METHOD FOR PRODUCING FISH LARVAE IN CLOSED WATER SUPPLY SYSTEM Russian patent published in 1997 - IPC

FIELD: fishery, in particular, commercial carp production. SUBSTANCE: method involves disinfecting incubators; disintegrating larvae; providing incubation and holding larvae in ozonized water, which is preliminarily cleaned from organo-mineral contaminants, deodorized and saturated with oxygen in reactor. Ozone is supplied at pressure of 1.2-1.6 atm, flow rate of 1.25-50 l/min (depending on type and number of incubators) to reach ozone concentration in air-ozone mixture 8 mg/l. Air-ozone mixture and water contact time is 5 min. Method allows survival rate to reach 92-96%. Water consumption for producing 1 million larvae for incubation and holding period of 2 days is 1.-2.5 cub m. EFFECT: increased efficiency, reduced water consumption and decreased production cost. 1 tbl