RT Journal Article
T1 Efficiency of chitosans for the treatment of papermaking process water by dissolved air flotation
A1 Miranda Carreño, Rubén
A1 Nicu, Raluca
A1 Latour Romero, Isabel
A1 Lupei, Mihail
A1 Bobu, Elena
A1 Blanco Suárez, María Ángeles
AB Interest has grown in bio-polymers as being environmental friendly alternatives to synthetic additives. In this work, two native chitosans with different molecular weights have been evaluated on a laboratory scale for their effectiveness for the removal of contaminants from papermaking process waters by dissolved air flotation (DAF). The use of chitosan quaternary derivatives and the use of the native chitosans in combination with anionic bentonite microparticles have also been tested. Results demonstrate a high efficiency of the native chitosan products at intermediate dosages and furthermore, their efficiency is enhanced by the combined addition of bentonite. For an equivalent removal of contaminants, the required dosage of chitosan is about half that the dosage required in absence of bentonite. Quaternary derivatives have not improved the efficiency of the native chitosan in this case. The optimum treatment would be 50 mg/L of native chitosan and 100 mg/L of bentonite where this treatment is capable of the removal of 83- 89% turbidity (residual turbidity 210-320 NTU), 68-71% dissolved turbidity (residual dissolved turbidity of 22-24 NTU), 18-22% total solids (residual total solids of 2750-2900 mg/L) and 19-23% COD (1440-1525 mg/L). The low molecular weight native chitosan is more efficient than the medium molecular weight chitosan in all cases. The Focused Beam Reflectance Measurement (FBRM) is used to assess the aggregation process and to predict the separation efficiency of DAF units either with single or dual systems. The efficiency predicted through the FBRM technique is very similar to that obtained later in the DAF tests.
PB Elsevier
SN 1385-8947
YR 2013
FD 2013
LK https://hdl.handle.net/20.500.14352/33610
UL https://hdl.handle.net/20.500.14352/33610
LA eng
NO Miranda, Ruben, et al. «Efficiency of Chitosans for the Treatment of Papermaking Process Water by Dissolved Air Flotation». Chemical Engineering Journal, vol. 231, septiembre de 2013, pp. 304-13. DOI.org (Crossref), https://doi.org/10.1016/j.cej.2013.07.033.
NO Comunidad de Madrid
NO Ministerio de Educación y Ciencia (España)
NO European Commission
DS Docta Complutense
RD 15 dic 2025