Aeration control in a full-scale activated sludge wastewater treatment plant: impact on performances, energy consumption and N2O emission

A. Filali (1) , Y. Fayolle (1) , P. Peu (2) , L. Philippe (3) , F. Nauleau (3) , Sylvie Gillot (1)

1 UR HBAN - Hydrosystèmes et Bioprocédés
2 UR GERE - Gestion environnementale et traitement biologique des déchets
3 Recherche et Développement

This work investigated the impact of aeration control strategy on energy consumption and nitrous oxide (N2O) emission in a full-scale wastewater treatment plant. Two identical activated sludge processes treating the same effluent but operated with different aeration control strategies were compared. Aeration tank 1 was operated with a new control strategy favouring the simultaneous nitrification denitrification (SND) whereas aeration tank 2 was operated with a conventional control strategy with distinct nitrification and denitrification phases. Results indicated that whereas the N2O emission factor was comparable in both systems (in the order of magnitude of 0.004% of the influent TKN load), N2O emission pattern was dependent on the adopted aeration control strategy. It has been observed that high aeration

Mots clés: AERATION; PROTOXYDE D'AZOTE; BOUES ACTIVEES; CONSOMMATION D'ENERGIE; EPURATION; EAU USEE; TRAITEMENT DE L'EAU RESIDUAIRE; STATION D'EPURATION; STATION DE BOUES ACTIVEES; AERATION CONTROL STRATEGY; NITROUS OXIDE EMISSION; ACTIVATED SLUDGE

Domaines: Sciences de l'environnement

A. Filali, Y. Fayolle, P. Peu, L. Philippe, F. Nauleau, et al.. Aeration control in a full-scale activated sludge wastewater treatment plant: impact on performances, energy consumption and N2O emission. 11ème Conférence IWA sur l'instrumentation, le contrôle et l'automatisation. ICA2013, Sep 2013, Narbonne, France. 4 p. ⟨hal-00941253⟩