INVESTIGADORES
ZARITZKY Noemi Elisabet
artículos
Título:
Effects of combining biological treatment and activated carbon on hexavalent
Autor/es:
A.M. FERRO OROZCO ; E.M. CONTRERAS ; N.E. ZARITZKY
Revista:
BIORESOURCE TECHNOLOGY
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; 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) renoval can be considered additive or synergistic
with respect to the individual processes. Chromate renoval 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 individual Cr(VI) removal process.