Research On The O₃/Photocatalytic Oxidation-biological Activated Carbon Technology Advanced Treatment Of Simulated Printing And Dying Wastewater

. This paper studied the ozone-biological activated carbon combined processand photocatalytic oxidation-BAC advanced treatment of dyeing wastewater effect,and PCR-DGGE technique was used to study colony structure of activated carbonwhen photocatalytic oxidation-BAC process ran normally.The bacterias used in this test were bioengineering bacteria which had goodperformance in the degradation of reactive brilliant red X-3B. In this test, thebacterias were expand cultured to biofilm on activated carbon for advanced treatmentof printing and dyeing wastewater.Ozone-biological activated carbon treatment process was used to treat simulationof reactive brilliant red X-3B wastewater, when ozone dosage was30mg/L, ozonetreatment time2hours, the BAC HRT3hours, the average CODCrof water was20.83mg/L, the average TOC of water is12.3mg/L, the average chromaticity ofwater is11.9degrees, the average UV254of water is0.1715. For CODCr, TOC,chromaticity, and the average removal rate in the order was90.7%,73.36%,97.3%,63.3%, and feel better effect effluent treatment, can be used as reuse water of adyeing factory in Shandong.The Promise UV Oxidation-BAC combined process to the depth of dyeingwastewater treatment, ozone dosage of11mg/L, photocatalytic oxidation time was2h, mean CODCrof the water was11.21mg/L, mean chromaticity of the water was9.7degrees. For CODCr, chroma，the average removal rate were91.47%,97.8%,and the process for the removal of organic matter and chroma can well meet the reusewater standard of a dyeing factory in Shandong.In addition, DNA was extracted from the microorganisms in bioreactor, carried outPCR amplification, followed by denaturing gradient gel electrophoresis (abbreviationfor DGGE) analysis. The results display degrading bacteria S1added to the BACdevice under various experimental conditions were dominant, and measured filmrecycling sequencing degrading bacteria were Rhodocyclus sp. genus.The results showed that the BAC which mainly with engineered bacteria had well treatment effect on simulated dye wastewater treatment.The bacteriawas well tolerated, has great value in printing and dyeing wastewater treatment and was worthy of further study and application.