Treatment Of Dyestuff Waster With Intersive Inner Electrolysis-Enhanced Oxidation Combined Process

The composition of dyestuff wasterwater is complicated。high-color, high CODCrand difficult biodegradable were cause serious pollution to the environment。in this dissertation, a combined process of Intersive Inner Electrolysis-Enhanced oxidation was used to treat dyestuff wastewater。The main contents and the conclusions were presented as follows:1 Copper scrap-iron on the process conditions were optimized。The results showed that: Iron electrolytic copper process technology at home and within the electrolysis - H2O2 combined process of significantly affect the process, simply from the electrolysis treatment point of view, the appropriate process conditions: Copper sulfate (percentage of the quality of concentration) concentration of 1 percent to 5 percent, the corresponding time for Copper: Copper sulfate concentration of 1%, 2%, 5%, copper respectively 2。5 min, 1。5 min, 0。5 min。Such as the use of electrolysis - H2O2 combination of methods, appropriate conditions for the copper plating process: CuSO4 concentration = 1%, copper plating time = 2。5 min。2 Enhanced within the electrolysis treatment of dyeing wastewater (CODCr = 1155 mg / L) were studied。The results showed that: (1) electrolysis time is less than 20 min, with the increase in the electrolysis time, the removal rate of increase in the dye, electrolysis, the time for 20 minutes, remove the basic stability of the dye, when the electrolysis time More than 20 min, the increase over time, increase the effect of the dye slow as the ratio of liquid to solid increases, the removal of dye decrease in pH value for the weak acid or a weak base of the circumstances, the dye Removal of better-performing; (2) process technology suitable for the conditions are as follows: copper sulfate concentration of 1%, copper plating time for 2。5 min, the electrolysis time for 20-30 minutes, the solution pH value of 4-6 or 7。5-9。5。3 Enhanced within the electrolysis - catalyzed oxidation dyeing wastewater treatment combinations (CODCr = 1155 mg / L) were studied。The results showed that: (1) enhanced in the electrolysis - catalyzed oxidation combination method is better than enhanced, electrolysis and H2O2 at the same time the role of the methods (2) be dealt with low water CODCr the appropriate conditions for the process: the amount of hydrogen peroxide 4mL / L, the electrolysis time for 20 min, for the time of 20 min, pH value of 4-6, liquid-solid ratio of 2 mL / g, in the conditions, CODCr color and the removal rate reached 93 percent and 100% (3) to achieve "wastewater discharge standards" GB8979-1996 emission standards for a goal, may be of the following conditions: adding hydrogen peroxide capacity of 0。5 ml / L, for the time of 30 min, the electrolysis Time for 20 min, pH value of 4-6, liquid-solid ratio of 2 mL/1g。4 Enhanced within the electrolysis - photocatalytic combination of printing and dyeing waste water treatment (CODCr = 1155 mg / L) were studied。The results showed that: (1) enhanced by the electrolysis treatment of waste water in the dyeing and printing can be realized by adding sodium oxalate photocatalytic wastewater treatment purposes, (2) voted to increase the amount of copper scrap-iron, can improve response time to CODCrIn addition to rate and color removal, appropriate conditions for the process: the amount of sodium oxalate to 4 g / L, liquid-solid ratio of 2 mL/1g, pH values between 3-6 and 10-15 hours of light Hours, the electrolysis time of 20 minutes, the conditions, the treated water can be achieved "wastewater discharge standards" GB8979-1996 level emission standards。...