THE EFFECTS OF ALKALINE FILTRATE RECIRCULATION TOWARDS THE PROPERTIES OF LONG FIBER PULPS WITH OD(EPO)DED BLEACHING SEQUENCE

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dc.creatorLuciana Cerqueira Souza
dc.creatorAntonio Jose Vinha Zanuncio
dc.creatorJorge Luiz Colodette
dc.date2018
dc.date.accessioned2026-07-07T02:41:15Z
dc.descriptionCircuit closure can reduce water consumption, but negative effects on pulp quality and equipment wear may make it unfeasible. This study aimed to evaluate how the alkaline filtrate of the recirculation stage (EP) affects bleaching, pulp quality and characteristics of the filtrates produced. Pre-delignified cellulose pulp from a mixture of three coniferous woods was used. Bleaching followed the D(EPO)DED sequence, with the addition of 5, 10 and 15 kg.odt-1 of the alkaline filtrate (EP) to the pre-O2 pulp. The physical and mechanical cellulosic pulp properties were evaluated in the control and with 10 kg.odt-1 of the alkaline filtrate. The inorganic compound accumulation in the system was evaluated in the control pulp and with 15 kg.odt-1 of the alkaline filtrate. The filtrate use increased the ClO2 consumption for bleaching and sulfuric acid and NaOH to adjust the pH of the stages. The pulp tensile index was higher and the tear index lower with the filtrate use in pulp without refinement, however the properties of refined pulp were similar between treatments. The filtrate increased the calcium, chloride, sodium and sulfate levels in the D stage and that of sodium and sulfate after the (EPO) stage. Filtrate recirculation can reduce water use, but it increases bleaching costs and metal accumulation in the system.
dc.formatapplication/pdf
dc.identifier0104-7760
dc.identifierhttps://www.redalyc.org/articulo.oa?id=74460167009
dc.identifierhttps://www.redalyc.org/journal/744/74460167009/
dc.identifierhttps://www.redalyc.org/journal/744/74460167009/html/
dc.identifierhttps://www.redalyc.org/journal/744/74460167009/74460167009.epub
dc.identifierhttps://www.redalyc.org/journal/744/74460167009/movil
dc.identifier10.1590/01047760201824032528
dc.identifier.urihttp://hdl.handle.net/123456789/421498
dc.languageen
dc.publisherUniversidade Federal de Lavras
dc.relationhttp://www.redalyc.org/revista.oa?id=744
dc.rightsCERNE
dc.sourceCERNE (Brasil) Num.3 Vol.24
dc.subjectAgrociencias
dc.titleTHE EFFECTS OF ALKALINE FILTRATE RECIRCULATION TOWARDS THE PROPERTIES OF LONG FIBER PULPS WITH OD(EPO)DED BLEACHING SEQUENCE
dc.typeartículo científico

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CERNE - Universidade Federal de Lavras