Nitrate reduction by organotrophic Anammox bacteria in a nitritation/anammox granular sludge and a moving bed biofilm reactor
2012 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 114, 217-223 p.Article in journal (Refereed) Published
The effects of volatile fatty acids (VFAs) on nitrogen removal and microbial community structure in nitritation/anammox process were compared within a granular sludge reactor and a moving bed biofilm reactor. Nitrate productions in both systems were lower by 40-68% in comparison with expected nitrate production. Expected sludge production on VFAs was estimated to be 67-77% higher if heterotrophs were the main acetate degraders suggesting that Anammox bacteria used its organotrophic capability and successfully competed with general heterotrophs for organic carbon, which led to a reduced sludge production. FISH measurements showed a population consisting of mainly Anammox and AOB in both reactors and oxygen uptake rate (OUR) tests also confirmed that flocculent biomass consisted of a minor proportion of heterotrophs with a large proportion of AOBs. The dominant Anammox bacterium was Candidatus " Brocadia fulgida" with a minor fraction of Candidatus " Anammoxoglobus propionicus" both known to be capable of oxidizing VFAs.
Place, publisher, year, edition, pages
2012. Vol. 114, 217-223 p.
Acetate, Ammonium oxidizing bacteria, Anammox bacteria, Heterotrophic bacteria, Nitrate
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-96188DOI: 10.1016/j.biortech.2012.03.070ISI: 000305035900029ScopusID: 2-s2.0-84860462647OAI: oai:DiVA.org:kth-96188DiVA: diva2:529872
QC 201205312012-05-312012-05-312012-07-30Bibliographically approved