Veolia Eau, Compagnie Generale Des Eaux

Veolia Water Solutions & Technologies Support

Otv Sa

Veolia Proprete

Cyrille Lemoine

Yves De Coulon

Carine Beriet

Arnaud Bucaille

Patricia Grelier

Marie-Pierre Denieul

Olivier Daniel

Eric Bodevin

Carine BÉRIET

Cédric Molard

Caroline Riesenmey

Thomas Lagier

Marc Moreau

Daniel Jung

The invention concerns a device for measuring the pH of an effluent, said device comprising means for measuring an item of information representative of the pH of said effluent intended to be brought into contact with said effluent. According to the invention, such a device further comprises means for modifying the pH value of said effluent close to said means for measuring.

PH value measuring device comprising in situ calibration means

An amperometric sensor circuit for measuring chlorine concentration in water. The circuit includes first and second working electrodes coated with a hydrophilic membrane. A power supply and biasing circuit is configured to deliver a generally constant voltage between the first working electrode and a reference electrode and to generally deliver a constant current between the second working electrode and a counter electrode. A measurement circuit measures the current between the counter electrode and the first working electrode. A processing circuit is provided for determining the chlorine concentration based on the current measured by the measurement circuit.

Device for measuring the free chloride content of water

The invention relates to a method of qualifying the variability of the composition of an effluent, in which method a series of measurements is effected over time of at least one first and one second parameter of the effluent. The invention is characterized in that, in each time step, first and second derivatives of the parameters are determined, first and second logical domains are defined, probabilities of the first derivatives belonging to the first logical domains are assigned, probabilities of the second derivatives belonging to the second logical domains are assigned, global logical domains are defined, global probabilities of belonging to the global logical domains are assigned, and the variability of the composition of the effluent is qualified on the basis of these global probabilities of belonging to the global logical domains.

Method for qualifying the variability of an effluent composition

A method of biologically treating water and more particularly, a process for nitrifying and denitrifying water includes employing a continuous aeration mode and a sequential aeration mode. In the continuous aeration mode, nitrification and denitrification reactions occur simultaneously in the water. The continuous aeration mode occurs when the nitrate concentration of the water reaches a predetermined low threshold. The sequential aeration mode occurs when the nitrate concentration reaches a predetermined high threshold. When in the sequential aeration mode, aeration is ceased when the ammoniac concentration reaches a predetermined low threshold and aeration is activated when the ammoniac concentration reaches a predetermined high threshold.

Biological water treatment by alternating continuous and sequential aeration

Growing community of inventors

Sartrouville, France

Cyrille Lemoine