Effect of support material pore size on the filtration behavior of dynamic membrane bioreactor
Effect of support material pore size on the filtration behavior of dynamic membrane bioreactor
复制标题
支撑材料孔径对动态膜生物反应器过滤行为的影响
DOI：
10.1016/j.biortech.2018.02.007
复制
发表时间：
2018-05-01
影响因子：
11.4
通讯作者：
Meng, Fangang
中科院分区：
文献类型：
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作者：
Cai, Donglong;Huang, Ju;Meng, Fangang
研究了动态膜生物反应器（DMBR）中载体材料孔径对启动和稳定阶段过滤行为的影响。在动态膜（DM）形成之前，50 μ m处的浊度可大于250 NTU，而25 μ m和10 μ m处的浊度分别小于40和10 NTU。DM形成后，在低膜压<0.6kPa的条件下，稳定阶段持续61 d，5、10和25 μ m过滤器的出水浊度（< 1 NTU）和化学需氧量相近。然而，它们的平均通量分别为66.4、25.1和3.5 L中心点m（-2）中心点h（-1），表明25 μ m过滤器具有显著较低的过滤阻力。因此，为了避免在启动期间或膜清洗后出现不允许的高流出物浊度，并通过低压过滤实现高通量，类似于25 μ m的筛孔尺寸更适合于DMBR。
The effect of support material pore size on the filtration behaviors during start-up and stabilized stages in the dynamic membrane bioreactors (DMBR) was studied. Before the dynamic membrane (DM) was formed, the turbidity at 50-mu m could be more than 250 NTU, while it was less than 40 and 10 NTU at 25- and 10-mu m, respectively. After the DM was formed, the stabilized stage lasted for 61 days with low transmembrane pressure < 0.6 kPa and the 5-, 10-, and 25-mu m filters had similar effluent turbidity (< 1 NTU) and chemical oxygen demand. However, their averaged flux was 66.4, 25.1, and 3.5 L center dot m(-2)center dot h(-1), respectively, suggesting that the 25-mu m filter had significantly lower filtration resistance. Consequently, to avoid unallowable high effluent turbidity during start-up or after membrane cleaning and to achieve high flux with low pressure filtration, a mesh size of similar to 25 mu m is more suitable for DMBR.