Study On Degradation Regularity Of Three Characteristic Pollutants Of Pharmaceutical Park Tail Water In A~2O Treatment Process

The wastewater produced in a Pharmaceutical Park of Northeast China contains a large amount of refractory organic matter,and amantadine,phenol and DBP are the three kinds of typical refractory organic pollutants.If the pharmaceutical tail water were discharged into the water body without effective treatment,it would cause great harm to waterbody.A2 O process was used in this study for the treatment of wastewater containing pharmaceutical Park amantadine,phenol,DBP.In order to reduce the effect of other substances in practical wastewater artificially simulated wastewater was used in experiments,to explore the degradation effects of three pollutants under different co-metabolism substrate conditions,and their influences on the biological treatment unit.The research provided theoretical basis and technical reference for the treatment of wastewater containing amantadine,phenol and DBP.The main conclusions are as follows:(1)Under the influent amantadine,phenol,DBP concentrations of 0.7,0.5,0.5 mg/L,and taking glucose,sodium acetate,potassium hydrogen phthalate as the common metabolizing materials,respectively,A2 O process showed no obvious effects on organic matter removal,denitrification and dephosphorization;dosing the above three characteristic pollutants A2 O process did not show obvious inhibitory effect on organic matter removal and denitrification,but showed inhibitory effect on dephosphorization.(2)The average removal rates of amantadine in the anaerobic tank and the secondary sedimentation tank were 32.80 and 32.90%,32.90 and 34.20%,10.50 and 10.50%,by using glucose,sodium acetate and potassium hydrogen phthalate as the metabolites respectively.It is suggested that the degradation of amantadine with sodium acetate and potassium hydrogen phthalate as substrates is more favorable,while the presence of glucose as a metabolizing substrate was not conducive to amantadine degradation.The degradation of amantadine was mainly in the anaerobic tank.The average removal rate of phenol was 97.30,86.60 and 88.70%,respectively.It was found that sodium acetate was used as the co-metabolizing substrate to facilitate the degradation of phenol.The anaerobic environment was beneficial to the degradation of phenol.The degradation of phenol in A2 O process mainly occurred in the anaerobic tank and anoxic tank.The average removal rate of DBP was above 99.5%,which was not easy to be affected by the changes of the three co-metabolism substrates.(3)The microbial population community in A2 O system was analyzed,and a total of 38 phyla,69 classes,97 orders,214 families and 777 genera were classified.Screening richness greater than 1% for analysis,11 phyla,16 classes,22 orders,25 families and 36 genera,respectively.In bacteria of the genus Aeromonas were widespread in the phase III and phase IV of the anaerobic,anoxic and aerobic three reaction stages,so the Aeromonas might be the beneficial degradation strains to amantadine,phenol and DBP.