Abstract: The Aflatoxin(Afl) degradation ability of some food micro-organisms was investigated through measuring the diameters of fluorescent reaction circles on dish culture and the residual concentrations of Aflb1 after shaking culturing.Amongst these micro-organisms B.subtilis,L.rhamnosus,C.aceticum,which have been proven to be safe through traditional application in food processing,showed areat potential in degradation of Afl.After 60h liquid culture,these 3 organisms cold eliminate 89%,88% and 81% of Aflb1 respectively.The suitable temperature and pH of B.subtilis were also the most suitable factors for Aflb1 degradation Addition of Ca2+ or Mg2+ enhanced the degradatin reaction of Aflb1 by the B.subtilis.

Key words: Food micro-organisms Aflatoxin Degradation