Study on Vacuum Membrane Distillation of PP Hollow Fiber Membranes Used in Concentrated Seawater from Low-Pressure Reverse Osmosis
Concentrated seawater from low-pressure reverse osmosis (RO) was treated by membrane distillation technology (MD) . Hydrophobic PP hollow fiber was fabricated by the melt-spinning method. The microstructure of the PP hollow fiber membrane was observed. The effects of NaCl concentration, flow rate and temperature on water flux and rejection rate were studied. The results showed that water flux and salt rejection rate changed a little with increasing initial concentration of NaCl solution. Water flux increased greatly with the increase of feed temperature, vacuum pressure and solution flow rate. The SEM result indicated that the slit-like micropore size well formed with the maximal pore size 0.05μm wide while 0.3um long. In this work, the maximal water flux reached 7.8 L/m2h, and the rejection ratio of NaCl was above 99.9％.
membrane distillation polypropylene hollow fiber distillation.
Feifei Shao Lei Ni Yufeng Zhang Yingbo chen Zhen Liu Zhen Cao
State Key Laboratory of Hollow Fiber Membrane Materials and Processes (Tianjin Polytechnic University), Tianjin, 300387, China
国内会议
青岛
英文
309-315
2012-06-26（万方平台首次上网日期，不代表论文的发表时间）