Journal of Industrial and Engineering Chemistry, Vol.20, No.2, 710-716, March, 2014
Co-treatment systems combined with unit processes for dye wastewater recycling
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In this paper, co-treatment systems were configured to recycle dye wastewater by combining unit processes such as membrane separation, ozone oxidation and electrolysis. In our previous study of cotreatment with membrane separation and ozone processes (modes 1.3), it was found that ozone oxidation with enriched oxygen was effective in removing dye wastewater. Additional two co-treatment systems (mode 4: membrane separation and electrolysis and mode 5: mode 4 + ozone process with enriched oxygen) were configured in this paper and operated continuously for 24 h. Compared to our previous results, co-treatment systems with electrolysis were found to further enhance the removal efficiencies of organic matter, T-N and T-P by 4, 20 and 15%, respectively. Especially, their color removal efficiencies were about 75-85 and 93% with modes 4 and 5, respectively, indicating that co-treatment with electrolysis is an excellent system in color removal.
Keywords:Dye wastewater recycle;Membrane separation;Ozone;Electrolysis;Co-treatment and color removal
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