METHOD FOR CONTROLLING AND REGULATING CONCENTRATION OF SUBSTANCE IN FLOW-THROUGH MEDIUM WITH HYDROBIONTS Russian patent published in 2006 - IPC A01K61/00 

FIELD: fishery, in particular, method which may be used in curative and prophylactic processing of hydrobionts.

SUBSTANCE: method involves feeding substance under control into aqueous medium until maximum allowable concentration at given exposure is reached; providing reduction of concentration of said substance in said medium; initially setting mass ratio of substance introduced into medium and mass accumulated in medium, with ratio being coordinated with exposure and water-exchange of medium; feeding substance under control at predetermined flow velocity directly into flow-through reservoir without cutting off water supplying process; determining substance concentration on the basis of dependence: F=Mo/Mτ x Q/V x τ, where F is dimensionless concentration criterion; Mo is mass of substance introduced into medium; Mτ is mass of substance accumulated in medium; Q is flow velocity of flow-through water in substance; V is volume of medium; τ is exposure, with Mo=gt, where g is flow velocity of substance per unit of time; Mτ=Wτ x V, where Wτ is maximal concentration of substance in medium at exposure τ.

EFFECT: useful utilization of fungicide and increased efficiency in treatment procedure.

1 dwg, 1 ex