Model-based evaluation of simultaneous nitrification and denitrification in aerobic granular sludge systems

Güçlü Insel, Gulsum Yilmaz*, Ferenc Hazi, Nazik Artan

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1 Atıf (Scopus)

Özet

A lab-scale granular sludge sequencing batch reactor (G-SBR) system was operated using synthetic wastewater. The total nitrogen removal efficiency of 85% was obtained together with the achievement of complete total phosphorus removal with average granule diameter of 400 µm. Dual-step nitrification and denitrification model with fixed biofilm thickness was used for performance analysis. The denitrification mode only contributed to TN removal with 25% which can be calculated with process stoichiometry. The remaining nitrogen removal could be explained by simulating simultaneous nitrification and denitrification which was responsible for 75% denitrification during aerobic period. In addition, low NO3 concentration at the beginning of the fill period provided advantage for securing a prolonged anaerobic period for enhanced biological phosphorus removal (EBPR). The model parameters of boundary layer thickness (z BL = 50 µm) and half-saturation of O2 for nitrite-oxidizing bacteria (K O2,NOB = 0.5 gO2/m3) were tuned to fit NO2 and NO3 profiles in SBR cycle. Graphical Abstract: [Figure not available: see fulltext.].

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)124780-124789
Sayfa sayısı10
DergiEnvironmental Science and Pollution Research
Hacim30
Basın numarası60
DOI'lar
Yayın durumuYayınlandı - Ara 2023

Bibliyografik not

Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Finansman

This work was funded by The Scientific and Technological Research Council of Turkey, TUBITAK (Project No: 107Y137), and the Research Foundation of Istanbul University (Project No: 613/15122006).

FinansörlerFinansör numarası
Istanbul Üniversitesi613/15122006
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu107Y137

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