Nitrate reduction by organotrophic Anammox bacteria in a nitritation/anammox granular sludge and a moving bed biofilm reactor

作者：Winkler Mari K H; Yang Jingjing; Kleerebezem Robbert; Plaza Elzbieta; Trela Jozef; Hultman Bengt; van Loosdrecht Mark C M^*

来源：Bioresource Technology, 2012, 114: 217-223.

DOI：10.1016/j.biortech.2012.03.070

• Anammox bacteria
• Ammonium oxidizing bacteria
• Acetate
• Nitrate
• Heterotrophic bacteria

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 %26quot;Brocadia fulgida%26quot; with a minor fraction of Candidatus %26quot;Anammoxoglobus propionicus%26quot;, both known to be capable of oxidizing VFAs.

• 出版日期2012-6