Kinetic model-aided reactor design for peroxidase-catalyzed removal of phenol in the presence of polyethylene glycol
✍ Scribed by Yimin Wu; Keith E Taylor; Nihar Biswas; Jatinder K Bewtra
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1999
- Tongue
- English
- Weight
- 122 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0268-2575
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✦ Synopsis
A batch-mixed reactor and a plug-¯ow reactor were shown to have identical reaction kinetics for peroxidase-catalyzed removal of phenol. Semi-batch operation and step-addition operation of the plug-¯ow reactor with respect to hydrogen peroxide produced similar output. In the presence of polyethylene glycol, a continuous stirred tank reactor needed a long time to complete the reaction at the minimum enzyme dose. It was not necessary to stir the reaction mixture continuously during the reaction, hence polymerization and settling of products happened simultaneously. Recycling of the precipitates was not bene®cial either for the removal ef®ciency or for the operation of a settling tank. A model previously developed to simulate the reaction in a batch reactor was used to predict the process in different types of reactor system. A plug-¯ow reactor system is recommended for the reaction in the presence of polyethylene glycol; the system consisting of a small mixing tank followed by a tank in which reaction and settling occur simultaneously.