Experimental Study On The Treatment Of Lube Oil Wastewater By Electro-catalytic Oxidation

With the development of economy and the progress of society,water pollution is becoming more and more serious.In particular,the treatment of refractory organic pollutants in water has become a key and difficult point in the field of water treatment.For refractory organic pollutants in water,electrocatalytic oxidation water treatment technology is very suitable as a clean treatment process.This work focused on the experimental study of electrocatalytic oxidation method in the treatment of lube oil containing wastewater.Through the in-depth study of electrolysis experiment by changing different anode materials,it was found that each of the three anode materials has advantages and disadvantages:IrO₂-RuO₂/Ti Titanium mesh electrode electrolysis efficiency is higher,the price is more expensive;PbO₂/Ti titanium mesh electrode is relatively cheap,but the electrolysis efficiency is slightly lower;PbO₂/Ni foam nickel electrode has good electrolytic efficiency but short service life.On IrO₂-RuO₂/Ti titanium mesh electrode as anode material of lubricating oil wastewater by catalytic oxidation process,by changing the current density,concentration of electrolyte,electrode spacing and the size of the voltage,these factors of COD in waste water treatment effect,the study found that the best experimental conditions for:current density of 0.03 A/cm²,electrolyte concentration of 10 g/L,electrode spacing is 3 cm,voltage of 10 V,100 min,electrolytic time under this condition,the waste water COD removal rate reached 79.7%.PbO₂/Ti titanium mesh electrode was used as anode material to electrolyze lube containing wastewater.By changing different parameters?electrolysis time,current density,electrolyte concentration,plate spacing and voltage?,the influence of these factors on the degradation effect of wastewater was investigated,and the optimal experimental conditions were obtained.The results show that when the current density is 0.03A/cm²,the electrolyte concentration is 10g/L,the plate spacing is 3cm,the voltage is 10V,and the electrolysis is100min,the removal rate of COD in wastewater can reach 72.5%under this condition.Based on nickel foam substrate material,using the thermal oxidation of PbO₂/Ni foam nickel electrodes,electrolysis time and current density,voltage,concentration of electrolyte on the effects of the electrochemical study found that at low voltage,low current,extend the time of electrolysis conditions,anode material of lubricating oil containing wastewater has better degradation effects,anode material has a longer service life at the same time.By changing the current density,voltage,plate spacing and electrolyte concentration,the influence of these factors on the electrolysis effect was investigated,and the optimal experimental conditions were obtained:when the current density is 0.01A/cm²,voltage U=4V,plate spacing is 2cm,electrolyte concentration is 10g/L,and the electrolysis time is 200min,under this condition,the COD removal rate can reach 78.5%.The research work in this paper shows that the electrocatalytic oxidation can effectively degrade the lube containing wastewater,which provides a certain theoretical basis for the electrocatalytic oxidation technology in the treatment of refractory organic pollutants.