Research Of Three-dimensional Electrochemical Technology In Waste Water

Along with the development of industry in China, there are more and more pollution and shortage in our drinking water. There are some limitations in traditional physical, chemical and biological technology. Electrochemical techniques is becoming popular because of it is so called "Environmentally friendly". Traditional two dimensional electrochemical treatments is less than three dimensional. So this study uses three dimensional electrochemical technologies Disposal of waste water. We use stainless steel and graphite rod as battery lead plate and activated carbon as the three dimensional plate, make a research to make sure the treatment effect, the best reaction condition and the reaction mechanism.This study determine the concentration of methyl orange, disperse scarlet, trichloroacetic acid and the COD in different confidents to judge whether this technology is effective and find the best parameters. We can determine the concentration of · OH by electrolyzing salicylic acid,determine the DOC by TOC analyzer, determine the apparent molecular weight by Liquid chromatography gel column and three-dimensional fluorescence contour spectra to study the mechanism of Three-dimensional electrochemical.The breakthrough curves of three dimensional activated-charcoal column shows that there are great treatment in methyl orange, disperse scarlet and trichloroacetic acid. There is a 100% removal rate in 40 hours. The removal rate of power is high than no power, the time of break through and saturation are postponed, and the removal rate of 15V is the most high. The treatment of three dimensional activated-charcoal column is the total of adsorb and electrolysis, so we can get the electrical content through the total content subtract the absorb content.Disposing the water by static analog device in different activated carbon, voltage, plate distance and pH. We get the best response parameter on the removal rate of methyl orange and COD. The removal rate of activated carbon is higher than no activated carbon, and the removal rate of coaly activated carbon is the most high because of its specific surface area and pore size. The treatment effect of 15V is best, there is no effect of microelectrolysis and the content of · OH is low when blow 15V and when overtop 15V there are some secondary reaction made the temperature of solution higher and the shunt displacement current and the short-circuit current are higher but not the reaction current. The treatment effect is best when the plate distance is 10mm.The mass flow is low when it is less than lmm and the electric field action is low on the contrary. There is a better effect when the pH is lower, but it shortage the working life of electrolytic cell and plate, we chose pH 5 as the best in this study.The concentration of· OH is higher when the pressure is 15V is similar to the effect of treating methyl orange. The apparent molecular weight of methyl orange is 600-700, there is no low apparent molecular weight. The three-dimensional fluorescence shows class 3 represent methyl orange, we can judge the concentration by the strength of class three and we found the treatment effect of dynamic device reconfiguration is wonderful up to 95% removal rate and wipe out other impurities in water. The mechanism is indirect oxidation and the organics is turn to CO2 and H2O completely. There is also exist electric flocculation because of we found flocculating constituent in bottom and surface of bath solution.