The objective of this study is to analyze the relation between flocs shape and the permeation flux stability in a pilot-scale Coagulation/Flocculation-Microfiltration hybrid process for humic acids removal from water under different coagulant dose and pH values. Besides, the treatment performance was examined. The results showed that at pH 7.1 and polychloride of aluminum coagulant of 10⁻¹ mmol Al.L⁻¹, coagulation/flocculation was effective in maintaining membrane permeability flux. Also, UV₂₅₄, TOC, and turbidity removal efficiencies were almost ≥ 90%. In addition, this condition proved a potent effect on residual aluminum control and specific energy consumption, where they were, respectively, 0.0852 kWh.m⁻³ and 20 µg.L⁻¹. Furthermore, humic acids fouling using four Hermia mechanisms (individual and combined) was modeled. Complete pores blocking and cake filtration appeared to be the major mechanisms of microfiltration membrane fouling. Finally, this hybrid process was compared with the most used technologies for the humic acids removal from water. It was concluded that the former process is more reliable, efficient, and cost-effective.

本研究的目的是分析在不同混凝剂剂量和 pH 值下从水中去除腐殖酸的中试规模混凝/絮凝-微滤混合工艺中絮凝物形状与渗透通量稳定性之间的关系。此外，检查处理性能。结果表明，在pH 7.1和10 ^-1  mmol Al.L ^-1的多氯化铝混凝剂下，混凝/絮凝在维持膜渗透通量方面是有效的。此外，UV ₂₅₄、TOC 和浊度去除效率几乎 ≥ 90%。此外，这种情况证明了对残留铝控制和比能耗的有效影响，它们分别为 0.0852 kWh.m ^-3和 20 µg.L^-1。此外，使用四种 Hermia 机制（单独和组合）对腐殖酸污染进行了建模。完全堵塞孔和滤饼似乎是微滤膜污染的主要机制。最后，将这种混合工艺与最常用的从水中去除腐殖酸的技术进行了比较。得出的结论是，前一种工艺更可靠、更高效、更经济。