Wet Air Oxidation of Oily Sludge

Abstract

The article is inclined to report experimental results performed in a batch reactor on the wet air oxidation of oily sludge. It is shown that increasing the reaction temperature can improve chemical oxygen demand (COD) removal significantly, increasing O₂ excess (OE), initial concentration of oily sludge and prolonging reaction time can help to improve the chemical oxygen demand (COD) removal. COD removal is 96.15% under the optimal condition. It is concluded that wet air oxidation is an effective process for removing organic compounds from oily sludge. The intermediate product such as acetic acid (CH₃COOH), carbon monoxide (CO), and the final product such as carbon dioxide (CO₂) is analyzed by liquid chromatography and gas chromatography in the experiment.

Keywords:

• Wet air oxidation
• Oily sludge
• COD removal
• Intermediate product

ACKNOWLEDGMENT

The research is financially supported by the National Science Foundation of China (Grant No.51175066).