The increasing frequency and intensity of taste- and odour-producing cyanobacteria in water sources is a growing global issue. Odour events caused by 2-methylisoborneol (2-MIB) mainly arising from filamentous cyanobacteria have been a very common problem in water supply. Removal rates of filamentous cyanobacteria and 2-MIB by conventional water treatment, such as coagulation, and disinfection treatment processes is low. Hence, a moderate pre-ozonation of cyanobacteria (with little cell damage) was proposed in this study as an enhanced coagulation step to remove filamentous cyanobacteria and intracellular 2-MIB effectively, while avoiding the release of intracellular 2-MIB. A post-peroxone (O₃/H₂O₂) process was applied after sand filtration to degrade the residual dissolved 2-MIB. Results show that moderate pre-ozonation (0.2 mg/L O₃ oxidation for 20 min) can substantially enhance the coagulation efficiency for algae, with low cell lysis and high cell viability. Furthermore, 2.0 mg/L O₃ combined with 2.0 mg/L H₂O₂ can degrade the residual dissolved 2-MIB nearly 100% after 20 min reaction. Based on the optimal dosages, a 0.6 m³/h pilot system, including pre-ozonation, coagulation and sedimentation, sand filtration, and post-peroxone processes, was continuously run for 14 days, and it was found that the proposed process can effectively and stably remove filamentous cyanobacteria and 2-MIB.

水源中产生味道和气味的蓝藻的频率和强度越来越高，这是一个日益严重的全球性问题。由主要由丝状蓝藻引起的 2-甲基异冰片 (2-MIB) 引起的气味事件一直是供水中非常普遍的问题。传统水处理如混凝和消毒处理工艺对丝状蓝藻和 2-MIB 的去除率较低。因此，本研究提出了对蓝藻进行适度的预臭氧化（几乎没有细胞损伤）作为增强的凝血步骤，以有效去除丝状蓝藻和细胞内 2-MIB，同时避免细胞内 2-MIB 的释放。A 后过氧化物 (O ₃ /H ₂ O ₂) 工艺在砂滤后应用以降解残留的溶解 2-MIB。结果表明，适度的预臭氧化（0.2  mg/LO ₃氧化 20 分钟）可以显着提高藻类的凝结效率，具有低细胞裂解和高细胞活力。此外，2.0  mg/LO ₃与2.0  mg/LH ₂ O ₂ 结合可以在反应20分钟后将残余溶解的2-MIB降解近100% 。基于最佳剂量，0.6 m ³/h中试系统，包括预臭氧化、混凝沉淀、砂滤和后过氧酮工艺，连续运行14天，发现所提出的工艺可以有效稳定地去除丝状蓝藻和2-MIB。