ESEARCH OF MBR FIVE-PORE HOLLOW FIBER MEMBRANE FOULING UNDER DIFFERENT HYDRAULIC CONDITIONS

During simulated dyeing and printing wastewater treatment，the characteristics of MBＲ five-pore hollow fiber membrane fouling in terms of hydraulics were studied． In order to test the changes of TMP，which was a key characteristic on membrane fouling，the experiment was carried out under the aeration intensity condition ranging from 25 L/h to 100 L/h and water flux condition ranging from 9 L/( m2·h) to 18 L/( m2·h) ． The results indicated that when the water flux was stable，the increasing of aeration intensity in a certain range could mitigate membrane fouling effectively and prolong the membrane running time; when aeration intensity was stable under sub-critical flux，the TMP's growth rate gradually reduced along with decreasing of water flux，namely the membrane running time was prolonged． This study provided valuable data of the membrane fouling control as well as the optimization of hydraulic conditions．