In this work, a fuzzy-logic controller for minimization of the nitrous oxide emission from wastewater treatment plants is developed and tested in a simulation environment. The controller is designed in order to maintain a balance between production and consumption of nitrite by AOB and NOB microorganisms respectively. Thus, accumulation of nitrite is prevented and AOB denitrification, the main N 2 O producer, is drastically slowed down. The controller is designed to adjust the oxygen supply according to a measured parameter which typically indicates the ratio of the activity of NOB over AOB. The controller is tested on a benchmark simulation model describing the production of N 2 O during both AOB denitrification and HB denitrification. Comparisons between simulation results of open-loop and closed-loop have revealed the potential of the controller to significantly reduce the amount of N 2 O emitted (approximately 35%). On the other side, this reduction of N 2 O was accompanied by an increase in the aeration costs. Moreover, a plant performance evaluation under dynamic disturbances shows that the effluent quality is compromised due to higher requirements of organic carbon by denitrifying heterotrophs. The controller can therefore be considered effective for the reduction of N 2 O production by AOB but would need to be coupled with a secondary control strategy ensuring a complete oxidation of the nitrogen oxides by heterotrophs to have a good effluent quality.


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    Titel :

    Control of wastewater N 2 O emissions by balancing the microbial communities using a fuzzy-logic approach


    Beteiligte:
    Boiocchi, Riccardo (Autor:in) / Gernaey, Krist (Autor:in) / Sin, Gürkan (Autor:in)

    Erscheinungsdatum :

    2016-01-01


    Anmerkungen:

    Boiocchi , R , Gernaey , K & Sin , G 2016 , Control of wastewater N 2 O emissions by balancing the microbial communities using a fuzzy-logic approach . in IFAC-PapersOnLine . vol. 49 , Elsevier , IFAC Proceedings Volumes (IFAC-PapersOnline) , pp. 1157-1162 , 11th IFAC Symposium on Dynamics and Control of Process Systems Including Biosystems DYCOPS-CAB 2016 , Trondheim , Norway , 06/06/2016 . https://doi.org/10.1016/j.ifacol.2016.07.359



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629



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