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URN: urn:nbn:de:swb:90-235937

Nitrification in Fixed Bed Reactors Treating Saline Wastewater


Two fixed bed reactors for nitrification with either polyethylene/clay sinter lamellas (FBR A) or porous ceramic rings (FBR B) were continously run for treating synthetic saline wastewater. Seawater from Hafen Büsum was used as an inoculums. The performance of the system was evaluated under different operating conditions.
A better overall nitrification without nitrite accumulation was observed in FBR B during continuous incubation. However, in term of ammonia (AOR) and nitrite oxidation rates (NOR) that were determined in batch incubations, FBR A revealed a higher AOR and NOR of 6 and 7 mg N L-1 h-1, compared to the AOR and NOR of 5 and 5.9 mg N L-1 h-1 in FBR B, respectively.
For studies of the effect of fluctuating salinity on the nitrification, polyethylene/clay sinter lamellas or porous ceramic rings from FBR A and B, respectively, were used as a source of immobilized nitrifiers. Salt concentrations were decreased from 3.5% to 0.03% via 2, 1 and 0.5% and increased from 3.5% to 5, 7 and 9%.
A similar result for AOR and NOR during batch incubation was obtained for both substrata in FBR A and FBR B. The salinity changes infl ... mehr

Zugehörige Institution(en) am KIT Institut für Ingenieurbiologie und Biotechnologie des Abwassers (IBA)
Publikationstyp Hochschulschrift
Jahr 2011
Sprache Englisch
Identifikator KITopen-ID: 1000023593
Verlag Karlsruhe
Abschlussart Dissertation
Fakultät Fakultät für Bauingenieur-, Geo- und Umweltwissenschaften (BGU)
Institut Institut für Ingenieurbiologie und Biotechnologie des Abwassers (IBA)
Prüfungsdaten 06.05.2011
Referent/Betreuer Prof. J. Winter
Schlagworte Halophilic nitrification, Saline wastewater, Fixed bed-reactors, Free ammonia und Free nitrous acid
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