Post-Treatment of Pulp and Paper Industry Wastewater by Advanced Oxidation Processes

Removal of 1,4-dioxane from industrial wastewaters: Routes of decomposition under different operational conditions to determine the ozone oxidation capacity

“…At pH 10.0±0.1, a COD removal close to 90% (P<0.050) was reached, while at pH below 9, the COD removal decreased considerably: 60% of COD was degraded at pH of 8.5±0.1, and only a 20% removal was achieved at pH=7.0±0.1. This phenomenon shows that the OH• produced in ozonation at high pH [14,28,[41][42][43][44] is a dominant oxidant for 1,4-dioxane and its decomposition intermediates, and that the reaction by molecular O3 at lower pH conditions has a very low efficiency in the treatment of this particular compound.…”

The application of advanced oxidation technologies to the treatment of effluents from the pulp and paper industry: a review

“…In addition, Sevimli (2005) reported that color was effectively eliminated by this treatment method from pulp industry effluents that were biologically pre-treated; as well as it was proven the superiority of this process to more effectively remove refractory organics (COD removal = 83%; Table 2) processes. In addition, it is also a more economic AOPs-based treatment alternative .…”

“…Particularly, Sevimli (2005) and Balabaniç et al (2012) reported a 20% COD removal improvement when this treatment combination was applied to effluents from a biologically treated corrugated board factory and a recycled paper mill. In turn, Ko et al (2009) reported an increase of color removal, but no effect on the reduction of the COD, when they treated diluted weak black liquor from a hardwood kraft pulp mill.…”

“…Particularly, the success of ozonation applied to real wastewater from pulp and paper mills, whether biologically pre-treated or not, and effluents from bleaching stages, has been mainly attributed to the effective degradation of toxic lignin products and chlorophenolic compounds (Amat et al 2005b;Balcioglu et al 2007;Bierbaum et al 2012;Bijan and Mohseni 2004;Bijan and Mohseni 2005;Catalkaya and Kargi 2007;Fontanier et al 2005b;Fontanier et al 2006;Mansilla et al 1997;Oeller et al 1997;Rodríguez et al 1998;Roy-Arcand and Archibald 1996;Salokannel et al 2007;Sevimli 2005;Wang et al 2004;Yeber et al 1999a;Yeber et al 1999b). As it has additionally been reported in several other essays, ozonation usually increases the biodegradability of paper mill effluents as well (Amat et al 2005a;Balcioglu et al 2007;Bijan and Mohseni 2004;Bijan and Mohseni 2005;Fontanier et al 2006;Helble et al 1999;Mansilla et al 1997;Nakamura et al 1997;Oeller et al 1997;Roy-Arcand and Archibald 1996;Salokannel et al 2007); mainly because of the successful degradation of certain toxic compounds and the promoted changes in molecular weight fractions from HMW to LMW (Amat et al 2005a;Balcioglu et al 2007;Bauman and Lutz 1974;Fontanier et al 2006;Hostachy et al 1997;Mansilla et al 1997).…”

“…Regarding the conditions under which ozonation was performed, several authors have reported that ozone resulted more effective in basic media (Amat et al 2004;Amat et al 2005b;Bijan and Mohseni 2005;Sevimli 2005;Wang et al 2004), just as it was expected due to the more effective generation of hydroxyl radicals, which is a better oxidizing agent than molecular ozone (Bijan and Mohseni 2005;Glaze et al 1987); although working under basic conditions also implies bearing with the presence of possible scavengers like carbonate or bicarbonate (Barndõk et al 2012;Bijan and Mohseni 2005). Putting it all together, no significant different treatment effectiveness was found between pH = 9 and 11 (Bijan and Mohseni 2005), but a significant lower treatment efficiency was addressed when pH was adjusted to neutral (Wang et al 2004).…”