EXPERIMENT ON SCREENING OF SUITABLE FILLER FOR DYEING WASTEWATER ADVANCED TREATMENT

The paper used IABF for advanced treatment of printing and dyeing wastewater，to optimize the suitable stuffing and study the water treatment technological process． The results demonstrated that activated carbon and volcano rock mixed stuffing played synergistic effect，providing a good carrier for building and loading with different efficient microbial flora． When the mixed stuffing's particles diameter was 3 ～ 5 mm，gas /water ratio was 4 ∶ 1，HRT was 10 h，operation cycle was 3 h，and aeration /interruption ratio of 3∶ 1，the average removal rates of COD，chromaticity color，NH3 －N，TN could reach 63. 2%、 70. 4%、86. 2%、55. 3%，respectively． By using mixed stuffing IABF，the COD，chromaticity color and TN removal rate could be improved 9. 8%、12. 8%、39. 9%，respectively，as compared with the conventional ceramic stuffing BAF． The study provided a new method for advanced treatment for printing and dyeing wastewater