With the acceleration of urbanization and the improvement of people's living standards, more chemicals that humans rely on are entering the city and surrounding water bodies. Anionic surfactants are one of the essential products for human beings. It is also one of the inducements that cause the eutrophication. The algae-laden water caused by eutrophication is a headache in the traditional water treatment process. To solve the problem, ultrafitration combined process was widely investigated to treat the algae-laden water. The presence of stimuli, low concentration anionic surfactant, probably interfere the performance of ultrafiltration process during algae-laden water treatment. In this study, the influence of two typical anionic surfactants, sodium dodecyl sulfate (SDS) and sodium dodecyl benzene sulfonate (LAS), on the performance of coagulation-enhanced ultrafiltration was investigated. The aluminum sulfate hydrate and iron sulfate hydrate were respectively employed as coagulant. Based on the residual turbidity and zeta potential, 4 mg/L Al and 8 mg/L Fe were determined as the optimal coagulant dosage. The floc morphology confirmed that Al-algae flocs with lower fractal dimension (D_f) were looser and more porous compared to Fe-algae flocs. More coagulant was depleted by LAS due to the better hydrophobicity of LAS. During the filtration process, LAS caused a larger flux reduction compared with SDS regardless of the coagulant that was used. More organic compounds penetrate into membrane pores and block the pores with the presence of LAS since algal cell aggregation was weakened. Finally, the rejection of organic compounds by the coagulation-enhanced ultrafiltration process was studied, and the co-existing surfactants can cause effluent deterioration. Therefore, the presence of surfactants has a negative effect to the ultrafiltration treatment of algae-laden water.

随着城市化进程的加快和人们生活水平的提高，越来越多人类赖以生存的化学物质正在进入城市及周边水体。阴离子表面活性剂是人类必不可少的产品之一。也是造成富营养化的诱因之一。富营养化导致的藻类水是传统水处理过程中的一个令人头疼的问题。为解决这一问题，人们广泛研究了超滤联合工艺处理含藻水。刺激物、低浓度阴离子表面活性剂的存在可能会干扰藻类水处理过程中超滤过程的性能。在这项研究中，两种典型的阴离子表面活性剂十二烷基硫酸钠（SDS）和十二烷基苯磺酸钠（LAS）的影响，研究了混凝增强超滤的性能。水合硫酸铝和水合硫酸铁分别用作混凝剂。根据残留浊度和 zeta 电位，确定 4 mg/L Al 和 8 mg/L Fe 为最佳混凝剂用量。絮体形态证实，藻类絮体具有较低的分形维数（D_f ) 与铁藻絮凝物相比更松散且多孔。由于 LAS 更好的疏水性，更多的凝结剂被 LAS 耗尽。在过滤过程中，无论使用何种混凝剂，与 SDS 相比，LAS 都会导致更大的通量减少。由于藻细胞聚集减弱，更多的有机化合物渗透到膜孔中并在 LAS 的存在下堵塞孔。最后，研究了混凝增强超滤工艺对有机物的截留作用，共存表面活性剂会导致出水变质。因此，表面活性剂的存在对藻类水的超滤处理具有负面影响。