RT info:eu-repo/semantics/article
T1 Colour removal from beet molasses by ultrafiltration with activated charcoal
A1 Bernal, Marta
A1 Ruiz Pérez, María Olga
A1 Geanta, Ramona Mihaela
A1 Benito Moreno, José Manuel
A1 Escudero Barbero, Isabel
K1 Chemical engineering
K1 Ingeniería química
AB The feasibility of an activated charcoal/ultrafiltration process for the decolouration of beet molasses, andsubsequent 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 colourreduction of over 98% was achieved at equilibrium using an NPAC concentration of 5 g/L from the beetmolasses at pH 3, with no betaine or sucrose co-adsorptions. Crossflow ultrafiltration experiments withNPAC were performed using a 100 kDa TiO2 tubular ceramic membrane, in order to select the optimaloperating conditions. Experiments with several ultrafiltration stages for the decolouration of beetmolasses, and subsequent regeneration of the exhausted NPAC with sodium hydroxide solutions, werealso performed under the conditions identified previously. A high colour reduction in the molasses ofover 96.5%, with no adsorption of sucrose, betaine, citric acid or lactic acid, was achieved in the firstdecolouration stage at pH 3, with an initial NPAC concentration of 5 g/L, a transmembrane pressure of100 kPa and a feed flowrate of 4.24 L/h. A good NPAC regeneration was obtained, with a loss of its colourremoval capacity lower than 10%.
PB Elsevier
YR 2016
FD 2016-01
LK http://hdl.handle.net/10259/4291
UL http://hdl.handle.net/10259/4291
LA eng
NO Ministerio de Economía yCompetitividad (MINECO, Spain) through project CTQ2011-25239and from the Junta de Castilla y León through projectBU175A11-2
DS Repositorio Institucional de la Universidad de Burgos
RD 24-dic-2024