School of Environment, Guangdong Engineering Research Center of Water Treatment Processes and Materials, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China.
School of Environment, Guangdong Engineering Research Center of Water Treatment Processes and Materials, and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-Sen University), Guangzhou 510275, China.
Bioresour Technol. 2018 May;255:359-363. doi: 10.1016/j.biortech.2018.02.007. Epub 2018 Feb 6.
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-μm could be more than 250 NTU, while it was less than 40 and 10 NTU at 25- and 10-μm, 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-μm filters had similar effluent turbidity (<1 NTU) and chemical oxygen demand. However, their averaged flux was 66.4, 25.1, and 3.5 L·m·h, respectively, suggesting that the 25-μm 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 ∼25 μm is more suitable for DMBR.
研究了支撑材料孔径对动态膜生物反应器（DMBR）启动和稳定阶段过滤行为的影响。在形成动态膜之前，50μm 的浊度可以超过 250NTU，而在 25μm 和 10μm 时，浊度分别小于 40 和 10NTU。形成动态膜后，跨膜压力<0.6kPa 的稳定阶段持续了 61 天，5μm、10μm 和 25μm 的过滤器具有相似的出水浊度(<1NTU)和化学需氧量。然而，它们的平均通量分别为 66.4、25.1 和 3.5L·m·h，表明 25μm 过滤器的过滤阻力明显较低。因此，为了避免在启动阶段或膜清洗后出现不可接受的高出水浊度，并实现低压过滤下的高通量，网孔尺寸约为 25μm 更适合 DMBR。
