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Assessing the environmental impact of biobleaching: effects of the operational conditions
dc.contributor.author | Valls Vidal, Cristina |
dc.contributor.author | Quintana, Elisabet |
dc.contributor.author | Roncero Vivero, María Blanca |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera |
dc.date.accessioned | 2012-05-14T11:50:44Z |
dc.date.created | 2012-01 |
dc.date.issued | 2012-01 |
dc.identifier.citation | Valls, C.; Quintana, E.; Roncero, M. B. Assessing the environmental impact of biobleaching: effects of the operational conditions. "Bioresource technology", Gener 2012, vol. 104, p. 557-564. |
dc.identifier.issn | 0960-8524 |
dc.identifier.uri | http://hdl.handle.net/2117/15844 |
dc.description.abstract | The 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 toxicity of the effluents from a laccase–HBT (1-hydoxybenzotriazole) treatment. The influence of the laccase and HBT doses, and reaction time, on these effluent properties was also examined. The laccase dose was found to be the individual variable most strongly affecting COD, whereas the oxidized form of HBT was the main source of increased color and toxicity in the effluents. Moreover, it inactivated the enzyme. Oxidation of the mediator was very fast and essentially dependent on the laccase dose. Using the laccase–mediator treatment after a xylanase stage improved pulp properties without affecting effluent properties. This result holds great promise with a view to the industrial implementation of biobleaching sequences involving the two enzymes in the future. |
dc.format.extent | 8 p. |
dc.language.iso | eng |
dc.subject | Àrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera::Blanqueig de pastes |
dc.subject.lcsh | Paper industry |
dc.subject.lcsh | Kraft paper industry |
dc.subject.lcsh | Wood-pulp Bleaching |
dc.subject.other | Biobleaching |
dc.subject.other | Effluent properties |
dc.subject.other | Laccase |
dc.subject.other | Toxicity |
dc.subject.other | Xylanase |
dc.title | Assessing the environmental impact of biobleaching: effects of the operational conditions |
dc.type | Article |
dc.subject.lemac | Paper -- Blanqueig |
dc.contributor.group | Universitat Politècnica de Catalunya. CIPAGRAF - Grup de Recerca Paperer i Gràfic |
dc.identifier.doi | 10.1016/j.biortech.2011.10.044 |
dc.relation.publisherversion | http://www.ncbi.nlm.nih.gov/pubmed/22079687 |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 9695594 |
dc.description.version | Postprint (published version) |
dc.date.lift | 10000-01-01 |
local.citation.author | Valls, C.; Quintana, E.; Roncero, M. B. |
local.citation.publicationName | Bioresource technology |
local.citation.volume | 104 |
local.citation.startingPage | 557 |
local.citation.endingPage | 564 |
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