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Azo dye wastewater color and high concentrations, contains a lot of biodegradable organic pollutant content, water quality changes, difficult to handle. Using conventional treatment methods such as physical, chemical, biological, or when combined with several methods, dyes tend to be different structure, composition, biodegradability and chemical stability limits of the treatment effect as described above with a dye structure types are closely related. The micro-electrolysis method in the treatment of dye wastewater has wide application, low cost, good effect, easy operation and maintenance features, and the use of iron waste from the chip, no external power supply, with by Waste environmental value. Micro-electrolysis process at home and abroad, there are many studies azo dye wastewater, but using spherical micro-electrolysis filler treatment regularized high concentrations of dye wastewater few studies. To this end, the subject of micro-electrolysis method with methyl orange azo structure for a more comprehensive study of its objects, the concentration of methyl orange solution and COD removal effect of changes in evaluation. This paper experimentally examined the reaction time, pH value, fillers quality, reaction temperature on the experimental results. The results show that the regularization micro-electrolysis filler treatment of high concentration of methyl orange simulated wastewater optimal experimental conditions were: reaction time was 3 hours, pH value of 4, the temperature is 20 ℃, the filler mass 25g, COD removal at this time rate of 72.42%, 81.52% removal rate of methyl orange. To further improve the regularization micro-electrolysis filler removal of methyl orange azo dye effect, and also investigated separately adding different metal oxides (alumina, copper oxide, zinc oxide, manganese oxide) on the experimental results. With no added filler metal oxide electrolysis as a reference. The results showed that the reaction time is long enough, changing the reaction conditions of temperature and pH, adding different metal oxides of the treatment effect of methyl orange as compared with the reference group did not significantly improved, considering the practical application value, decide not to use adding metal oxide electrolysis process simulation methyl orange dye wastewater. In order to investigate the stability and packing the physical properties of the filler, the optimal reaction conditions for the static dynamic operation, a concentration of 1500mg / L, pH of 4 to dyeing wastewater methyl orange analog 6.4cm / h velocity into a glass column. Continuous operation for 20 days, determined through experiments run continuously for a maximum of 18 days, COD removal rate of about 70%, methyl orange removal efficiency of 80%, no significant compaction regularization packing and crushing phenomena.
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