Algae blooming in water sources breaks out increasingly and seriously threatened the water supply safety.Bench scale tests were conducted to study the effects of ·OH generated from strong ionization discharge and high pressure water jet cavitation on cell density,cell integrity and photosynthetic capacity of 3kinds of typical freshwater algae.Algae species including Microcystisaeruginosa,Synedra sp.,and Scenedesmusquadricuauda were respectively prepared at concentrations of 19.5×104,21.8×104 and 4.90×104 cells/mL,and the cell integrity was assessed by flow cytometry.Results suggested that the ·OH lethal threshold of the algae was 1.07mg/L within the exposure time of 4.5s.The cell morphological observation results showed that all the cells were integral and no cytoplasm composition spilled.Hence,large-scale production of ·OH is a novel method to inactive typical algae species efficiently and to protect drinking water safety simultaneously.
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