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Cells of amidase containing bacteria of Rhodococcus erythropolis 4-1 and Alcaligenes faecalis 2 were immobilized using carriers such as barium alginate, agarose, chitosan and κ-carrageenan. The aim of the work was to study the effect of bacterial cell immobilization methods on the operational stability of a bio-catalyst. It has been determined that the best carrier for the stable operation of the biocatalyst was aga-rose. The highest amount of acrylic acid was obtained during multi-cycle transformation of acrylamide by immobilized A. faecalis 2 cells.