2024-03-28T10:01:19Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/42912022-12-20T11:41:06Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245
Bernal, Marta
Ruiz Pérez, María Olga
Geanta, Ramona Mihaela
Benito Moreno, José Manuel
Escudero Barbero, Isabel
2016-01
The feasibility of an activated charcoal/ultrafiltration process for the decolouration of beet molasses, and
subsequent regeneration of the exhausted charcoal by thermal and chemical methods, has been examined.
Several activated charcoals were assayed prior to the selection of Norit powdered activated charcoal
(NPAC). The affinity of NPAC for the adsorption of dark colour compounds was studied at 25 C. A colour
reduction of over 98% was achieved at equilibrium using an NPAC concentration of 5 g/L from the beet
molasses at pH 3, with no betaine or sucrose co-adsorptions. Crossflow ultrafiltration experiments with
NPAC were performed using a 100 kDa TiO2 tubular ceramic membrane, in order to select the optimal
operating conditions. Experiments with several ultrafiltration stages for the decolouration of beet
molasses, and subsequent regeneration of the exhausted NPAC with sodium hydroxide solutions, were
also performed under the conditions identified previously. A high colour reduction in the molasses of
over 96.5%, with no adsorption of sucrose, betaine, citric acid or lactic acid, was achieved in the first
decolouration stage at pH 3, with an initial NPAC concentration of 5 g/L, a transmembrane pressure of
100 kPa and a feed flowrate of 4.24 L/h. A good NPAC regeneration was obtained, with a loss of its colour
removal capacity lower than 10%.
application/pdf
http://hdl.handle.net/10259/4291
eng
Elsevier
Colour removal from beet molasses by ultrafiltration with activated charcoal
info:eu-repo/semantics/article
TEXT
RIUBU. Repositorio Institucional de la Universidad de Burgos
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