Centre National De La Recherche Scientifique

Valbio

Inst National Des Sciences Appliquees De Toulouse

Beatrice Biscans

Victor Sanchez

Jean-Pierre Couderc

Mathieu Sperandio

Angela Manas-Llamas

Jean-Pierre Riba

Francois Decker

A method for the biological treatment of wastewater containing pollutants, using an aerobic biomass, includes a plurality of successive cycles of a predefined duration in order to achieve pollutants removal efficiency of 90% or higher, each of the cycles including the following steps: &#x2014;introducing a wastewater effluent containing phosphorus and calcium into a reactor containing biomass; &#x2014;applying an aerobic phase by introducing into the reactor a gas flow containing oxygen for a predefined length of time, sufficient to form aerobic biomass granules; &#x2014;decanting the aerobic biomass granules thus formed; &#x2014;and removing at least part of the treated effluent. After each step of introducing effluent into the reactor, the pH in the reactor is maintained at a value above 8 for a length of time at least equal to 10% of the cycle duration.

Method for the biological treatment of wastewater using an aerobic granular biomass

A method for allowing biological macromolecules contained in a solution to be separated by selective absorption comprising supplying with a solution each stage (3, 4) of a column containing a selective chromatographic resin specific to the macromolecules to be separated, so as to fluidize the beds of resin at each stage, each stage being provided at its base with a perforated distribution system (5) characterized by a percentage of open sections between 0.2% and 10%, a mean diameter of the said open sections greater than approximately 300 microns and between 2G.sub.m and 20G.sub.m, where G.sub.m is the mean granulometry of the resin.

Method for the separation of biological macromolecules by chromatography

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Escalquens, France

Beatrice Biscans