Abstract Key issues for membrane technology in harvesting microalgae are to reach high fluxes and to alleviate fouling by microalgal cells and extracellular organic matter. To achieve this goal, negatively charged patterned membranes were prepared from polysulfone/sulfonated polysulfone (PSf/sPSf) blends using a spray-modified phase inversion method, and the effect of sPSf on the membrane morphology and filtration performance was investigated. The patterned membrane with highest sPSf concentration exhibited the highest clean water permeance (2420 ± 260 L/m2 h bar), lowest membrane intrinsic resistance (6.1 m-1) and highest critical flux (55 L/m2 h) for harvesting microalgae. Membrane vibration could mitigate membrane fouling both for the patterned and flat membranes. The vibration system can easily achieve turbulent flow at frequencies higher than 7 Hz. The synergy between membrane vibration, surface pattern and charge thus resulted in a clearly enhanced membrane performance.

中文翻译：

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使用振动的、带负电荷的、图案化的聚砜膜收获微藻

摘要 膜技术收获微藻的关键问题是达到高通量并减轻微藻细胞和细胞外有机物的污染。为了实现这一目标，使用喷雾改性转相法从聚砜/磺化聚砜 (PSf/sPSf) 混合物制备带负电荷的图案化膜，并研究了 sPSf 对膜形态和过滤性能的影响。具有最高 sPSf 浓度的图案化膜表现出最高的清洁水渗透率 (2420 ± 260 L/m2 h bar)、最低的膜固有电阻 (6.1 m-1) 和最高的微藻收获临界通量 (55 L/m2 h)。膜振动可以减轻图案化膜和平面膜的膜污染。振动系统可以轻松实现频率高于 7 Hz 的湍流。因此，膜振动、表面图案和电荷之间的协同作用导致膜性能明显增强。