Reseach on the membrane fouling characters changing of humic acid during the photo-catalysis degradation process

The membrane fouling characters changing of humic acid (HA)and the mixture of HA and TiO2 during the photocatalysis degradation process were studied. The process is illustrated by the dead-end filtration method using the pressure reservoirs. The experiment results indicate that the membrane fouling of HA is alleviating during the photocatalysis process. Although the removal rate of TOC is 70% after 60 mins photocatalysis process,the membrane fouling phenomenon vanishes,which indicates that the degradation intermediate cannot lead to membrane fouling. The mixture cannot lead to membrane fouling after 60 mins photocatalysis process,which illustrates that the surfaces of the TiO2 particles have been recovered. Therefore,the HA after photocatalysis degradation process can alleviate the membrane fouling level.