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CHEMICAL PULPING. Oxidative degradation of AOX in softwood-based kraft mill effluents from E C F bleachin g
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Jukka Pekka lsoaho
,
Suvi Tarkkanen
Published/Copyright:
November 8, 2018
Abstract
Softwood-based kraft mill bleaching effluents from the initial bleaching stages D0 and E1 (the bleaching sequence being D0E 1D 1 E2D2) were treated by the oxidative Fenton method (H20rFeS04) to decompose organic pollutants contammg adsorbable organic halogens (AOX). Experiments designed using the Taguchi method were applied to predict the process conditions that would result in a cost-effective and adequate removal of AOX. In addition to the composition and concentration of the reagents (H202 and Fe2+), the main process parameters selected were temperature and reaction time, while pH was adj usted to an approximate value of 4 (the volumetric ratio of the mixed effluents D0:E 1 was 3 :2). The results indicated that an AOX removal of about 70% for this mixture ( corresponding to about 50% for the mill) was achieved when the eftluent samples were treated for 60 min at 70°C with H202 and Fe2+ at a concentration of 1 600 mg/1 and 28 mg/1, respectively.
Received: 2012-02-07
Accepted: 2012-04-12
Published Online: 2018-11-08
Published in Print: 2012-11-01
© 2018 by Walter de Gruyter Berlin/Boston
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Keywords for this article
Bleach eftluent;
Kraft pulping;
AOX;
Chlorinated organic compounds;
Fenton;
Taguchi
Articles in the same Issue
- Contents
- BIOREFINERY. Pressurised hot water extraction of acetylated xylan from birch sawdust
- BIOREFINERY. Nanocellulose characterization with mechanical fractionation
- MECHANICAL PULPING.Analysis method of high-consistency chip refiner forces
- MECHANICAL PULPING.Effect of long fibre concentration on low consistency refining of mechanical pulp
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- COATING. lnfluence of the distribution of the shape and size distribution of pigment particles on cracking in coating layers during creasin
- PRINTING.Natural zeolite as filler in base ink jet paper sheet
- PRINTING.Paper and printer effects on xerographic print quality
- PRINTING. The ageing resistance of offset and electrophotographic prints
- PAPER INK INTERACTIONS. The effect of coating pore structure and geometry on the drying efficiency of heatset web-offset ink solvent
- PAPER INK INTERACTIONS. Impact of oil-binder interaction on pore structure in paper coating as studied by internal reflectance Part 1 : implications of pore volume loss for print drying
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- PAPER PHYSICS. PIV measurements of flow through forming fabrics
- PAPER PHYSICS .The effect of newsprint furnish composition and sheet structure on wet pressing efficiency
- PAPER PHYSICS. The web structure in relation to the furnish composition and shoe press pulse profiles during wet pressing
- PAPER PHYSICS. Analytical Prediction of Package Collapse Loads-Basic considerations
- PAPER PHYSICS. Paper-based device for pre-concentration of target analytes
