PROIMI   05436
PLANTA PILOTO DE PROCESOS INDUSTRIALES MICROBIOLOGICOS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Decolourization of sugar cane refinery wastewater by yeast strains Trichosporon akiyoshidainum HP 2023 and Trichosporon porosum MM 4029
Autor/es:
MARTORELL, MARIA M.; FIGUEROA, LUCIA I. C.; PAJOT, HIPOLITO F.; COCA SANZ, MÓNICA; GONZÁLEZ BENITO, GERARDO; GARCÍA GONZÁLES, MARÍA TERESA
Lugar:
Madison, Wisconsin
Reunión:
Congreso; 13th International Congress on Yeasts. ICY-2012; 2012
Institución organizadora:
ICY, International Commission on yeasts
Resumen:
  Throughout the sugar production process, dark brown pigmented components, caramel, melanoidins and alkaline degradation products, are produced by undesired reactions. In this work, yeasts Trichosporon akiyoshidainum HP 2023 and Trichosporon porosum MM 4029, previously described for dye removal, were evaluated for sugar cane refinery wastewater decolourization. In normal decolourization media (NDM) containing different dilutions of refinery wastewater (RW) and retained refinery wastewater (RRW), the maximum decrease in the absorbance spectrum was obtained in RRW dilution 1:20, selected for further assays. High salinity and initial pH value (due to the nature of the RW) might be the main reason for the growth inhibition and therefore lack of diminution in the absorbance spectrum in RW. Decolourization kinetics showed no differences in biomass production, pH reduction, and UFC when compared with control cultures without RRW. Color removal measured by the decrease in absorbance at 475 nm was 60 % for T. akiyoshidainum HP 2023 and 45 % for T. porosum MM 4029 at 48h, and remained constant up to the end of the incubation time (144h). Pre-incubation of the inocula with RRW proved no increment in the decolourization yield. These results make the treatment of this wastewater with T. akiyoshidainum HP 2023 a potential solution for the environmental problem caused by sugar industries.