Importance of the combined effects of dissolved oxygen and pH on optimization of nitrogen removal in anammox-enriched granular sludge - Publikacja - MOST Wiedzy

Wyszukiwarka

Importance of the combined effects of dissolved oxygen and pH on optimization of nitrogen removal in anammox-enriched granular sludge

Abstrakt

The combined effects of dissolved oxygen (DO) and pH on nitrogen removal were investigated in a laboratory-scale sequencing batch reactor (SBR) with anammox-enriched granular sludge obtained from a nitritation/anammox system. The highest specific nitrogen removal rate (SNRR) (1.1 gN gVSS−1 d−1) was observed under non-aerated conditions, resulting in the nitrogen removal efficiency of 81.6%. Although nitrogen removal was readily inhibited under aerated conditions, an increased SNRR occurred at the DO concentration of 0.5 mg O2 L−1. This is in contrast with the directional DO suppression on nitrogen removal in the anammox process, indicating that other nitrogen conversion pathways, such as nitrification and endogenous denitrification, were also active in the studied reactor. The highest SNRRs were obtained within a pH range of 6.5–8.5, characterized by low concentrations of free ammonia (FA) and free nitrous acid (FNA). Oxygen-consuming bacteria (nitrifiers) were implicitly inhibited by the low pH so that less oxygen was utilized. In tests carried out using the optimum pH physiological range (6.5–8.5) for microorganisms, an explicit DO elbow was observed when the ammonium and nitrite were almost completely removed. This finding confirms the occurrence of nitrogen removal by the oxygen-consuming bacteria in the system studied.

Cytowania

  • 3 1

    CrossRef

  • 2 9

    Web of Science

  • 4 1

    Scopus

Autorzy (9)

Cytuj jako

Pełna treść

pełna treść publikacji nie jest dostępna w portalu

Słowa kluczowe

Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
PROCESS BIOCHEMISTRY nr 51, wydanie 9, strony 1274 - 1282,
ISSN: 1359-5113
Język:
angielski
Rok wydania:
2016
Opis bibliograficzny:
Yin Z., Santos C., Vilaplana J., Sobotka D., Czerwionka K., Damianovic M., Xie L., Morales F., Mąkinia J.: Importance of the combined effects of dissolved oxygen and pH on optimization of nitrogen removal in anammox-enriched granular sludge// PROCESS BIOCHEMISTRY. -Vol. 51, iss. 9 (2016), s.1274-1282
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.procbio.2016.05.025
Weryfikacja:
Politechnika Gdańska

wyświetlono 117 razy

Publikacje, które mogą cię zainteresować

Meta Tagi