Evaluation of Chloroform Emission at an ECF Bleaching Pulp Mill
JAPAN TAPPI JOURNAL, 2008 日本の紙パルプ産業では，クロロホルム，ベンゼン，ホルムアルデヒドの3物質を対象とする「有害大気汚染物質排出自主削減計画」を1997年に策定し，3年間をかけて削減計画に取り組んだ。その後，2004年度からはPRTR法に基づく自主的な削減に移行し，2005年度のPRTRデータでは大気へのクロロホルム排出量は年間423tに減少した。これらのクロロホルム削減効果は主に塩素漂白からECF漂白への転換によるものである。クロロホルムの規制は米国では排水に対するものであり，日本では大気に対するものであるので，ECF漂白への転換によるクロロホルム削減効果を大気側と水質側の両面から総合的に検証する必要がある。日本のLOKP漂白工場のほぼ全数が塩素漂白からECF漂白に転換された現在において ...
Nakamata, Keiichi +2 more
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Effect of the final ECF bleaching stage on Eucalyptus Kraft pulp properties : a comparison between hydrogen peroxide and chlorine dioxide [PDF]
, 2009 The factors contributing to the differences between chlorine dioxide and hydrogen peroxide final ECF bleaching stages are discussed with respect to the properties of Eucalyptus globulus kraft pulps.
Loureiro, P.E.G. +7 more
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BioResources, 2016 A potentially more environmentally compatible approach was evaluated, involving the use of an enzyme (X) stage optimally inserted into various bleaching sequences for Eucalyptus kraft pulps.
Avdhesh K. Gangwar +2 more
doaj +1 more source
Application of High Consistency Ozone Bleaching in ECF Sequences
JAPAN TAPPI JOURNAL, 2000 Ozone bleaching has been applied in ECF and TCF bleaching sequences since the beginning of the 1990's. It has confirmed by actual data and laboratory tests that applying the ozone system in ECF sequence can save bleaching chemical costs and makes the plant with a very simple sequence without acid treatment or other treatment.In this paper, a simple ...
Bokusröm, Monica, Kobayashi, Toru
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Obtenção, caracterização e aplicação de nanocristais de celulose obtidos a partir do sisal [PDF]
, 2013 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2013.Este trabalho teve como objetivo estudar o efeito do processo de branqueamento da fibra ...
Mariano, Marcos
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Use of a Novel Extremophilic Xylanase for an Environmentally Friendly Industrial Bleaching of Kraft Pulps. [PDF]
Int J Mol Sci, 2022 Almeida N +11 more
europepmc +1 more source
Selective hydrolysis of hexenuronic acid groups and its application in ECF and TCF bleaching of kraft pulps [PDF]
, 1999 During kraft pulping a major part of the 4-0-methylglucuronic acid groups of the native wood xylans are converted to 4- deoxyhex-4-enuronic acid groups (HexA).
Vuorinen, Tapani +4 more
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Influence of process variables of ECF Ep bleaching stage
, 2009 Kraft pulp bleaching is difficult, since residual lignin does not dissolve in a single stage with chlorinated compound application. Multiple stages using a significant amount of reagents are necessary to obtain high levels of brightness. The inclusion of hydrogenperoxide in the last alkaline stage of the ECF (Elemental Chlorine Free) bleaching of kraft
Mendez, Claudia Marcela +1 more
openaire +2 more sources
Comparative study of lipophilic extractives of hardwoods and corresponding ECF bleached kraft pulps
BioResources, 2006 The lipophilic extractives of Eucalyptus globulus , Eucalyptus grandis , Eucalyptus urograndis , Betula verrucosa and Acacia mangium woods and of the corresponding ECF bleached kraft pulps, were characterised by GC-MS.
Pascoal Neto, C. +5 more
doaj