Key Laboratory of Applied Marine Biotechnology of Ministry of Education, College of Life Science and Biotechnology, Ningbo University, Ningbo 315211, China
Microcystis aeruginosa is the common harmful Cyanobacteria species causing serious environmental conditions of lakes and reservoirs.Effects of low intensity ultrasonic on cell restraint of this microalgal species under algae growth phase,cell concentration,water pH,water temperature and re-ultrasonic conditions were investigated in the laboratory.The results showed that cell concentration and pH had no notable influence on the ultrasonic inhibition,but algae growth phase,water temperature and ultrasonic times had notable influence on ultrasonic inhibition.The inhibition effect was more obvious at 15℃,20℃ and 25℃ as compared to 30℃ and 35℃,and 40℃ was bad for the algal growth even without ultrasonic.The inhibition effects in lag phase,stationary phase and senescence phase were stronger than in logarithmic phase.The re-ultrasonic could effectively prolong the time of remainder algal recovery and stabilize the algae inhibition effect.
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