EVALUATION OF BIOGENIC TRANSFORMATION IN COMPOSITION OF RADIOACTIVE WASTES, INCORPORATED INTO THE DEEP RESERVOIR BED
Contribution of microorganisms to transformation of the composition of radioactive wastes incorporated into the deep reservoir bed Severny was estimated. Physical-chemical and microbiological characteristics of stratal water samples taken from observation wells located within and outside the periphery were studied. As a result, a correlation among changes in the composition and in the number of microorganisms of some physiological groups (denitrifies, aerobic organotrophic bacteria) was identified. Due to denitrification and as nitrate - ion biodecomposes to N<sub>2</sub>, toxicity of LAW decreases. As a result of live activity of aerobic organotrophic bacteria, there is a decrease in the content of organic compounds. It is supposed that aerobic organotrophic microorganisms get into the deep reservoir bed at injecting decantate from surface repositories. The work results can be used at solving a problem of reducing toxicity of Mayak surface repositories.