(FR2730584-A1)      Oils and solvents contaminated by radioactive substances are treated by: (a) prepg. a vol. of water with predetermined dissolved O2 content, pH and redox potential; (b) adding to the water a vol. of contaminated oil or solvent which is only a fraction of the vol. of water; (c) allowing microorganisms to act on the mixt. at a predetermined temp. and for a predetermined time; (d) removing (part of) the effluent; (e) sepg. water from the material in the effluent; (f) recycling or rejecting the sepd. matter; (g) regenerating the water freed from the matter of the effluent, to restore the predetermined characteristics; (h) recycling (part of) the regenerated water; and (i) starting the cycle again from stage (a). An appts. is also claimed.    ADVANTAGE -   Air and water can be released into the atmosphere or the drains under strictly controlled conditions. The radioactive matter is collected in a very small vol. of waste, which is easily treated and stored. Gelling of the oxidn. prods. from the oils and solvents is avoided.    (EP808504-A1)      Oils and solvents contaminated by radioactive substances are treated by: (a) prepg. a vol. of water with predetermined dissolved O2 content, pH and redox potential; (b) adding to the water a vol. of contaminated oil or solvent which is only a fraction of the vol. of water; (c) allowing microorganisms to act on the mixt. at a predetermined temp. and for a predetermined time; (d) removing (part of) the effluent; (e) sepg. water from the material in the effluent; (f) recycling or rejecting the sepd. matter; (g) regenerating the water freed from the matter of the effluent, to restore the predetermined characteristics; (h) recycling (part of) the regenerated water; and (i) starting the cycle again from stage (a). An appts. is also claimed.    ADVANTAGE -   Air and water can be released into the atmosphere or the drains under strictly controlled conditions. The radioactive matter is collected in a very small vol. of waste, which is easily treated and stored. Gelling of the oxidn. prods. from the oils and solvents is avoided.    (EP808504-B1)      Oils and solvents contaminated by radioactive substances are treated by: (a) prepg. a vol. of water with predetermined dissolved O2 content, pH and redox potential; (b) adding to the water a vol. of contaminated oil or solvent which is only a fraction of the vol. of water; (c) allowing microorganisms to act on the mixt. at a predetermined temp. and for a predetermined time; (d) removing (part of) the effluent; (e) sepg. water from the material in the effluent; (f) recycling or rejecting the sepd. matter; (g) regenerating the water freed from the matter of the effluent, to restore the predetermined characteristics; (h) recycling (part of) the regenerated water; and (i) starting the cycle again from stage (a). An appts. is also claimed.    ADVANTAGE -   Air and water can be released into the atmosphere or the drains under strictly controlled conditions. The radioactive matter is collected in a very small vol. of waste, which is easily treated and stored. Gelling of the oxidn. prods. from the oils and solvents is avoided.    (US5948259-A)      Oils and solvents contaminated by radioactive substances are treated by: (a) prepg. a vol. of water with predetermined dissolved O2 content, pH and redox potential; (b) adding to the water a vol. of contaminated oil or solvent which is only a fraction of the vol. of water; (c) allowing microorganisms to act on the mixt. at a predetermined temp. and for a predetermined time; (d) removing (part of) the effluent; (e) sepg. water from the material in the effluent; (f) recycling or rejecting the sepd. matter; (g) regenerating the water freed from the matter of the effluent, to restore the predetermined characteristics; (h) recycling (part of) the regenerated water; and (i) starting the cycle again from stage (a). An appts. is also claimed.    ADVANTAGE -   Air and water can be released into the atmosphere or the drains under strictly controlled conditions. The radioactive matter is collected in a very small vol. of waste, which is easily treated and stored. Gelling of the oxidn. prods. from the oils and solvents is avoided.    (JP2000515622-W)      Oils and solvents contaminated by radioactive substances are treated by: (a) prepg. a vol. of water with predetermined dissolved O2 content, pH and redox potential; (b) adding to the water a vol. of contaminated oil or solvent which is only a fraction of the vol. of water; (c) allowing microorganisms to act on the mixt. at a predetermined temp. and for a predetermined time; (d) removing (part of) the effluent; (e) sepg. water from the material in the effluent; (f) recycling or rejecting the sepd. matter; (g) regenerating the water freed from the matter of the effluent, to restore the predetermined characteristics; (h) recycling (part of) the regenerated water; and (i) starting the cycle again from stage (a). An appts. is also claimed.    ADVANTAGE -   Air and water can be released into the atmosphere or the drains under strictly controlled conditions. The radioactive matter is collected in a very small vol. of waste, which is easily treated and stored. Gelling of the oxidn. prods. from the oils and solvents is avoided.