Degradation of Refractory Wastewater by Chlorine Dioxide Oxidation

Abstract:

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The ClO2 chemical oxidation system and ClO2 catalytic oxidation system are studied in this paper. The results show that pH=6~8, 1000mg ClO2/L wastewater, reacting 60min are the most efficient and economical, when treating Acid Brilliant Scarlet GR dyestuff wastewater, the COD of which is 3500mg/L, by ClO2 chemical oxidation. The COD removal ratio exceeds 50%, and the oxidation index (COD removal amount/ ClO2 used amount) is 2.3. When treating the wastewater by catalytic oxidation which is composed of ClO2 and special catalyst, pH≈2, 800mg ClO2/L wastewater, reacting 45~60min are the most efficient and economical. The COD removal ratio exceeds 80%, and the oxidation index (COD removal amount/ ClO2 used amount) is 3.5. The cost of oxidant removing 1kg COD is ¥3.7. The effect is superior to that of ClO2chemical oxidation apparently. The study indicates that ClO2 catalytic oxidation is an efficient method to treat refractory wastewater and it’ll have a broad prospect.

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Periodical:

Edited by:

Xuejun Zhou

Pages:

2987-2990

DOI:

10.4028/www.scientific.net/AMM.90-93.2987

Citation:

H. Fang et al., "Degradation of Refractory Wastewater by Chlorine Dioxide Oxidation", Applied Mechanics and Materials, Vols. 90-93, pp. 2987-2990, 2011

Online since:

September 2011

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$35.00

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