Biotechnological processes often require the use of immobilized biocatalysts. This translation of the most successful German edition introduces the theoretical background of this rapidly growing field followed by a detailed description of the various techniques of immobilizing, characterizing, and using biocatalysts. The comprehensive discussion of possible applications in industrial processes and in basic research results in a practical guide for everyone involved in these techniques. Furthermore, some selected experiments are added in order to facilitate the understanding of the theoretical reports.