Browsing by Subject "Paper -- Blanqueig"
Now showing items 1-19 of 19
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A neural fuzzy model applied to hydrogen peroxide bleaching of non-wood soda pulps
(2012)
Article
Open AccessA neural fuzzy model was used to examine the influence of pulp bleaching variables of empty fruit bunches from oil palm (EFB) and Hesperaloe funifera, such as soda concentration (0.5-3%), hydrogen peroxide concentration ... -
An approach to industrial application: influence of black liquor and pH on xylanase efficiency in bleaching of eucalyptus kraft pulp
(American Chemical Society (ACS), 2010-11-17)
Article
Restricted access - publisher's policyTo obtain a more realistic appraisal of the potential efficiency of xylanases in the industrial bleaching, the influence of pH and the presence of black liquor (measured as COD) on the bleaching efficiency of two commercial ... -
An improved TCF sequence for biobleaching kenaf pulp: influence of the hexenuronic acid content and the use of xylanase
(2014-01-01)
Article
Restricted access - publisher's policyEnzymatic delignification with laccase from Trametes villosa used in combination with chemical mediators (acetosyringone, acetovanillone and 1-hydroxybenzotriazole) to improve the totally chlorine-free (TCF) bleaching of ... -
Assessing the environmental impact of biobleaching: effects of the operational conditions
(2012-01)
Article
Restricted access - publisher's policyThe environmental impact of enzyme bleaching stages applied to oxygen-delignified eucalypt kraft pulp was assessed via the chemical oxygen demand (COD), color, absorbance spectrum, residual enzyme activity and Microtox ... -
Bleached dissolving pulps applying laccase treatments
(2012)
Conference report
Restricted access - publisher's policyA biobleaching sequence, using a laccase enzyme (Trametes Villosa) in combination with different mediators, was applied to softwood dissolving cellulose in order to study its bleaching efficiency and its potential in terms ... -
Comparative evaluation of the action of two different endoglucanases. Part I: on a fully bleached, commercial acid sulfite dissolving pulp
(2015-04-19)
Article
Open AccessA fully bleached commercial acid dissolving pulp was treated with two endoglucanases, one obtained from Paenibacillus barcinonensis (B) and the other one produced from Cerrena unicolor (F) with the intention to improve ... -
Comparative evaluation of the action of two different endoglucanases. Part II: on a biobleached acid sulphite pulp
(2015-04-30)
Article
Open AccessA TCF sulphite pulp, bleached at the laboratory scale with a laccase–violuric acid system and complemented with a pressurized hydrogen peroxide stage, was treated with two endoglucanases, one obtained from Paenibacillus ... -
Degradation of organic compounds in paper and testile industrial wastewaters by advanced axidation processes
(Universitat Politècnica de Catalunya, 2001-11-16)
Doctoral thesis
Open AccessLes activitats de recerca destinades a la solució dels problemes de contaminació de les aigües estan patint un fort increment en els darrers anys. <br/><br/>Entre les indústries més contaminants, cal esmentar la tèxtil i ... -
Effect of commercial xylanases applied at extreme conditions in a eucalyptus pulp mill
(2012-10)
Article
Restricted access - publisher's policyIn this study, we examined the effect of treating eucalyptus pulp with various commercial xylanases to identify the most effective enzyme for use under the industrial bleaching conditions used at the Jacareí mill of the ... -
Elucidating the effects of laccase-modifying compounds treatments on bast and core fibers in flax pulp
(2012-01)
Article
Restricted access - publisher's policyLaccases in combination with various chemical compounds have been tested with a view to obtain environmental friendly, high-value paper products from unbleached flax pulp, which is currently being assessed as a raw material ... -
Estudio de la obtención de celulosa mediante ozono y métodos biotecnológicos
(Universitat Politècnica de Catalunya, 2017-01)
Bachelor thesis
Restricted access - author's decisionLa materia prima utilizada es eucalipto (Eucalyptus globulus). Se utiliza las astillas de eucalipto y por medio de procesos como la Autohidrólisis y la cocción Kraft seguidamente de procesos de blanqueo como el blanqueo ... -
Integrating a xylanase treatment into an industrial-type sequence for eucalyptus kraft pulp bleaching
(American Chemical Society (ACS), 2012)
Article
Restricted access - publisher's policyThe influence of a treatment with two commercial xylanases on pulp and effluents obtained after the bleaching stages in the OXAZDP (O, oxygen stage; X, xylanase treatment; A, acid stage; Z, ozone stage; D, chlorine dioxide ... -
Laccase for biobleaching of eucalypt kraft pulp by means of a modified industrial bleaching sequence
(2012-09)
Article
Restricted access - publisher's policyBiobleaching of kraft pulp is a possible application of laccase, but it has not been described in detail for complete industrial bleaching sequences yet. Therefore, in this work, the biobleaching of Eucalyptus globulus ... -
New possibilities of kraft pulp biobleaching with laccase and sulfonated mediators
(2011-03)
Article
Restricted access - confidentiality agreement -
Performance of new and commercial xylanases for ECF and TCF bleaching of eucalyptus kraft pulp
(2011-08)
Article
Restricted access - publisher's policySince xylanases can differ widely in their bleaching efficiency, the performance of one new and two commercial xylanases was evaluated in an eucalyptus kraft pulp following XD (X: xylanase; D: chlorine dioxide) and XP (P: ... -
Reutilization of effluents from laccase-mediator treatments of kraft pulp for biobleaching
(2011-02)
Article
Restricted access - confidentiality agreement -
Simulation of bleaching of soda pulp from Hesperaloe funifera by polynomial and neural fuzzy models
(2012)
Article
Open AccessInfluence of variables [soda, (0.5 to 3.0%), hydrogen peroxide (1.0 to 10.0%) and time (1 to 5 h)] in the bleaching of soda pulp of Hesperaloe funifera, on the properties of bleached pulps, was studied. Polynomial and ... -
Use of cyclic voltammetry as an effective tool for selecting effcient enhancers for oxidative bioprocesses: importance of pH
(American Chemical Society (ACS), 2013-01-04)
Article
Restricted access - publisher's policySeven natural phenols and two synthetic compounds were evaluated by means of cyclic voltammetry as enhancers for the oxidation of the lignin model compound veratryl alcohol (VAl) and a sulfonated lignin (SL). Their ...
