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Oxidation of Polyvinylpyrrolidone and an Ethoxylate Surfactant in Phase‐Inversion Wastewater
In this paper, components of an industrial wastewater that cause operational problems during biological treatment were oxidized by UV light and hydrogen peroxide (UV/H 2O 2). Preoxidation of wastewater was shown to remove polyvinylpyrrolidone (PVP) and ethoxylate surfactant and increase overall biodegradability. Several UV intensities and hydrogen peroxide concentrations were tested to find optimal conditions for the complete depolymerization of PVP in a synthetic wastewater composed of high concentrations of hydroxyl radical scavengers. To compare treatment options, absorption isotherms for PVP on granular activated carbon (GAC) in water and in the synthetic phase‐inversion wastewater matrix were determined. The data were extrapolated to estimate the cost of using UV/H 2O 2, GAC, or off‐site treatment. It was found that UV/H 2O 2 pretreatment was economically viable. Incomplete oxidation of an ethoxylate surfactant increased foaming tendency and foam stability; however, extended oxidation (>90 minutes) destroyed the foam.
Oxidation of Polyvinylpyrrolidone and an Ethoxylate Surfactant in Phase‐Inversion Wastewater
In this paper, components of an industrial wastewater that cause operational problems during biological treatment were oxidized by UV light and hydrogen peroxide (UV/H 2O 2). Preoxidation of wastewater was shown to remove polyvinylpyrrolidone (PVP) and ethoxylate surfactant and increase overall biodegradability. Several UV intensities and hydrogen peroxide concentrations were tested to find optimal conditions for the complete depolymerization of PVP in a synthetic wastewater composed of high concentrations of hydroxyl radical scavengers. To compare treatment options, absorption isotherms for PVP on granular activated carbon (GAC) in water and in the synthetic phase‐inversion wastewater matrix were determined. The data were extrapolated to estimate the cost of using UV/H 2O 2, GAC, or off‐site treatment. It was found that UV/H 2O 2 pretreatment was economically viable. Incomplete oxidation of an ethoxylate surfactant increased foaming tendency and foam stability; however, extended oxidation (>90 minutes) destroyed the foam.
Oxidation of Polyvinylpyrrolidone and an Ethoxylate Surfactant in Phase‐Inversion Wastewater
Loraine, Gregory A. (author)
Water Environment Research ; 80 ; 373-379
2008-04-01
7 pages
Article (Journal)
Electronic Resource
English
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