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

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• 作者：Mari K.H. Winkler^a ; ¹ ; Jingjing Yang^b ; ¹ ; Robbert Kleerebezem^a ; Elzbieta Plaza^b ; Jozef Trela^b ; Bengt Hultman^b ; Mark C.M. van Loosdrecht^a ; ^{M.C.M.vanLoosdrecht@tudelft.nl}
• 关键词：Anammox bacteria ; Ammonium oxidizing bacteria ; Acetate ; Nitrate ; Heterotrophic bacteria
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：June, 2012
• 卷：114
• 期：Complete
• 页码：217-223
• 文件大小：408 K

摘要

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 鈥?em>Brocadia fulgida鈥?with a minor fraction of Candidatus 鈥?em>Anammoxoglobus propionicus鈥? both known to be capable of oxidizing VFAs.