THE EFFECT OF WATER REDUCTION IN KRAFT PULP WASHING IN ECF BLEACHING

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dc.contributor.authorFrigieri, Tania Cristina [UNESP]
dc.contributor.authorVentorim, Gustavo [UNESP]
dc.contributor.authorComelato Favaro, Jaqueline Silveira [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-11-26T17:18:29Z
dc.date.available2018-11-26T17:18:29Z
dc.date.issued2016-11-01
dc.description.abstractThe main objective of this work was to study the technical viability of using the cellulose bleaching effluent, at several stages of the process, seeking fresh water reduction in pulp washing, and evaluating its effect on pulp quality. Eucalyptus spp. industrial cellulosic pulp with oxygen was used in this experiment. The same bleaching sequence D(E+P) DP was performed ten times, under the same conditions (temperature, consistency and time). Counter current washing was used in the bleaching stages, and each sequence was carried out with different washing factors: 9, 6, 3, 0 m(3) of distilled water/ton of pulp, trying to reach brightness of 92 +/- 0,5% ISO. The ten sequences sought to achieve the stability of the effluent organic load, measured by the chemical oxygen demand (COD). Then, the COD results were compared to the brightness ones from the bleached pulp. The evaluated results from the ten sequences and four different washings showed an increasing in COD due to the organic load accumulation, resulting from the reuse of effluent from previous sequences. This COD increasing provided the lower brightness results during the cycles, besides the water reduction, evidencing the necessity of washing between bleaching stages. In this study, the obtained result for the pulp washing up to 3m(3)/t was tolerable and even recommended. On the other hand, the pulp without any washing (0 m(3)/t), due to the lack of enough brightness, it is commercially unviable.en
dc.description.affiliationUniv Estadual Paulista, Programa Pos Grad Engn Mecan, Guaratingueta, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Itapeva, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Programa Pos Grad Engn Mecan, Guaratingueta, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Itapeva, SP, Brazil
dc.format.extent1101-1108
dc.identifierhttp://dx.doi.org/10.1590/0100-67622016000600015
dc.identifier.citationRevista Arvore. Vicosa: Univ Federal Vicosa, v. 40, n. 6, p. 1101-1108, 2016.
dc.identifier.doi10.1590/0100-67622016000600015
dc.identifier.fileS0100-67622016000601091.pdf
dc.identifier.issn0100-6762
dc.identifier.scieloS0100-67622016000601091
dc.identifier.urihttp://hdl.handle.net/11449/162482
dc.identifier.wosWOS:000394167100015
dc.language.isoeng
dc.publisherUniv Federal Vicosa
dc.relation.ispartofRevista Arvore
dc.relation.ispartofsjr0,458
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectPulp
dc.subjectBleaching
dc.subjectEucalyptus
dc.titleTHE EFFECT OF WATER REDUCTION IN KRAFT PULP WASHING IN ECF BLEACHINGen
dc.typeArtigo
dcterms.rightsHolderUniv Federal Vicosa
unesp.departmentEngenharia Mecânica - FEGpt

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Guaratinguetá - FEG - Faculdade de Engenharia e Ciências
Artigos - Engenharia Industrial Madeireira - Itapeva