Reduction of Pollutant from Bleached Kraft Pulp Mills by the Process Conversion to ECF Bleaching (Part III)
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چکیده
منابع مشابه
Effluent Loads From Different ECF Bleaching Sequences Used In Hardwood Kraft Pulp Bleaching
Effluent loads from different traditional and emerging ECF bleaching sequences were investigated. Oxygen delignified Eucalyptus camaldulensis and Acacia mangium kraft pulps having similar kappa number, ca 12.0 were used in this study. Different ECF bleaching sequences were compared with reference sequence, D0EopD1 in terms of effluent load, such as AOX, COD and TOC. Depending on the nature of s...
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Corn stalk can be used as an alternative non-wood raw material to produce cellulosic dissolving grade pulp. In this work, the potential of corn stalk in the production of dissolving pulp (alpha-cellulose) was investigated. It was collect ed from a corn stalk farm of Kermanshah, Iran. The sequences of experimental work were: water and acid prehydrolysis at 160˚C for 30min, followed by Kraft pulp...
متن کاملEnzymes Improve Ecf Bleaching of Pulp
The delignification efficiency of different laccase enzymes was examined on the eucalyptus Kraft pulp. The laccase enzyme from Trametes versicolor showing the highest delignification efficiency was selected and used in the elemental chlorine-free bleaching sequence for improving the pulp bleachability. An appreciable reduction in chlorine dioxide consumption was also obtained. Further reduction...
متن کاملKinetics of Ozone Bleaching of Eucalyptus Kraft Pulp and Factors Affecting the Properties of the Bleached Pulp
Ozone is a non-chlorine bleaching agent that can reduce pollution in the pulp bleaching stage. In this work the ozone bleaching of eucalyptus kraft pulp was performed as part of a kinetics study to explain factors affecting the properties of bleached pulp. The bleaching efficiency was closely related to the rates of mass transfer and self-decomposition, as well as the intensity of ozonation. Fo...
متن کاملstudy of enzymatic prebleaching effect on optical properties of bagasse kraft pulp in ecf bleaching
the effect of commercial xylanase enzyme in prebleaching of bagasse kraft pulp was investigated. xylanase enzyme from trichoderma viride was added to pulp at various doses of 5, 10, 25 and 50 iu/g pulp for reaction time 2h and then the enzyme treated pulp was bleached in d1ed2 sequences (using dioxide chlorine 4, 6, 8, 10% + alkaline extraction + dioxide chlorine 2% as active chlorine). the res...
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ژورنال
عنوان ژورنال: JAPAN TAPPI JOURNAL
سال: 2012
ISSN: 0022-815X,1881-1000
DOI: 10.2524/jtappij.66.1408