Elimination of unpleasant odors is one of the great challenges the experts dealing with decontamination technologies face. The largest nuisance is caused by smells emanating from the sludge bed (sludge storage areas) designed for natural dewatering of sediments and of surplus sludge from biological treatments facilities. Currently the activated sludge basins are overloaded, and their designed capacity is exceeded by 40 times. Hundreds of thousands of tons of sediment are accumulated on the territories of urban biological treatment facilities. The greatest problem is that the sludge beds are not cleaned for years. As a result, they are getting filled to the top with sludge mixture, rotting and emitting putrid scent. One of the promising trends in solving this problem is the use of biological sorption of stinking odors with subsequent microbial neutralization of the absorbed substances. In this work the screening of microorganisms able to remove effectively foul smells at municipal biological detoxification stations was conducted. Both sewage water and wastewater residues from biological treatment processes were used during the screening. The search of the microorganisms that can remove the unpleasant odors from treatment facilities was carried out based on the collection of microbial xenobiotic degraders (Laboratory of Environmental Biotechnologies, Institute of Microbiology, National Academy of Sciences, Belarus). At the initial stage, the ability of the collection cultures to utilize the organic compounds typical for municipal sewage was tested. Wastewaters from urban biological decontamination networks were used as the model samples for efficiency evaluations. The most active cultures were further checked for deodorizing capacity in sewage and in sediments produced during biological treatment. The screening identified 8 highly active strains able to remove the foul smells of sewage water: Rhodococcus erythropolis 87F, Rhodococcus erythropolis 14D, Rhodococcus opacus 31D, Rhodococcus ruber Н2004, Rhodococcus ruber 1В, Rhodococcus ruber R1, Bacillus sp. Lg1 and Bacillus sp. Lg2. It was found that in 2-3 days after the application of these strains, the malodor vanished completely while decontamination efficiency expressed in chemical oxygen demand (COD) values exceeded by 15-40 % the control parameters. The investigation of the ability of the isolated strains to eliminate the malodor from sewage sediments was done using the samples taken at the sludge collection ponds of biological treatment units. The investigations revealed that the rate of sewage sediment deodorization considerably slower than that for the sewage water. Depending on sediment composition, moisture content and the parameters of degradation process, the intensity of the malodor started declining only in 7-21 days. This may be explained by the higher concentrations of organic compounds in the sediments and the less favorable conditions for their microbial degradation. The critical factors also were the age and humidity of the activated sludge. Strains Rhodococcus erythropolis 87F, Rhodococcus opacus 31D, Rhodococcus ruber R1, Bacillus sp. Lg1 и Bacillus sp. Lg2 were the most efficient in elimination of the foul odor from the sewage sediments. The use of a consortium of these microorganisms made it possible to increase the efficiency of the unpleasant odor removal from sewage sludge by 20-40%. The obtained consortium of microbial degraders was suggested for elaboration of novel biotechnologies aimed at removing the unpleasant odors from sludge treatment facilities.