Desenvolvimentos da biopolpação no Brasil

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dc.contributor.authorFerraz, André [UNESP]
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:22:32Z
dc.date.available2014-05-27T11:22:32Z
dc.date.issued2007-07-01
dc.description.abstractBiopulping is a technology which application can be advantageous to mechanical or chemical pulping. It presents benefits such as the creation of stronger pulp, as well as energy or chemicals savings. This paper gives an overview of the recent efforts to develop biopulping processes in Brazil as well as provides critical information on biopulping development worldwide. Eucalyptus grandis wood chips have been biotreated by Ceriporiopsis subvermispora in a 50-ton biopulping pilot-plant and used to produce TMP and CTMP pulps on a mill scale, Up to 18% and 27% energy savings have been observed for producing 450-470 CSFreeness TMP and CTMP pulps. Despite darker bio-TMP pulps are produced, one-stage bleaching with 5% H2O2 was sufficient to improve brightness values to 70% and 72% for bio-TMP and control pulps, respectively. Understanding biopulping mechanisms is also relevant because more resistant and competitive fungal species could be selected with basis on a function-directed screen-ing project. As far as the chemical changes induced by the fungus in wood are concerned, recent efforts have pointed out for two different types of wood transformations. One of them involves intense lignin depolymerization in short biotreatment periods, while the other indicates that esterification reactions of oxalate secreted by the Jungas on the polysaccharides chains increase the water saturation point of the fibers. Both transformations are expected to affect the fiber-fiber bonding and, consequently, the physical resistance of wood.en
dc.description.affiliationEscola de Engenharia de Lorena Universidade de São Paulo, Lorena, SP
dc.description.affiliationLorena's Engineering School São Paulo State University, Lorena, SP
dc.description.affiliationEscola de Engenharia de Lorena Universidade de São Paulo, CP 116, 12602-810 Lorena, SP
dc.description.affiliationUnespLorena's Engineering School São Paulo State University, Lorena, SP
dc.format.extent44-53
dc.identifierhttp://www.revistaopapel.org.br/publicacoes.php?id=178
dc.identifier.citationO Papel (Brazil), v. 68, n. 7, p. 44-53, 2007.
dc.identifier.file2-s2.0-36349019144.pdf
dc.identifier.issn0031-1057
dc.identifier.scopus2-s2.0-36349019144
dc.identifier.urihttp://hdl.handle.net/11449/69781
dc.language.isopor
dc.language.isoeng
dc.relation.ispartofO Papel (Brazil)
dc.relation.ispartofsjr0,104
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectBiopulping
dc.subjectCellulose
dc.subjectLignin
dc.subjectPulp and paper
dc.subjectWood biodegradation
dc.subjectBleaching
dc.subjectBrazil
dc.subjectChemical pulp
dc.subjectPaper and pulp industry
dc.subjectBiotreatment periods
dc.subjectFiber-fiber bonding
dc.subjectBiodegradation
dc.subjectLignins
dc.subjectPulp Industry
dc.subjectPulping
dc.titleDesenvolvimentos da biopolpação no Brasilpt
dc.title.alternativeBiopulping developments in Brazilen
dc.typeArtigo

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