Naslov
Nitrogen Removal with Aerobic Granules – Effect of Dissolved Oxygen and Carbon/Nitrogen Ratio

Autori
Galant, Mirjana ; Grgas, Dijana ; Štefanac, Tea ; Habuda-Stanić, Mirna ; Landeka Dragičević, Tibela

Izvornik
Kemija u industriji : časopis kemičara i tehnologa Hrvatske (0022-9830) 72 (2023), 1-2; 25-32

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
aerobne granule, uklanjanje organske tvari, N uklanjanje, natrijev acetat, sintetska otpadna voda
(Aerobic granules, COD removal, N removal, Sodium acetate, Synthetic wastewater)

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.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija

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