摘要
采用太湖原水直接超滤,确定其临界通量与可持续通量的数值.通过分析在临界通量和可持续通量下超滤膜的跨膜压差、出水水质以及在极端条件下系统的运行状况,考察临界通量与可持续通量的可行性.试验结果表明,超滤膜的临界通量为27～30L/（m2·h）,可持续通量最大值为45L/（m2·h）;在相近的原水条件下,临界通量与可持续通量的起始运行压力均为8kPa左右、出水水质基本相同,但在一个反洗周期内可持续通量跨膜压差的增长值较临界通量的大2.3kPa,在低温、雨后高浊度两种原水条件下,可持续通量的跨膜压差的增长幅度较高,增幅稳定在91%左右,但经反洗后基本可恢复过滤前的状态.
The critical flux and sustainable flux of Taihu water through the using of raw water for ultrafiltration directly were confirmed.The analysis of ultra-filtration membrane′s trans-membrane pressure,effluent quality in critical flux and sustainable flux and system performance under extreme condition may prove that critical flux and sustainable flux are feasible.The result shows that numerical value of ultrafiltration membrane′s critical flux ranges from 27 to 30L/（m2·h）,while sustainable flux′s maximum value is 45L/（m2·h）.When raw water′s condition are similar to each other,the starting operation pressure of critical flux and sustainable flux are both around 8kPa and their effluent quality are basically the same.However,within a backwashing cycle,the transmembrane pressure values of sustainable flux grow faster than that of critical flux around 2.3kPa;transmembrane pressure of sustainable flux has a great increasing range which stabilizes in around 91% when the raw water′s turbidity are high after rain or low temperature.But the membrane′s state may recover to normal basically after backwashing.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2016年第3期109-114,共6页
Membrane Science and Technology
基金
国家"十二五"重大水专项"太湖流域饮用水安全保障计划"项目(2012ZX07403-001-003)
国家自然科学基金项目(51109153)
江苏省住建厅科技项目(2014ZD96)阶段性成果
关键词
超滤膜
临界通量
可持续通量
跨膜压差
ultrafiltration membrane
critical flux
sustainable flux
transmembrane pressure difference
