Evaluation of microorganisms with sulfidogenic metabolic potential under anaerobic conditions
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Data
2012-10-01
Autores
Sakamoto, Isabel Kimiko
Maintinguer, Sandra Imaculada [UNESP]
Hirasawa, Julia Sumiko
Adorno, Maria Angela Tallarico
Varesche, Maria Bernadete Amâncio
Título da Revista
ISSN da Revista
Título de Volume
Editor
Instituto de Tecnologia do Paraná - Tecpar
Resumo
The aim of this work was to identify groups of microorganisms that are capable of degrading organic matter utilizing sulfate as an electron acceptor. The assay applied for this purpose consisted of running batch reactors and monitoring lactate consumption, sulfate reduction and sulfide production. A portion of the lactate added to the batch reactors was consumed, and the remainder was converted into acetic, propionic and butyric acid after 111 hours of operation These results indicate the presence of sulfate-reducing bacteria (SRB) catalyzing both complete and incomplete oxidation of organic substrates. The sulfate removal efficiency was 49.5% after 1335 hours of operation under an initial sulfate concentration of 1123 mg/L. The SRB concentrations determined by the most probable number (MPN) method were 9.0x10(7) cells/mL at the beginning of the assay and 8.0x10(5) cells/mL after 738 hours of operation.
Descrição
Palavras-chave
sulfate-reducing bacteria, lactate, Most Probable Number, organic acids
Como citar
Brazilian Archives of Biology and Technology. Instituto de Tecnologia do Paraná - Tecpar, v. 55, n. 5, p. 779-784, 2012.