Cristin-resultat-ID: 1805787
Sist endret: 15. september 2020, 12:13
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig artikkel
2020

Biofilms remember: Osmotic stress priming as a microbial management strategy for improving salinity acclimation in nitrifying biofilms

Bidragsytere:
  • Sharada Navada
  • Olav Vadstein
  • Frederic Gaumet
  • Ann-Kristin Tveten
  • Claudia Spanu
  • Øyvind Mikkelsen
  • mfl.

Tidsskrift

Water Research
ISSN 0043-1354
e-ISSN 1879-2448
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Publisert online: 2020
Trykket: 2020
Volum: 176
Sider: 1 - 9
Artikkelnummer: 115732
Open Access

Importkilder

Scopus-ID: 2-s2.0-85082874397

Beskrivelse Beskrivelse

Tittel

Biofilms remember: Osmotic stress priming as a microbial management strategy for improving salinity acclimation in nitrifying biofilms

Sammendrag

With increasing freshwater scarcity and greater use of seawater, fluctuating salinities are becoming common in water treatment systems. This can be challenging for salinity-sensitive processes like nitrification, especially in recirculating aquaculture systems (RAS), where maintaining nitrification efficiency is crucial for fish health. This study was undertaken to determine if prior exposure to seawater (priming) could improve nitrification in moving bed biofilm reactors (MBBR) under salinity increase from freshwater to seawater. The results showed that seawater-primed freshwater MBBRs had less than 10% reduction in nitrification activity and twice the ammonia oxidation capacity of the unprimed bioreactors after seawater transfer. The primed biofilms had different microbial community composition but the same nitrifying taxa, suggesting that priming promoted physiological adaptation of the nitrifiers. Priming may also have strengthened the extrapolymeric matrix protecting the nitrifiers. In MBBRs started up in brackish water (12‰ salinity), seawater priming had no significant impact on the nitrification activity and the microbial community composition. These bioreactors were inherently robust to salinity increase, likely because they were already primed to osmotic stress by virtue of their native salinity of 12‰. The results show that osmotic stress priming is an effective strategy for improving salinity acclimation in nitrifying biofilms and can be applied to water treatment systems where salinity variations are expected.

Bidragsytere

Sharada Navada

Bidragsyterens navn vises på dette resultatet som Sharada Navada
  • Tilknyttet:
    Forfatter
    ved Institutt for kjemi ved Norges teknisk-naturvitenskapelige universitet
  • Tilknyttet:
    Forfatter
    ved Krüger Kaldnes AS

Olav Vadstein

  • Tilknyttet:
    Forfatter
    ved Institutt for bioteknologi og matvitenskap ved Norges teknisk-naturvitenskapelige universitet

Frederic Gaumet

  • Tilknyttet:
    Forfatter
    ved Krüger Kaldnes AS

Ann-Kristin Tveten

  • Tilknyttet:
    Forfatter
    ved Institutt for biologiske fag Ålesund ved Norges teknisk-naturvitenskapelige universitet

Claudia Spanu

  • Tilknyttet:
    Forfatter
    ved Università degli Studi di Cagliari
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