The Study Of MEUF In Purification Of Water

Membrane technology is a high and new technology in recent years, it is one of the key technologies of improving and insuring the continuous development of society. It has important effect in energy resource, electron, chemistry, medicine, foodstuff, automobile, environment protection and so on. With the development of membrane technology, the application of membrane spread widely in water treatment. At the same time, the effectiveness of membrane separation improved the popularity and application in drinking water advanced treatment.Micelle-enhanced ultrafitration(MEUF) is a brand-new water treatment of membrane technology, its research started the 60th of last century. This technology combined the surfactant with the ultrafitration membrane, it is suitable for remove the minim metal ion and the organic contaminate which molecular weight less than 300, it is a high efficiency and practicality water treatment for low-grade polluted water.This paper carried out the effect of operation time, filtration pressure, the concentration of the surfactant and other ion existed on the efficiency of Mn²⁺ and the membrane pollution during these process, which used sodium dodecyl sulface(SDS) and sodium dodecyl benzene sulfonate(SDBS) for the test. The test ultimately work out the optimal operation condition and put forward the reasonable washing method.The results show that: operation time, filtration pressure has no effect on the removal efficiency of Mn²⁺, but has important influence in the flux of the ultrafitration; the concentration of the surfactant has the effect on the removal efficiency of Mn²⁺, the flux of the ultrafitration and the quantity of the surfactant of the effluent; the ion existed in the wastewater also has effect on the removal efficiency of Mn²⁺. When the concentration of the SDBS rise up from 1.2mg/L to 3.6mg/L, the removal efficiency of Mn²⁺ improved from 68.84% to 92.26%, while the removal efficiency of Mn²⁺ using SDS has improved by 13.89%. the test that using hydrodynamic-washing and the chemistry-washing to clean the polluted ultrafitration membrane show that: the recovery of the membrane flux of SDBS is just to 60%-70%, the washing effect of NaClO is superior to NaOH.