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Updated: Feb 15, 2026

Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization
Published on: July 11, 2012
Modeling and simulation of enzymatic gluconic acid production using immobilized enzyme and CSTR-PFTR circulation
Can Li1, Jianqun Lin1, Ling Gao2
1State Key Laboratory of Microbial Technology, Microbiology Technology Institute, Shandong University, Jinan, 250100, China.
Objectives:
Production of gluconic acid by using immobilized enzyme and continuous stirred tank reactor-plug flow tubular reactor (CSTR-PFTR) circulation reaction system.
Results:
A production system is constructed for gluconic acid production, which consists of a continuous stirred tank reactor (CSTR) for pH control and liquid storage and a plug flow tubular reactor (PFTR) filled with immobilized glucose oxidase (GOD) for gluconic acid production. Mathematical model is developed for this production system and simulation is made for the enzymatic reaction process. The pH inhibition effect on GOD is modeled by using a bell-type curve.
Conclusions:
Gluconic acid can be efficiently produced by using the reaction system and the mathematical model developed for this system can simulate and predict the process well.
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