Patent Number: 
Section: claims

1. A composition for transmuting a radioactive substance into a non-radioactive substance, comprising a mixed culture of microorganisms comprising:a radiation-resistant microorganism selected from the group consisting of Deinococcus sp., and Bacillus sp.;a yeast selected from the group consisting of Cryptococcus sp., Saccharomyces sp. and Trichosporon sp.;a fungus selected from the group consisting of Irpex sp. and Phanerochaete sp.;a photosynthetic bacteria species selected from the group consisting of Rhodobacter sp.; Chlorobium sp., Chromatium sp., Rhodospirillum sp., and Rhodopseudomonas sp.; anda green algae selected from the group consisting of Trebouxia sp., Stichococcus sp., Eliptochloris sp. and Coccomyxa sp;wherein each of the microorganisms is present at a concentration of 0.5×102 CFU/ml to 2.5×1010 CFU/ml. 2. The composition according to claim 1, wherein the radiation-resistant microorganism is selected from the group consisting of Deinococcus radiodurans, Bacillus safensis and Bacillus pumilus; the yeast is selected from the group consisting of Saccharomyces boulardii, Saccharomyces servazzii, Saccharomyces cerevisiae, Trichosporon cutaneum and Trichosporon loubieri; the fungus is selected from the group consisting of Irpex lacteus, Irpex hydnoides, Phanerochaete chrysosporium and Phanerochaete sordida; the photosynthetic bacterial species is selected from the group consisting of Rhodobacter sphaeroides and Rhodobacter capsulatus; andthe green algae is selected from the group consisting of Coccomyxa viridis and Stichococcus sp. 3. The composition according to claim 1, wherein the microorganisms are present in a total amount of 0.05% by weight to 60% by weight, based on the weight of the composition. 4. The composition according to claim 1, wherein the radioactive substance is cesium (Cs), uranium, iodine, strontium, iridium, radium or plutonium. 5. The composition according to claim 1, further comprising an environmentally acceptable carrier. 6. The composition according to claim 1, wherein the composition is used to dispose of radioactive waste or to treat soil, groundwater or wastewater, contaminated with radioactive substances. 7. A method for preparing the composition for transmuting a radioactive substance into a non-radioactive substance as set forth in claim 1, the method comprising:culturing the radiation-resistant microorganisms, the yeast, the fungi, the photosynthetic bacteria, and the green algae in culture medium individually or at least partially together; andmixing the cultured microorganisms to form the composition. 8. The method according to claim 7, wherein the microorganisms are cultured at a temperature of 20° C. to 40° C. for 12 hours to 7 days. 9. The method according to claim 7, wherein the cultured microorganisms are mixed with stirring.