Application of Ozonation Process In Industrial Wastewaters: Textile, Kraft E₁And Whey Effluents

Abstract

A large variety of organic and inorganic compounds can be found in wastewater from industrial processes. In this work, Advanced Oxidative Processes (AOPs) have been applied for the control of water pollution and the ozonation of different effluents was investigated. Wastewater from textile, kraft E1 and cheese manufacturing processes were chosen as examples of industrial effluents. The efficiency of substrate mineralization has been comparatively analyzed by the decrease in total organic carbon (TOC), color, and toxicity. The results revealed that the ozonation process can be a method for decolorization of effluent, but it is not effective for TOC reduction. The whey effluent was the most recalcitrant wastewater for ozone treatment which produced no TOC removal.

Decolorisation of exhausted reactive dye bath using ozonator for reuse

“…These results are in line with the decolorisation efficiency of 95% (Balcioglu and Arslan, 2001), 71 % (Ramasamy et al, 2001) and 90 % at 5 min ozonation time (Assalin, et al, 2004) at ozone dose of 15 and 14g/L respectively. Complete color removal of dye bath at 60 min ozonation time has also been reported (Balcioglu and Arslan, 2001; at an ozone dose of 35 mg/L.…”

Electrochemical treatment of deproteinated whey wastewater and optimization of treatment conditions with response surface methodology

“…The efficiency of ozonation process was studied with different doses of ozone from 7 to 14 mg/L and different initial pH values of the effluent changing between 4 and 10. Studies demonstrated that ozonation is not an effective technique at all in none of the conditions for the treatment of whey wastewater due to high organic load [74,75].…”

A Review on the Applications of Ozonation for the Treatment of Real Agro-Industrial Wastewaters

“…According to Assalin et al (2004a), ozonation was unable to completely mineralize Kraft E 1 effluent (TOC removal of 20%); however, this technology promoted high toxicity abatement (measured by Selenastrum capricornutum algal growth inhibition). The effect of ozone inlet concentration and pH was analyzed on the depuration of a similar wastewater (Assalin, et al 2004b) and it was verified that the ozonation degradation rate was slower for pH 12 when compared with pH 10, which may be related with radical scavengers present in the liquid.…”