluated by means of batch tests in terms of maximum specific anammox activity reduction. A total of 20 real wastewater samples were tested originating from 4 different full scale anaerobic digestion plants treating OFMSW. Activity reduction between 73% and 89% was observed in the presence of undiluted real wastewaters. The specific activity remained stable for 6-7days after the initial reduction, thus suggesting its treatability even without dilution. The inhibitory effect of both the real and synthetic saline media tested could be modelled as a function of conductivity. IC50 of 6.1mS/cm was obtained for exposure to the tested liquid fraction of biowaste digestate.
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: T
authors.initials: T
authors.lastname: Lotti
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: F
authors.initials: F
authors.lastname: Malpei
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D061249:Batch Cell Culture Techniques; D056804:Biofuels; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D020128:Inhibitory Concentration 50; D012037:Refuse Disposal / Q000379:methods*; D062611:Solid Waste; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000382:microbiology
chemical_list: D056804:Biofuels; D062611:Solid Waste; D062065:Wastewater
keywords: Anammox; Conductivity; Digestate; Inhibition; Organic wastes; Salinity