The liquid effluent issued from yeast culture on hydrolyzate (product
of saccharification of vegetal matter) has a high organic charge, most
of which is composed of refractive components. The pretreatment of th
is effluent by cationic floculent increased the activity of a selected
fungal bioconversion microflora, the production of biomass and reduce
d significantly the pollution charge of the effluent.