Centre National De La Recherche Scientifique

Institut Francais Du Pe'trole

Cnrs

Ondeo Services

Odyssee Environnement

Ifremer

Université Abderrahmane Mira

Gdf Suez

Bernard Tribollet

Dominique Festy

Jean Olivier Gamby

Lila Chaal

Laurent Kiene

Delphine Herbert-Guillou

Isabelle Frateur

Daniel Rose

Nicolas Monfort-Moros

Rémy Marchal

Bruno Sotta

Boualem Saidani

Laid Makhloufi

Fabrice Guenole Chaussec

Zineb Belarbi

Jean Gamby

Fabrice Guénolé Chaussec

Michel Meyer

Jérôme Poenou

Sylvain Fontaine

Didier Caron

This invention concerns the process for the manufacture of an 'anti-lime scaling' product, that is, a product designed to inhibit the formation of lime scale in elements such as pipes or hoses that could be subject to deterioration over time due to lime scale deposits. Specifically, the process of the invention is for an ecological anti-lime scale product. For this, the process according to the invention comprises a preparation step () of vegetal matter from the Caryophyllacae family, an infusion step () of this vegetal matter, a filtration step () of this infusion and a preparation step () of the anti-lime scale solution from a filtrate obtained during the filtration step.

Manufacturing process for a vegetal matter-based anti-lime scale product

The invention concerns a sensor and a method for detecting microbiologically induced corrosion in a metal structure, which consists in performing the following steps: providing a sensor comprising at least a first circular electrode () and a ring-shaped electrode () concentric with the first electrode, proximate to the structure () in contact with a corrosive medium; imparting for a time interval t a conditioning current between the two electrodes so as to initiate corrosion, the current being such that the central electrode is cathode and the ring-shaped electrode is anode; after the time interval t, coupling the two electrodes and measuring the current between the two electrodes; calculating the speed of corrosion from the measurement.

Method and device for detecting microbiologically induced corrosion

A method for determining the thickness of a biofilm which is developed on a support which is immersed in an aqueous medium in which a biofilm develops, characterized in that it consists in the following: a) the medium is continuously circulated in an electrochemical cell comprising a reference electrode, an auxiliary electrode and at least one working electrode, b) circulation of said medium is interrupted and the cell is isolated; c) an electrochemical tracer is introduced into the medium present in the cell; d) the medium/tracer solution is circulated in the cell in order to direct a jet of said solution, perpendicular to the working electrode; e) the value of the tracer reduction limiting current is measured and recorded according to the hydrodynamic conditions on the surface of the working electrode; and f) the thickness of the porous layer of biofilm on the surface of the electrode is calculated according to the Koutecky-Levich relation, based on analysis of the transport of material through the porous layer which links the value of the tracer reduction limiting current to the solution flow.

Method and device for detecting a biofilm

Growing community of inventors

Malakoff, France

Bernard Tribollet