摘要
采用减压膜蒸馏过程,实验研究了0.22μm的疏水性聚四氟乙烯(PTFE)微孔膜处理偶氮染料废水的可行性.实验研究了进料温度、进料浓度、进料流速、冷侧压力对膜通量及截留率的影响.实验结果表明,在所研究的工艺条件范围内,进料温度、进料流速的提高和进料浓度、冷侧压力的降低有利于膜通量增大;进料温度的提高和进料浓度、进料流速、冷侧压力的降低使截留率增大.降低膜面的水蒸气汽化的表观活化能是提高膜通量的重要措施.
The effects of some factors, such as temperature, concentration and flow rate of the feed as well as pressure of the cold side, on membrane flux and rejection were studied in the separation of Azo dye wastewater by the vacuum membrane distillation （VMD） process using hydrophobic PTFE microfiltration membrane with pore size of 0.22 tan. It is shown that the membrane flux and the rejection of methyl orange increase with the increasing of feed temperature and feed flow rate as well as the decreasing of feed concentration and cold side pressure. To reduse the apparent active energy of vapor on the membrane is also an effective way to enhance membrane flux.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2007年第1期79-81,共3页
Membrane Science and Technology
基金
重庆市自然科学基金(2005BB7261)
重庆大学应用基础研究资助项目(2003028)
关键词
减压膜蒸馏
甲基橙水溶液
PTFE微孔膜
vacuum membrane distillation （VMD）
methyl orange aqueous solution
PTFE micro- porous membrane
