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  • Title: Adaptation of a freshwater anammox population to high salinity wastewater.
    Author: Kartal B, Koleva M, Arsov R, van der Star W, Jetten MS, Strous M.
    Journal: J Biotechnol; 2006 Dec 01; 126(4):546-53. PubMed ID: 16806555.
    Abstract:
    For the successful application of anaerobic ammonium oxidation (anammox) in wastewater practice it is important to know how to seed new anammox reactors with biomass from existing reactors. In this study, a new high salinity anammox reactor was inoculated with biomass from a freshwater system. The changes in activity and population shifts were monitored. It was shown that freshwater anammox bacteria could adapt to salt concentrations as high as 30 gl(-1) provided the salt concentration was gradually increased. Higher salt concentrations reversibly inhibited anammox bacteria. The nitrogen removal efficiency and maximum anammox activity of the salt adapted sludge was very similar to the reference freshwater sludge. Fluorescence in situ hybridization analysis revealed that the freshwater anammox species Candidatus "Kuenenia stuttgartiensis" was the dominant in both salt adapted sludge and freshwater sludge. These results show that gradual adaptation may be the key to successful seeding of anammox bioreactors.
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