오존처리법에 의한 양어용수 살균에 대하여 I. 해산어류 병원세균의 오존 감수성

Disinfection of Culture Water Supply by Ozonization I. Susceptibility of Some Fish-Pathogenic Bacteria Isolated From Cultured Marine Fish

해수중 잔류옥시던트(TRO) 농도를 0.1, 0.3 및 0.5 mg/liter로 조정하고 시간 경과에 따른 농도의 안정성을 관찰한 결과 0.1 mg/liter의 경우 측정 20분까지는 변화를 보이지 않았고, 0.3 및 0.5 mg/liter 에서는 1시간 경과시까지 안정하였다. 해수를 오존처리하여 해수중에 생성되는 TRO를 이용하여 해산어류 병원세균인 Edwardsiella tarda, Vibrio sp., Streptococcus sp., Staphylococcus sp.에 대한 살균효과를 실험한 결과 0.1 mg/liter에서 3분간의 처리로 99.9% 이상, 0.3~0.5 mg/liter에서는 30초에서 1분간의 반응시간으로 99.99% 이상이 살균되어졌다.

The disinfectant effects of total residual oxidants (TROs) produced by ozonization of natural sea water were investigated against fish pathogenic bacteria isolated from flounder and red seabream. The concentration of 0.1 mg TROs/liter was stable for 20 min in filtered natural seawater, and those of 0.3 and 0.5 mg TROs/liter were also stable for more 1 hr. Disinfectant effects of TRO against Edwardsiella tarda, Vibrio sp., Streptococcus sp. and Staphylococcus sp. were observed with a concentration of 0.1 mg/liter for 180 sec, and the treatment killed more than 99.9% of bacterial cells. With TROs of 0.3 to 0.5 mg/ liter, the viable cells of the bacteria were reduced by more than 99.99% in 60 sec.