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KMID : 0380020070220040244
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Korean Journal of Biotechnology and Bioengineering
2007 Volume.22 No. 4 p.244 ~ p.248
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Integrated Wet Oxidation and Aerobic Biological Treatment of the Wastewater Containing High Concentration of Phenol
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Lee Seung-Ho
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Abstract
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The treatment of a model wastewater containing high concentration, 10 , of phenol in an integrated wet oxidation-aerobic biological treatment was investigated. Partial wet oxidation under mild operating conditions was capable of converting the original phenol to biodegradable organic acids such as maleic acid, formic acid and acetic acid, the solution of which was subjected to the subsequent aerobic biological treatment. The wet oxidation was carried out at 150 and 200 and the initial pH of 1 to 12. The high temperature of 200 and the acidic initial condition in the wet oxidation led to effluents of which biodegradability was higher in the subsequent biological oxidation process, as assessed by chemical oxygen demand (COD) removal. Homogeneous catalyst of was also used for increasing the oxidation rate in the wet oxidation at 150 and initial pH of 3.0. However, the pretreatment with the catalytic wet oxidation resulted in effluents which were less biodegradable in the aerobic biological process compared to those out of the non-catalytic wet oxidation at the same operating conditions.
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KEYWORD
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Phenol wastewater, wet oxidation, biological oxidation, integrated treatment, biodegradability
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