Low environmental impact bleaching sequences for attaining high brightness level with eucalyptus SPP pulp

dc.creatorCosta, M. M.
dc.creatorSantos, C. A.
dc.creatorGarcía, J. C.
dc.creatorBarberà, L.
dc.creatorVilaseca, F.
dc.creatorPèlach, M. A.
dc.creatorMutjé, P.
dc.creatorColodette, J. L.
dc.date2017-10-18T13:15:55Z
dc.date2017-10-18T13:15:55Z
dc.date2008-05-07
dc.date.accessioned2023-09-27T21:30:45Z
dc.date.available2023-09-27T21:30:45Z
dc.identifier1678-4383
dc.identifierhttp://dx.doi.org/10.1590/S0104-66322009000100002
dc.identifierhttp://www.locus.ufv.br/handle/123456789/12133
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8961857
dc.descriptionThe alternatives used for minimizing the usage of chlorine dioxide in bleaching sequences included a hot acid hydrolysis (Ahot) stage, the use of hot chlorine dioxide (Dhot) and ozone stages at medium consistency and high consistency (Zmc and Zhc), in addition to stages with atmospheric hydrogen peroxide (P) and pressurized hydrogen peroxide (PO). The results were interpreted based on the cost of the chemical products, bleaching process yields and on minimizing the environmental impact of the bleaching process. In spite of some process restrictions, high ISO brightness levels were kept around 90 % brightness. Additionally, the inclusion of stages like acid hydrolysis, pressurized peroxide and ozone in the bleaching sequences provided an increase in operating flexibility, aimed at reducing environmental impact (ECF Light). The Dhot(EOP)D(PO) sequence presented lower operating cost for ISO brightness above 92 %. However, this kind of sequence was not allowed for closing the wastewater circuit, even partially. For ISO brightness level around 91%, the AhotZhcDP sequence presented a lower operating cost than the others.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherBrazilian Journal of Chemical Engineering
dc.relationVol. 26, N. 01, p. 11 - 22, January/March, 2009
dc.rightsOpen Access
dc.subjectHigh rightness eucalyptus pulp
dc.subjectLow environmental impact
dc.subjectECF-light sequences
dc.subjectPartial bleach plant closure
dc.subjectOperating cost
dc.titleLow environmental impact bleaching sequences for attaining high brightness level with eucalyptus SPP pulp
dc.typeArtigo


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