Cementation of biodegraded radioactive oils and organic waste

Microbiological pre-treatment of the oil-containing organic liquid radioactive waste (LRW) before its solidification into cement matrix (CM) has been investigated and shown to be efficient. Biodegradation of the oil containing LRW is possible by using the microflora, which oxidize the organic components of the oil to carbon dioxide, water and different oxo-organic compounds, sorb radionuclides and cause emulsification of oil in cement slurry due to biogenic surface-active substances, improving the mixing ability of the LRWCM. Here we present the biotechnological parameters of biodegradation and cementation, and the physical–chemical properties of the final LRWCM.