Record nummer 2105398
Titel artikel Identifying N2O formation and emissions from a full-scale partial nitritation reactor
Auteur(s) Mampaey, K.E. ; Kreuk, M.K. de ; Dongen, U.G.J.M. van ; Loosdrecht, M.C.M. van ; Volcke, E.I.P.
Tijdschrifttitel Water research : the journal of the International Association on Water Quality
Deel(Jaar)Nummer 88(2016)January
Paginering 575 - 585
Online full text
Trefwoorden (cab) broeikasgassen / monitoring / distikstofmonoxide / afvalwater / chemie
Rubrieken Chemie (algemeen) / Afvalwaterbehandeling
Publicatie type Artikel
Taal Engels
Toelichting (Engels) In this study, N2O formation and emissions from a full-scale partial nitritation (SHARON) reactor were identified through a three-weeks monitoring campaign during which the off-gas was analysed for N2O, O2, CO2 and NO. The overall N2O emission was 3.7% of the incoming ammonium load. By fitting the N2O emission to a theoretical gas stripping profile, the N2O emissions could be assigned to aerobically formed N2O and N2O formed under anoxic conditions. This was further substantiated by liquid N2O measurements. Under standard operation, 70% of the N2O emission was attributed to anoxic N2O formation. Dedicated experiments revealed that low dissolved oxygen concentrations (<1.0 g O2·m−3) and longer anoxic periods resulted in an increased N2O emission. Minimising or avoiding anoxic conditions has the highest effect in lowering the N2O emissions. As an additional result, the use of the off-gas N2O concentration measurements to monitor the gas–liquid mass transfer rate coefficient (kLa) during dynamic reactor operation was demonstrated.
Betrokken instanties Waterschap Hollandse Delta
Technische Universiteit Delft
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