Sewage pollution by heavy metal ions is one of the most pressing problems at the moment. The
problem, that directly affects the quality of water and the subject of scientific research is water pollution by metal
compounds, including chromium ions. Chromium is considered dangerous for the environment and the human body due
to its accumulation in the body and its direct effect on internal metabolic processes. Chromium ions can easily change
their behavior from one medium to another, thereby easily passing through various biochemical processes and quickly
affecting other chemical and physical reactions in the body. Toxic processes resulting from the action of heavy metal
ions on the body manifest themselves in the form of acute and chronic poisoning, the occurrence of allobiotic processes,
as well as special intoxication processes, such as mutagenesis and carcinogenesis. The article describes the
microbiological technology of wastewater treatment from hexavalent chromium ions, which allows to significantly
simplify the technology of wastewater treatment, speed up the treatment process and reduce costs.