During the growth of A. carbonarius, the rates of biomass growth, phytase production and phytic acid content reduction in canola meal media during solid state fermentation were higher in the presence of Na-oleate or Tween-80 than in the control medium which was not supplemented with these surfactants. Addition of Triton X-100 had a negative effect on the studied processes. The optimum concentration of Na-oleate in solid state culture media was 1%.