Data/hora: 07/06/2024 05:52:45

Provedor de dados: | 52
País: | Brazil
Título: | Population Changes of Eubacteria, Sulfate-Reducing Bacteria and Methanogenic Archaea in an Anaerobic Reactor Processing Ethanol Distillery Vinasse
Autores: | Brown,Adis Ivonne Terry; Pozzi,Eloisa; Damianovic,Marcia Helena Rissato Zamariolli; Briones,Homero Enrique Urrutia; Ortiz,Leslie Ester Abarzúa; Pires,Eduardo Cleto.
Data: | 2019-01-01
Ano: | 2019
Palavras-chave: | UASB reactor; Microbial characterization; Methanogenesis; Sulfidogenesis; DGGE; Quantitative PCR.
Resumo: | Abstract The microbiological characterization by molecular techniques (DGGE and quantitative PCR) of Archaea, Bacteria domain and sulfate-reducing bacteria (SRB) from a laboratory scale Up-flow Anaerobic Sludge Blanket (UASB) processing sugar cane vinasse was performed during the operational phase with increasing organic loads. The organic load removal efficiency was between 97% and 75% for volumetric organic loads (VOL) in the range of 0.6 to 15.4 kgCOD.m-3.d−1 and for higher VOL (until 27.0 kgCOD.m-3 .d−1) the removal efficiency decreased to 48%. Archaea represented the majority of the estimated population (107 copies of 16S RNA ribosomal gene. mL-1) followed by bacteria (106 copies of 16S RNA ribosomal gene. mL-1) and sulfate-reducing bacteria (SRB) (105 copies of dsrB gene. mL-1). There was a significant difference between the populations of Archaea and SRB with increasing VOL. DGGE profiles show differences among populations with increasing VOL, especially with respect to sulfate-reducing bacteria. The presence of SRB together with a high sulfate removal percentage (97%) of about 15 kgCOD.m-3d-1h, indicates the establishment of a sulfidogenic process.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100203
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/1678-4324-2019180268
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.62 2019
Fonte: | info:eu-repo/semantics/openAccess