Abstract
The effects of transmembrane pressure on the performance of treatment of wastewater containing humic acid using dynamic membrane were studied, in which the relative permeate fluxes, pollutant removal efficiency and membrane fouling characteristics were investigated. The results indicated that the removal rates of pollutant UV254 and UV436 all gradually reduced with running time, in which the initial removal rates of pollutant UV254 and UV436 all exceed 90% and 97%, respectively. In steady states, UV254 removal rates from high to low were 0.11Mpa, 0.06Mpa, 0.25Mpa and 0.16Mpa. The resistance of fouling dynamic layer took up most of the total membrane resistance. The fouling degree of the dynamic membrane layer was much more serious than that of the support. The resistances of the fouling dynamic layer and total fouling membrane both increased with the rise of transmembrane pressure. The pore blockage rates of support increased from 0.06Mpa to 0.16Mpa, and then reduced as the transmembrane pressure increased to 0.25Mpa.
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