Izvorni znanstveni članak
https://doi.org/10.15255/KUI.2022.034
Nitrogen Removal with Aerobic Granules – Effect of Dissolved Oxygen and Carbon/Nitrogen Ratio
Mirjana Galant
; Usluga odvodnja d. o. o., Šime Kurelića 22, 52 000 Pazin, Hrvatska
Dijana Grgas
orcid.org/0000-0003-0687-6524
; Sveučilište u Zagrebu, Prehrambeno-biotehnološki fakultet, Pierottijeva ulica 6, 10 000 Zagreb
Tea Štefanac
; Sveučilište u Zagrebu, Prehrambeno-biotehnološki fakultet, Pierottijeva ulica 6, 10 000 Zagreb
Mirna Habuda-Stanić
orcid.org/0000-0002-0089-9488
; Sveučilište J.J. Strossmayera u Osijeku, Prehrambeno-tehnološki fakultet Osijek, F. Kuhača 18, 31 000 Osijek
Tibela Landeka Dragičević
; Sveučilište u Zagrebu, Prehrambeno-biotehnološki fakultet, Pierottijeva ulica 6, 10 000 Zagreb
Sažetak
Nitrogen removal efficiency related to the dissolved oxygen (DO) concentration (DO 1–7 mg l–1), carbon/nitrogen ratio (COD/N 1–14), and the effect of airflow (0.4–2.9 l min–1) related to the granule size were investigated. The average chemical oxygen demand (COD) removal of ≥ 90 % was achieved at COD/N ≥ 11, but the satisfactory N values in effluent for discharge into the surface waters were almost achieved at COD/N 14. DO of 2 mg l–1 is recommended for efficient removal of N and COD with mature granules. The size (diameter) of the granules decreases with increased airflow.
Ključne riječi
aerobic granules; COD removal; N removal; sodium acetate; synthetic wastewater
Hrčak ID:
291056
URI
Datum izdavanja:
11.1.2023.
Posjeta: 357 *