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Achieving Efficient and Stable Deammonification at Low Temperatures—Experimental and Modeling Studies

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The short-term effects of temperature on deammonification sludge were evaluated in a laboratory-scale sequencing batch reactor (SBR). Mathematical modeling was used for further evaluations of different intermittent aeration strategies for achieving high and stable deammonification performance at decreasing temperatures. As for the biomass cultivated at high temperatures (e.g., 30 C), a higher temperature dependency (the adjusted Arrhenius coefficient for 11–17 C = 1.71 vs. for 17–30 C = 1.12) on the specific anammox growth rates was found at lower temperatures (11–17 C) in comparison with higher temperatures (17–30 C). Further evaluations of recovering the nitrogen removal efficiency at decreasing temperatures with the mathematical model by modifying the intermittent aeration strategies (aeration frequency (F) and the ratio (R) between non-aerated (non-aer) phase and aerated (aer) phase durations) indicated that intermittent aeration with a prolonged non-aerated phase (e.g., R 4 regardless of F value) would help to maintain high and stable deammonification performance (~80%) at decreasing temperatures (14–22 C). Extending the non-aerated phases (increasing R) and reducing the frequency (F) of off/on phase changes have a positive effect on increasing energy savings, leading to increasing interest in this method.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
ENERGIES nr 14,
ISSN: 1996-1073
Język:
angielski
Rok wydania:
2021
Opis bibliograficzny:
Al-Hazmi H., Lu X., Grubba D., Majtacz J., Kowal P., Mąkinia J.: Achieving Efficient and Stable Deammonification at Low Temperatures—Experimental and Modeling Studies// ENERGIES -Vol. 14,iss. 13 (2021), s.3961-
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.3390/en14133961
Weryfikacja:
Politechnika Gdańska

wyświetlono 165 razy

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