Enzyme Immobilization.pdf

Enzyme immobilization is a crucial technology for enabling the use of enzymes in various applications. The advantages of using enzymes include renewable and biodegradable feedstock, mild conditions, high rates, and high chemo, regio, and enantioselectivity. However, enzymes have limitations such as low operational stability and shelf life, cumbersome recovery and re-use, product contamination, and potential allergic reactions.

Immobilization addresses these challenges by providing stability, repeated re-use of biocatalysts, easier downstream processing, and continuous process technology. There are several types of immobilization, including binding to a carrier, entrapment, and cross-linking. Cross-Linked Enzyme Aggregate (CLEA) technology is a promising approach, which involves cross-linking enzymes with glutaraldehyde to form a stable and active biocatalyst.

Glutaraldehyde is a common and effective protein cross-linking agent, but its cross-linking chemistry is not fully understood. The type of covalent bond formed depends on various factors, including glutaraldehyde concentration, amine concentration, pH, and temperature. The CLEA technology offers several advantages, including high stability, repeated re-use, and easier downstream processing, making it an attractive solution for enzyme immobilization.