REVIEW: COD OF KRAFT PULPS ECF AND TCF BLEACHING

Kraft pulping dominates chemical pulps production. Conventional bleaching (using elementary chlorine), generates high contamination, and its effluents content dangerous chlorine derived products, including dioxins and furans. The rigorous environmental policies imposed to the industry by the governm...

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Bibliographic Details
Main Authors:	Barboza, Olga M., Bengoechea, Dora I., Area, María C.
Format:	Online
Language:	Spanish
Published:	Facultad de Ciencias Exactas, Químicas y Naturales 2004
Subjects:	Effluents ECF and TCF bleaching Chemical Oxygen Demand Review Efluentes Blanqueos ECF y TCF Demanda Química de Oxígeno Revisión
Online Access:	https://www.fceqyn.unam.edu.ar/recyt/index.php/recyt/article/view/417

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spelling	ojs-article-4172020-03-06T00:42:22Z REVIEW: COD OF KRAFT PULPS ECF AND TCF BLEACHING REVIEW: DQO EN EFLUENTES DE BLANQUEO ECF Y TCF DE PULPAS KRAFT Barboza, Olga M. Bengoechea, Dora I. Area, María C. Effluents ECF and TCF bleaching Chemical Oxygen Demand Review Efluentes Blanqueos ECF y TCF Demanda Química de Oxígeno Revisión Kraft pulping dominates chemical pulps production. Conventional bleaching (using elementary chlorine), generates high contamination, and its effluents content dangerous chlorine derived products, including dioxins and furans. The rigorous environmental policies imposed to the industry by the government, conduced to the generation of ECF and TCF bleaching sequences. While ECF (elementary chlorine free) bleaching uses chlorine dioxide in spite of Cl2, TCF (totally chlorine free) bleaching includes the use of non chlorine chemicals. Hydrogen peroxide utilization as oxidant agent generates an increase in chelant application. The objective of this work is to resume references about COD (Chemical Oxygen Demand) levels in different effluents, including effluents from brown stock washing, oxygen delignification (O and Op), peroxide bleaching, and chelant addition in different stages (20 bibliographic references). El pulpado Kraft domina la producción de pulpas químicas. El blanqueo convencional (con cloro elemental), genera un elevado nivel de contaminación, y sus efluentes contienen productos peligrosos derivados del cloro, incluyendo dioxinas y furanos. La rigurosa reglamentación medioambiental impuesta a la industria por los organismos gubernamentales, condujo a la generación de secuencias de blanqueos libres de cloro elemental (ECF) y total (TCF). Mientras que el blanqueo ECF emplea dióxido de cloro en lugar de Cl2, el TCF incluye el uso de reactivos no clorados. La utilización de peróxido de hidrógeno como agente oxidante generó un incremento de la aplicación de quelantes. El objetivo del trabajo es compendiar las referencias sobre niveles de DQO (Demanda Química de Oxígeno) en diferentes efluentes, incluyendo el lavado de pulpa marrón, deslignificación con oxígeno (O y Op), blanqueo con peróxido, y aplicación de quelantes en las distintas etapas (20 citas bibliográficas). Facultad de Ciencias Exactas, Químicas y Naturales 2004-06-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.fceqyn.unam.edu.ar/recyt/index.php/recyt/article/view/417 Argentine Journal of Science and Technology; Vol. 6 No. 1 (2004); 61-69 Revista de Ciencia y Tecnología; Vol. 6 Núm. 1 (2004); 61-69 1851-7587 0329-8922 spa https://www.fceqyn.unam.edu.ar/recyt/index.php/recyt/article/view/417/340 Derechos de autor 2004 Revista de Ciencia y Tecnología
institution	Facultad de Ciencias Exactas Quimicas y Naturales
collection	Revista de Ciencia y Tecnologia RECyT
language	Spanish
topic	Effluents ECF and TCF bleaching Chemical Oxygen Demand Review Efluentes Blanqueos ECF y TCF Demanda Química de Oxígeno Revisión
spellingShingle	Effluents ECF and TCF bleaching Chemical Oxygen Demand Review Efluentes Blanqueos ECF y TCF Demanda Química de Oxígeno Revisión Barboza, Olga M. Bengoechea, Dora I. Area, María C. REVIEW: COD OF KRAFT PULPS ECF AND TCF BLEACHING
topic_facet	Effluents ECF and TCF bleaching Chemical Oxygen Demand Review Efluentes Blanqueos ECF y TCF Demanda Química de Oxígeno Revisión
format	Online
author	Barboza, Olga M. Bengoechea, Dora I. Area, María C.
author_facet	Barboza, Olga M. Bengoechea, Dora I. Area, María C.
author_sort	Barboza, Olga M.
title	REVIEW: COD OF KRAFT PULPS ECF AND TCF BLEACHING
title_short	REVIEW: COD OF KRAFT PULPS ECF AND TCF BLEACHING
title_full	REVIEW: COD OF KRAFT PULPS ECF AND TCF BLEACHING
title_fullStr	REVIEW: COD OF KRAFT PULPS ECF AND TCF BLEACHING
title_full_unstemmed	REVIEW: COD OF KRAFT PULPS ECF AND TCF BLEACHING
title_sort	review: cod of kraft pulps ecf and tcf bleaching
title_alt	REVIEW: DQO EN EFLUENTES DE BLANQUEO ECF Y TCF DE PULPAS KRAFT
description	Kraft pulping dominates chemical pulps production. Conventional bleaching (using elementary chlorine), generates high contamination, and its effluents content dangerous chlorine derived products, including dioxins and furans. The rigorous environmental policies imposed to the industry by the government, conduced to the generation of ECF and TCF bleaching sequences. While ECF (elementary chlorine free) bleaching uses chlorine dioxide in spite of Cl2, TCF (totally chlorine free) bleaching includes the use of non chlorine chemicals. Hydrogen peroxide utilization as oxidant agent generates an increase in chelant application. The objective of this work is to resume references about COD (Chemical Oxygen Demand) levels in different effluents, including effluents from brown stock washing, oxygen delignification (O and Op), peroxide bleaching, and chelant addition in different stages (20 bibliographic references).
publisher	Facultad de Ciencias Exactas, Químicas y Naturales
publishDate	2004
url	https://www.fceqyn.unam.edu.ar/recyt/index.php/recyt/article/view/417
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REVIEW: COD OF KRAFT PULPS ECF AND TCF BLEACHING

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