Study on the treatment of multiple new pollutant compound pollution by ozone activated carbon process
Taking emerging pollutants such as SD,SMZ,HCB,malathion,and BPA that can be detected in a water basin in the south as the research object,a composite new pollutant co exist-ing raw water spiking treatment experiment was conducted to study the treatment effect of pre-treatment+conventional treatment+ozone activated carbon process.The results indicate that SD,SMZ,BPA and CODMn all have good correlation.The removal rates of SD,SMZ,HCB,malathi-on,and BPA by the biological pretreatment process are 23.97%,21.20%,6.08%,16.26%,and 23.76%,respectively.The optimal residence time for biological pretreatment is 120 minutes,and the optimal gas water ratio is 1∶2.The removal rates of SD,SMZ,HCB,malathion,and BPA by conventional treatment processes are 18.02%,20.08%,23.02%,8.26%,and 16.53%,respec-tively.The optimal dosage of coagulants for SMZ and malathion in conventional treatment is 15 mg/L,while the optimal dosage of coagulants for the other three new pollutants is 20 mg/L;The removal rates of SD,SMZ,HCB,malathion,and BPA by the deep treatment process are 49.13%,53.80%,60.20%,77.07%,and 71.50%,respectively.The optimal ozone dosage for deep treatment is 3 mg/L,the optimal ozone contact time is 24 minutes,and the optimal carbon bed retention time is 25 minutes.The experimental process has a good removal effect on composite new pollutants,with a total removal rate of 69.86%,73.10%,73.65%,83.74%,and 82.72%for SD,SMZ,HCB,malathion,and BPA.Under the experimental conditions,the HCB,malathi-on,and BPA in the effluent are better than the indicators specified in the Sanitary Standards for Drinking Water(GB 5749-2022),and the sulfamethoxazole and sulfamethoxazole in the effluent are better than the water quality indicators required by developed countries in Europe and America.
Water supply treatmentEmerging pollutantpretreatmentConventional processOzone-activated carbonOptimization
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维普
