Ozone treatment of seawater to control vibriosis in mariculture of penaeid shrimp,penaeus vannameii

摘要

During experiments from April 1990 to May 1991 ozone gas was reacted with seawater to reduce isease causing Vibrio bacteria at a shripmp hatechery,LARFICO,located near Ayangue,Ecuaddor.A 1,540 liter capacity fiberglass contact tower haivn ga five to seven minute retentin time treated pacific Ocean seawater for an ozone produced oxidant resiual average of 0.07 mg/liter.Form February 1991 to May 1991,ozonized seawater was used in experimental larval tanks of 13,000 liter capacity while similar tanks acted as contorls.Sonce zone eliminated Vibrio as determined by TCBS plating of treated water while contorl water showed Vibrio colonies too numerous to count which caused shrimp to die of disease,te entire hatchery (30 tanks of 13,000 liters each) was treated with ozonized seawater from June 1991 to September 1992.