Wet air oxidation (WAO) for the treatment of industrial wastewater and domestic sludge. Design of bubble column reactors

Effects of operational conditions on sludge degradation and organic acids formation in low-critical wet air oxidation

“…Subsequently, a technology to replace the current sludge treating process is a prerequisite, and the thermal oxidation (TO) was applied in this study to develop an alternative sludge reduction technology. Wet air oxidation (WAO) among TO methods is considered suitable for highly concentrated organic matters including difficult-to-decompose ones, excretions, or sludge containing small amount of organic matters when incinerated and biologically processed [1][2][3][4][5][6]. The WAO accomplishes oxidation at elevated temperatures (150-325 • C) and oxygen pressures (10-200 atm).…”

Techno-economic and environmental assessment of sewage sludge wet oxidation

“…Within this project, wet oxidation (WO) is proposed for a drastic reduction of the volume of sewage sludge to be disposed, obtained by extremely reducing the volatile sludge content. WO has been applied for almost 100 years for the treatment of both sewage sludge and high strength industrial wastewaters (Strehlenert 1911;Zimmermann 1958;Ploos Van Amstel 1971;Ploos Van Amstel and Rietema 1973;Devlin and Harris 1984;Seiler 1987;Foussard et al 1989;Joglekar et al 1991;Mishra et al 1995;Debellefontaine et al 1996;Duprez et al 1996;Schmidt and Thomsen 1998;Debellefontaine et al 1999;Khan et al 1999;Luck 1999;Zerva et al 2003), and in recent years, a renewed interest in WO of sewage sludge has emerged, as confirmed by the number of recent publications (Pérez-Elvira et al 2006;Jaroslaw and Roman 2008;Yang et al 2010;Abe et al 2011;Gielen et al 2011;Strong et al 2011;Padoley et al 2012;Strong and Gapes 2012;Baroutian et al 2013).…”

Size distribution and Sauter mean diameter of micro bubbles for a Venturi type bubble generator

“…Some examples include wine industry (Devatine et al, 2007), waste water treatment (Terasaka et al, 2011;Konsowa, 2003;Debellefontaine et al, 1999) and growth enhancement of aerobic organisms (Ago et al, 2005). Applicability of microbubbles in industrial processes results mainly from the following properties:…”