Immobilized cells with endocellular enzymes improved by the permealizing and crosslinking treatment.

In order to achieve high activity of enzymatic catalysis, the method of permealizing and crosslinking treatment has been suggested for immobilizing cells with endocellular enzymes. Polyethene-polyamine and glutardehyde were used to enhance the activity and stability of E. coli having aspartase entrapped in k-carrageenan gel and intact P. dacunhae cells having aspartate-beta-decarbonoxylase. The strength and enlargement effects, which favor the performance of catalysis in a packed bed reactor and a membrane reactor, respectively, were also obtained from the experiment results.