Paper mill effluent decolorization by fifty Streptomyces strains.
Autores
Hernández Cutuli, Manuel Pascual; Rodríguez Bullido, Juana; Soliveri de Carranza, Juan; Copa Patiño, José Luis; Pérez Leblic, María Isabel; [et al.]Fecha de publicación
1994Cita bibliográfica
Applied and Environmental Microbiology, 1994, v. 60, n. 11, p. 3909-3913
Palabras clave
article
bacterial growth
coloreffluent toxicity
fractionation
paper industry
ph measurement
reaction analysis
strain difference
streptomycesthin layer chromatography
Tipo de documento
info:eu-repo/semantics/article
Versión
info:eu-repo/semantics/publishedVersion
Derechos
Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
© 1994 American Society for Microbiology
Derechos de acceso
info:eu-repo/semantics/openAccess
Resumen
Fifty actinomycete strains isolated from lignocellulosic substrates were examined for the ability to remove the color from a paper mill effluent obtained after semichemical alkaline pulping of wheat straw. Streptomyces sp. strains UAH 15, UAH 23, UAH 30, and UAH 51 were selected for their ability to decolorize the effluent in a liquid medium containing 1% (wt/vol) glycerol, 0.2% (wt/vol) ammonium sulfate, and 80% (vol/vol) effluent. The highest levels of decolorization achieved after the strains grew were 60 to 65%. Strains UAH 30 and UAH 51 were selected for further study because of their different patterns of effluent decolorization during growth. Fractionation of the decolorized effluent by gel permeation chromatography demonstrated that there were reductions in the levels of absorbance of the high- and medium- molecular-weight compounds. These fractions were mainly responsible for the color of the effluent, while the last fractions, the low-molecular-weight compounds, could have been responsible for the residual color of the decolorized effluent. Thin-layer chromatography revealed significant differences among the patterns of bands corresponding to the acidified supernatants obtained after precipitation of alkali-lignin from the effluent samples decolorized by different Streptomyces strains.
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