Wet oxidation of concentrated wastewaters of paper mills for water cycle closing

Wastewater Treatment and Reclamation: A Review of Pulp and Paper Industry Practices and Opportunities

“…Buyukkamaci and Koken (2010) focus on the economic aspects of different wastewater treatment options available for P&P mill effluent. Various authors have considered options of treating the process water so that it can be reused within the normal operations of papermaking (Tenno and Paulapuro 1999;Verenich et al 2000;Webb 2002;Nuortila-Jokinen et al 2004;Hubbe 2007c;Ordóñez et al 2010;Mauchauffee et al 2012;Saif et al 2013). Wider review articles and books dealing with general aspects of wastewater treatment have appeared (Scott and Ollis 1995;Thompson et al 2001;Pokhrel and Viraraghavan 2004;Singh et al 2012;Riffat 2013;Ranade 2014;Spellman 2014;Zhao et al 2014;Hopcroft 2015;Blanco et al 2016;Fatta-Kassinos et al 2016).…”

“…Wastewater-free operation is common in systems in which recycled paperboard products are produced, while generally it is not feasible in pulping operations and white grades. Alternatively, wastewater treatment schemes closely related to those that will be featured in later sections of this review article can, in principle, be implemented within the paper mill's water cycle (Tenno and Paulapuro 1999;Verenich et al 2000;Webb 2002;Nuortila-Jokinen 2004;Hubbe 2007c;Mauchauffee et al 2012;Singh et al 2012;Saif et al 2013). Another approach, which ends up as having the same net effect, has been to employ the final effluent from wastewater treatment as the intake for the papermaking system (Ordóñez et al 2010).…”

“…by implementation of wet oxidation conditions (Bhargava et al 2006). The effectiveness of such systems in treating wastewater from P&P mills has been reported (Verenich et al 2000(Verenich et al , 2001Pintar et al 2001;Akolekar et al 2002;Garg et al 2005Garg et al , 2007Dhakhwa et al 2012). Verenich et al (2000Verenich et al ( , 2001 showed that wet oxidation improved the effectiveness of a subsequent biodegradation stage of treatment.…”

“…The effectiveness of such systems in treating wastewater from P&P mills has been reported (Verenich et al 2000(Verenich et al , 2001Pintar et al 2001;Akolekar et al 2002;Garg et al 2005Garg et al , 2007Dhakhwa et al 2012). Verenich et al (2000Verenich et al ( , 2001 showed that wet oxidation improved the effectiveness of a subsequent biodegradation stage of treatment. Others have demonstrated the ability of catalysts to promote wet oxidation (Verenich et al 2000;Pintar et al 2001;Akolekar et al 2002;Garg et al 2005).…”

“…Verenich et al (2000Verenich et al ( , 2001 showed that wet oxidation improved the effectiveness of a subsequent biodegradation stage of treatment. Others have demonstrated the ability of catalysts to promote wet oxidation (Verenich et al 2000;Pintar et al 2001;Akolekar et al 2002;Garg et al 2005). Bhargava et al (2006) noted that wet oxidation treatments without the use of a catalyst can yield recalcitrant compounds having carboxylic acid functions.…”