Rhodia Operations

Agnes Pilas-Begue

Luc Louvel

Robert Eric Talbot

Yvette Pescher

Vincent Schanen

Philippe Marchal

Stephane Carret-Troncy

Mickael Berard

Laetitia Catinon

Gilles Michael Moreau

Mickaël Berard

Stéphane Carret-Troncy

The present invention relates to an organophosphonium derivative of the mean general formula (1), where n is a number comprised between 4 and 20, preferably between 5 and 10, m is a number between 0 and 10, preferably between 0 and 1, and Y is an anion. The invention also relates to a method for preparing same, and to a method for controlling the growth of bacterial biomass in an aqueous system, including adding to said aqueous system or contacting said aqueous system with an efficient amount of an uncoupling agent selected from an organophosphonium derivative as defined above.

Organophosphorus derivatives and use thereof as uncoupling agents

The invention provides the use of a water-soluble biocide as an uncoupling agent at an effective amount to control bacterial biomass in an aqueous system. The invention also provides a method for controlling the growth of bacterial biomass in an aqueous system. The method comprises adding to, or contacting with, the aqueous system an effective amount of an uncoupling agent which is a water-soluble biocide. In a preferred embodiment the method comprises contacting an effective amount of an uncoupling agent which is a water-soluble biocide directly with the bacterial biomass in an aqueous system.

Uncoupling agents

The invention provides the use of an effective amount of a non-oxidizing water-soluble biocide in the improvement of sludge quality by reducing the sludge tendency towards bulking, wherein the biocide comprises an alkyl-substituted phosphonium compound, an alkyl-substituted phosphine, an alkyl-substituted phosphine condensate, or a polymeric quaternary ammonium compound.

Sludge quality

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Miribel, France

Agnes Pilas-Begue