The ability of the Alcaligenes faecalis 2 strain to utilize acrylamide and acrylic acid upon cultivation with these compounds as the only sources of carbon and energy has been investigated. Complete utilization of the acrylic acid present in the medium at concentrations below 0.113 g/L was observed by cultivation day 5, at a concentration of 0.225 g/L by day 7, and at a concentration of 0.45 g/L by day 17. Complete utilization of the acrylamide present in the medium at concentrations below 0.4 g/L was observed by day 5, at a concentration of 0.9 g/L by day 7, and at a concentration of 1.8 g/L by day 20. Importantly, bacterial growth did not start before complete transformation of acrylamide into acrylic acid. The rate of acrylamide transformation by growing bacteria and a cell suspension in the stationary growth phase amounted to 12.5 mg/L h at a cell concentration of 610 mg/L and 300 mg/L h, at a concentration of 1500 mg/L. A. faecalis 2 cells immobilized on BVV-22 basalt fibers and Carbopon-B-aktiv at concentrations of 3000 and 800 mg dry cells/L, respectively, transformed acrylamide at a rate of 1200 mg/L h.
Applied Biochemistry and Microbiology – Springer Journals
Published: Mar 13, 2018
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