Experiment Research On The Oil Extraction Wastewater By The Treatment Of Ceramic Membrane

Through routine and the optimal experimental conditions of combination treatment process,and analyzing the treatment of oil extraction wastewater effluent water quality standards,we can draw the following conclusion : air floatation process optimal operation parameters for the dissolved air pressure 0.4 MPa,gas water ratio 1:11,the removal rate of the suspended matter,oil content,COD and viscosity were 30%,68%,11.5% and 30% respectively,almost no removal efficiency of polymer and surfactant;Coagulation process of optimal dosing quantity of 30 mg/L,pH around 6 ~ 8,the removal rate of COD,suspended solids,oil content and polymer were 42.89%,98.2%,96.98% and 42.89% respectively;Sand filtration process of optimal filter speed 3.1 m/h,the removal rate of the suspended matter,oil content,COD and polymer were 94%,87.7%,12% and 94%respectively,almost no removal efficiency of viscosity,surface active agent.Monomer treatment effluent oil content,suspended solids removal rate is over90%,but for the polymer and COD,the removal rate is low,the water cannot achieve“double 20”or “5 1 1” back to the standard,water injection and combination process “air flotation— ozone oxidation”and “electrochemical-coagulation”effluent can reach the “double 20” water standard,but can't reach the standard “5 1 1”back to the water injection,reinjection underground existence to the formation of the hazards.Using “double membrane”system treated water flooding and ASP floodi-ng wastewater,through the experimental analysis,we can conclud that the c-eramic membrane flux decline obviously;Strong and strengthen cleaning ope-ration for a period of time row,can increase the ceramic membrane runningtime;Ceramic membrane water flooding wastewater treatment 8 h row of st-rong,stable operation,the ternary flooding wastewater treatment 4 h thick o-ne,stable operation of 31.6 h,water can achieve stable “5 1 1” back to the standard water injection.Water drive membrane pollution using sodium-hydroxide+sodium hypochlorite cleaning effect is good,the ternary displaceme-nt membrane pollution using sodium hydroxide+EDTA+ nitric acid cleaning e-ffect is remarkable.