Study on non-chemical control of water bloom in eutrophic lakes with ozone application

日本夏季湖泊中经常发生水华，水华由蓝藻、蓝藻和湖沼浮游生物组成。这些光生浮游生物在充足的日照、足够的温度和湖泊富营养化等条件下大量繁殖，水华现象对湖泊水质和环境造成一定的危害，如水体污染、水体异味等。为了抑制或消灭低水平的蓝藻种群，我们尝试了臭氧鼓泡通过水中的浮游生物。臭氧的强氧化作用使蓝藻细胞表面膜破裂。臭氧鼓泡后半小时内，蓝藻数量减少了一半.

Water blooms which consist of blue-green algae, Cyanobacteria of limnoplankton are often observed in lakes in summer season in Japan. Those photo plankton have big propagation under the condition of plenty of insolation, enough temperature, eutrophication in lakes and so on. The phenomenon of water bloom gives some damage to water quality and environment in the lake like as water polution and smelling water. To suppress or exterminate Cyanobacteria population in low level, we tried to applicate ozone bubbling through water within limnoplankton. Cyanobacteria cell surface membrane was broken down by strong oxidative effect of ozone. The Cyanobacteria decreased harf in population in a harf hour after ozone bubbling.