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Rueil - Malmaison, France

Veolia Environnement S.A. is a French transnational company with activities in four main service and utility areas traditionally managed by public authorities – water supply and management, waste management, energy and transport services. In 2012, Veolia employed 318,376 employees in 48 countries. Its revenue in that year was recorded at €29.4 billion. It is quoted on Euronext Paris and the New York Stock Exchange. It is headquartered in the 16th arrondissement of Paris.Between 2000 and 2003 the company was known as Vivendi Environnement, having been spun off from the Vivendi conglomerate, most of the rest of which became Vivendi. Prior to 1998 Vivendi was known as Compagnie Générale des Eaux. Wikipedia.

An industrial scale batch or semi-continuous batch PHA extraction process wherein the process operating conditions and control may be quantitatively tuned to batch-to-batch variations based on a practical bench scale assessment but more preferably by means of a calibrated chemometric assessment of the biomass quality. Tuning involves the selection of biomass loading conditions that are commensurate with process solvent and PHA type. Batch operating times and temperatures are matched to modelled and monitored extraction kinetics. PHA-rich solvent gelation is exploited by controlling PHA-rich solvent gel formation. In combination a process Is disclosed that permits for robust and consistent recovered product quality control while at the same time enabling to improve overall process economics.

The invention pertains to a method for treating an effluent to be treated in order to reduce its phosphates content, said method comprising a step of anoxic biological treatment of said effluent to be treated, producing a first effluent, a step of aerobic biological treatment of said first effluent, producing a second effluent, a step of recirculating at least a part of said second effluent to the inlet of said anoxic biological treatment step, a step of liquid/solid separation of at least a part of said second effluent, producing a treated effluent and a first denser effluent, a step for producing volatile fatty acids including a wet heat treatment, at a temperature of 100 C. to 350 C., for a residence time of between 10 and 180 minutes, of at least a part of said first denser effluent, a step of anaerobic biological treatment of at least a part of the effluent coming from said wet heat treatment step, and a step of recirculating at least a part of the effluent coming from said anaerobic biological treatment step to the inlet of said anoxic biological treatment step.

Veolia | Date: 2015-02-23

A rotary disc filter device includes a rotary drum and one or more disc-shaped filter members secured about the drum. Each disc-shaped filter member includes a filter and a filter support comprising a series of modules. The modules each include a base that is secured to the rotary drum and a support arm projecting outwardly from the base. The modules are interconnected and disposed around the rotary drum.

A method of enhancing mechanical properties of compounds formed with polyhydroxyalkanoates (PHA) recovered by biomass where the biomass comprises PHA and non-PHA materials. The method includes dissolving the PHA and non-PHA materials in a solution and separating the PHA and non-PHA materials from the solution. Further, the method includes compounding the separated PHA material and at least some of the separated non-PHA material into a compounded plastic having improved mechanical properties.

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.

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