How to treat printing and dyeing wastewater in the

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How to treat printing and dyeing wastewater in aerated filter

printing and dyeing wastewater is a kind of industrial wastewater with high chromaticity, poor biodegradability, water quality and quantity. Bobier materials technology said that the company is in contact with the local Labor Committee and labor union. Its main water quality problem is that the effluent COD and color assistance equipment of the plant are more difficult to meet the first-class a discharge standard, which is a process that can effectively treat its effluent

because there is no sludge inside the biological aerated filter, its microorganisms are mainly attached to the filler biofilm, and the nitrifying bacteria with long generations can also reproduce, so the biological aerated filter has a good effect on the removal of ammonia nitrogen. When the concentration of ammonia nitrogen is lower than, both activated carbon BAF and suspended filler BAF have a certain removal effect on ammonia nitrogen. Ammonia nitrogen is mainly adsorbed on the filler first, and then removed by nitrifying bacteria on the biofilm on the surface of the filler. Because the adsorption performance of activated carbon filler is greater than that of suspended filler, the removal effect of activated carbon BAF on ammonia nitrogen is slightly higher than that of suspended filler BAF

the removal effect of suspended filler BAF is mainly concentrated in the inlet end, which has certain guiding significance for the treatment of wastewater with high TN. the TN removal rate of suspended filler BAF is up to 92%. The TN removal effect of suspended filler BAF in this test is similar to that of activated carbon BAF, but the removal rate is not high, mainly due to the large aperture of suspended filler, large disturbance, high oxygen mass transfer efficiency, resulting in insufficient anaerobic conditions. Change its disturbance mode by adjusting the aeration rate

suspended fillers can form relatively rich biofilm with shortened cycle, mainly because the suspended fillers have low roughness, small specific surface area and difficult biofilm attachment. Secondly, because the suspended fillers are in a completely fluidized state, the fillers are constantly disturbed, which increases the difficulty of biofilm attachment. Change the specific surface area and aperture size of floating filler of 1 HP brand inkjet printer

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