| dc.description.abstract | Now, CF slide manufacturers yet regard chromium metal or the chromium oxide as the dark frame (Black Matrix) material. Acrylic resin is a general coating for CF. Potassium hydroxide, has the advantage that can prevent Black Matrix frame from clearing out substrate, is the cleaning drug for removing acrylic resin. The glass substrate is to be regenerated. The wastewater from the process could contain KOH up to 1.7 M and the conductivity up to 45 mS cm-1. The research of electrolysis - electrodialysis is that the resulting wastewater can be further treated by catalytic wet oxidation.
By the derived current density equation and applied voltage equation, the factors affecting both the current and voltage efficiencies found as：current density , concentration and flow velocities of the electrolytic solution.
The three compartments system is Pt-Ti / (1)KCl(aq) /C / (2) KOH(aq) /A / (3) wastewater / C / (4) KOH(aq) /Steel. The A and C are Asahi AHT anion membrane and Asahi CMV cation membrane, respectively.
By choose the proper experiment condition, operate for 90 minutes, the original wastewater diluate 80% of current efficiency, 80% of recover efficiency of potassium hydroxide.
Using the method of multiple regression to find dimensionless groups of the operation variables, we can get the equations for current and voltage efficienies.
Under the condition：I = 7.11 A dm-2 , u = 4.83 cm s-1 , d = 0.4 cm, the integral εc = 80 %. From the above results, a suitable set of operating conditions for two and three pairs ion exchange membranes are also studies, respectively. The results show that the capability of recovering KOH is almost proportional to the number of the pairs of the C and A. | en_US |