In this study, ultrafiltration (UF) pre-oxidation with a boron-doped diamond (BDD) electrode was employed aiming to mitigate membrane fouling during algae-laden water treatment. It was found that BDD anodizing can efficiently alleviate membrane fouling regardless of the filtration membrane material when the oxidation time was over 30 min. This was because that the cake layer fouling resistance was highly mitigated by the pre-oxidation process. The generated small molecular organics after anodic oxidation might increase the potential of pore blockage. The anodizing preferentially oxidized hydrophobic organic and fluorescent substances, which is conducive to reducing membrane fouling and improving production efficiency. Besides, disinfection byproduct precursors and harmful algae derived substances of UF filtrated solution were contained. The algae bodies tend to agglomeration and the zeta potential obviously declined after the pretreatment, which is instrumental in forming a loose cake layer structure. In addition, the interaction force between membrane and foulants also converted to a repulsion force after pre-oxidation, which implies that BDD pre-oxidation was an effective way to mitigate cake layer fouling by reducing foulant-membrane interactions. At last, the secondary organic release of a dynamic formed cake layer was proved to be limited especially for living algae cells.

在这项研究中，采用硼掺杂金刚石（BDD）电极进行超滤（UF）预氧化，目的是减轻藻类载水处理过程中的膜污染。发现当氧化时间超过30分钟时，不管过滤膜材料如何，BDD阳极氧化都可以有效地减轻膜污染。这是因为通过预氧化过程大大降低了滤饼层的耐污垢性。阳极氧化后生成的小分子有机物可能会增加孔堵塞的可能性。阳极氧化优先氧化疏水的有机和荧光物质，这有利于减少膜污染并提高生产效率。此外，还含有UF过滤溶液的消毒副产物前体和有害藻类衍生物质。预处理后，藻体趋于团聚，ζ电势明显下降，这有助于形成松散的蛋糕层结构。另外，膜与污垢之间的相互作用力在预氧化后也转化为排斥力，这表明BDD预氧化是通过减少污垢-膜相互作用来减轻滤饼层结垢的有效方法。最后，动态形成的滤饼层的二次有机释放被证明是受限制的，特别是对于活藻细胞。这表明BDD预氧化是通过减少污垢-膜相互作用来减轻滤饼层结垢的有效方法。最后，动态形成的滤饼层的二次有机释放被证明是受限制的，特别是对于活藻细胞。这表明BDD预氧化是通过减少污垢-膜相互作用来减轻滤饼层结垢的有效方法。最后，动态形成的滤饼层的二次有机释放被证明是受限制的，特别是对于活藻细胞。