Valbio

Inst National Des Sciences Appliquees De Toulouse

Francois Decker

Beatrice Biscans

Mathieu Sperandio

Angela Manas-Llamas

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.

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Quint Fonsegrives, France

Francois Decker