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Development of a Polyaniline-coated Monolith Reactor for the Synthesis of Cephalexin Using Penicillin G Acylase Aggregates

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Abstract

A monolith reactor for the synthesis of cephalexin was developed using capillary columns. The micro channel in the monolith reactor was coated with polyaniline (PANI), and penicillin G acylase was aggregated with PANI using 0.5% of glutaraldehyde as a cross-linker. The developed monolith reactor exhibited many advantages over other enzyme reactors such as batch and continuous reactors. It showed fast enzyme reaction rates owing to the decrease in external mass transfer and internal diffusion limitations. The reactor can easily be scaled up by bundling together multiple monolith reactors, enabling a corresponding increase in feed rate. Furthermore, the monolith reactor showed good operational stability, with 95% of its original activity maintained after 48 h of continuous operation. The PANI coating on the surface of the capillary column increased the enzyme immobilization capacity and conversion was increased from 15.4% to 70.6% after PANI coating. The conversion ratio increased to approximately 70.6% with an increase in residence time and reactor length.

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  1. Department of Chemical and Biochemical Engineering, Chosun University, Gwangju, 501-759, Korea

    Young Deok Ahn & Jung Heon Lee

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  1. Young Deok Ahn
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  2. Jung Heon Lee
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Correspondence to Jung Heon Lee.

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Ahn, Y.D., Lee, J.H. Development of a Polyaniline-coated Monolith Reactor for the Synthesis of Cephalexin Using Penicillin G Acylase Aggregates. Biotechnol Bioproc E 23, 349–354 (2018). https://doi.org/10.1007/s12257-018-0124-9

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  • DOI: https://doi.org/10.1007/s12257-018-0124-9

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