INVESTIGADORES
FERRO OROZCO Ana Micaela
artículos
Título:
Effects of combining biological treatment and activated carbon on hexavalent chromium reduction
Autor/es:
ANA MICAELA FERRO OROZCO; EDGARDO MARTIN CONTRERAS; NOEMI ELIZABET ZARITZKY
Revista:
BIORESOURCE TECHNOLOGY
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2011 vol. 102 p. 2495 - 2502
ISSN:
0960-8524
Resumen:
The objectives of the present work were: (a) to analyze the Cr(VI) removal by combining activated sludge (AS) with powdered activated carbon (PAC), (b) to analyze the effect of PAC and Cr(VI) on the growth kinetics of activated sludge, and (c) to determine if the combined method (AS-PAC) for Cr(VI) removal can be considered additive or synergistic with respect to the individual processes. Chromate removal was improved by increasing PAC concentrations in both PAC and AS-PAC systems. Cr(VI) removal using the AS-PAC system was higher than using AS or PAC. The increase of Cr(VI) caused longer lag phase and lower observed specific growth rate (lobs), biomass yield (YX/S), and specific growth substrate consumption rate (qS) of activated sludge; additionally, PAC did not enhance the growth kinetic parameters (lobs, YX/S, qS). Cr(VI) reduction in AS-PAC system was the result of the additive effect of each individualCr(VI) removal process.
