L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

L'air Liquide, Societe Anonyme a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Chemoxal, S.a.

Pascal Crisinel

Lucie Prost

Jean Mallard De La Varende

Henry Ledon

Daniel Le Rouzic

Remy Nicolle

Lionel Bon

Sylvie Le Royer

Gerard DeClerck

The invention relates to a method for improving conditions in closed circuit seafood and fish farming, comprising the following steps: a) at least part of the water from at least one of the rearing ponds ( ) is recycled, whereby said water is treated one or more times and purified ( ) before it is re-injected into said pond; b) the water recycled during the recycling path indicated in step a) is mixed with a new supply of water ( ); c) all or part of the recycled water ( ) undergoes ozonization and, wherever applicable, the new supply of water ( ) also undergoes ozonization either partially or in full before it is mixed with the re-circulated water.

Method for improving conditions in closed circuit fish farming

Process and plant for the treatment of an article with ozonized water

The treatment of a food product is carried out using ozonized water in at least two containers, each container possibly being associated with a set value of the dissolved-ozone content that it is desirable to maintain therein, by ozonizing a stream of water so as to obtain a dissolved-ozone content of the stream of ozonized water greater than or equal to the highest of the set values of the dissolved-ozone content which are associated with each of said containers, and the dissolved-ozone content in each of the solution containers is analyzed in order to compare the result of each of the analyses with the associated set value and to carry out a feedback operation, where appropriate, depending on the result of each comparison, on the control of the flow of ozonized water injected into the container in question, so as to reestablish the dissolved-ozone content of this solution container at its associated set value.

Process and plant for the controlled washing of food products with ozonized water

A process for decolorizing, sanitizing and deodorizing a food product with ozone. The food product and water are mixed to form an initial solution and supplied to a pumping device to pressurize the solution. An ozone containing gas is injected into the initial solution in order to allow the treatment of the food product, without the occurrence of liquid/gas demixing. The apparatus includes a pumping device for pressurizing the solution, a contactor into which the pressurized solution is fed, a source of ozone, and at least one injector for injecting ozone into the solution.

Process and apparatus for treating food products with ozone

According to the invention, the content of peracid, in the presence of hydrogen peroxide, in a solution 2 in which the molar ratio between the concentration of hydrogen peroxide and the concentration of peracid is not higher than 100, is adjusted by means of a process according to which it is drawn by means of a pump 3 into the suction circuits of two pumps 5, 6 which operate at the same flow rate and may draw simultaneously a dilution and/or pH control liquid 9, pump 5 feeding the reference vat 7 of a two-beam photometer and pump 6 feeding its measuring vat 8, and the flow rates of the pumps 3, 5, 6 being adjusted so that the concentration of peracid in the measuring flow 10 is lower than about 100 ppm by weight, an excess of iodide 11 is added to the measuring flow 10 which exits from the pump 6 by means of a pump 13, a measuring unit 14 to which are connected the cells of the photometer compares the intensity of the iodine color formed in the measuring vat 8 to the reference in the reference vat 7 and transfers the difference to a regulator 16 which operates, if necessary, a pump 19 for the injection of the solution of peracid 20 into the solution 2.

Colorimetric processes for the determination and control of the peracid

Stable thickened disinfecting aqueous composition containing an organic

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Guyancourt, France

Pascal Crisinel