Base de dados : LILACS
Pesquisa : B03.660.125 [Categoria DeCS]
Referências encontradas : 1 [refinar]
Mostrando: 1 .. 1   no formato [Detalhado]

página 1 de 1

  1 / 1 LILACS  
             
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1047766
Autor: Franchi, Oscar; Rosenkranz, Francisca; Chamy, Rolando.
Título: Key microbial populations involved in anaerobic degradation of phenol and p-cresol using different inocula
Fonte: Electron. j. biotechnol;35:33-38, sept. 2018. graf.
Idioma: en.
Projeto: CONICYT; . FONDECYT.
Resumo: Background: Anaerobic digestion is an alternative bioprocess used to treat effluents containing toxic compounds such as phenol and p-cresol. Selection of an adequate sludge as inoculum containing an adapted microbial consortium is a relevant factor to improve the removal of these pollutants. The objective of this study is to identify the key microorganisms involved in the anaerobic digestion of phenol and p-cresol and elucidate the relevance of the bamA gene abundance (a marker gene for aromatic degraders) in the process, in order to establish new strategies for inocula selection and improve the system's performance. Results: Successive batch anaerobic digestion of phenol and p-cresol was performed using granular or suspended sludge. Granular sludge in comparison to suspended sludge showed higher degradation rates both for phenol (11.3 ± 0.7 vs 8.1 ± 1.1 mg l-1 d-1) and p-cresol (7.8 ± 0.4 vs 3.7 ± 1.0 mg l-1 d-1). After three and four re-feedings of phenol and p-cresol, respectively, the microbial structure from both sludges was clearly different from the original sludges. Anaerobic digestion of phenol and p-cresol generated an abundance increase in Syntrophorhabdus genus and bamA gene, together with hydrogenotrophic and aceticlastic archaea. Analysis of results indicates that differences in methanogenic pathways and levels of Syntrophorhabdus and bamA gene in the inocula, could be the causes of dissimilar degradation rates between each sludge. Conclusions: Syntrophorhabdus and bamA gene play relevant roles in anaerobic degradation of phenolics. Estimation of these components could serve as a fast screening tool to find the most acclimatized sludge to efficiently degrade mono-aromatic compounds.
Descritores: Bactérias/metabolismo
Digestão Anaeróbia
Fenol/metabolismo
Cresóis/metabolismo
-Fenóis/metabolismo
Esgotos
Biodegradação Ambiental
Deltaproteobacteria
Consórcios Microbianos
Reação em Cadeia da Polimerase em Tempo Real
Responsável: CL1.1 - Biblioteca Central



página 1 de 1
   


Refinar a pesquisa
  Base de dados : Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde