Journal
BIORESOURCE TECHNOLOGY
Volume 166, Issue -, Pages 103-111Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.05.043
Keywords
Anaerobic ammonium oxidation (anammox); Microbial community structure; Phenol; Sequencing batch reactor; Pyrosequencing
Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico do Brasil (CNPq)
- Fundacao de Amparo a Pesquisa de Minas Gerais (FAPEMIG)
- Coordenacao de Aperfeicoamento de Pessoal de nivel Superior (CAPES)
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The effects of phenol on the nitrogen removal performance of a sequencing batch reactor (SBR) with anammox activity and on the microbial community within the reactor were evaluated. A phenol concentration of 300 mg L (1) reduced the ammonium-nitrogen removal efficiency of the SBR from 96.5% to 47%. The addition of phenol changed the microbial community structure and composition considerably, as shown by denaturing gradient gel electrophoresis and 454 pyrosequencing of 16S rRNA genes. Some phyla, such as Proteobacteria, Verrucomicrobia, and Firmicutes, increased in abundance, whereas others, such as Acidobacteria, Chloroflexi, Planctomycetes, GN04, WS3, and NKB19, decreased. The diversity of the anammox bacteria was also affected by phenol: sequences related to Candidatus Brocadia fulgida were no longer detected, whereas sequences related to Ca. Brocadia sp. 40 and Ca. Jettenia asiatica persisted. These results indicate that phenol adversely affects anammox metabolism and changes the bacterial community within the anammox reactor. (C) 2014 Elsevier Ltd. All rights reserved.
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