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RESEARCH PRODUCT
CHEMICAL PULPING. Oxidative degradation of AOX in softwood-based kraft mill effluents from E C F bleachin g
Suvi TarkkanenJukka Pekka LsoahoRaimo AlénJuha Fiskarisubject
SoftwoodOxidative degradationChemistry020209 energyForestry02 engineering and technology010501 environmental sciencesPulp and paper industry01 natural sciences6. Clean waterChemical pulping13. Climate action0202 electrical engineering electronic engineering information engineeringGeneral Materials ScienceEffluentKraft paper0105 earth and related environmental sciencesdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-11-01 | Nordic Pulp & Paper Research Journal |