Patent ID: 7642077

Claim:
A biocomposite comprising co-precipitates prepared by the steps of: (i) obtaining a buffered silicate solution comprising alkali metal silicate or an alkyl siliconate salt and having a pH about 5 to about 9, ii) mixing together (a) an enzyme solution comprising one or more enzymes, (b) the buffered silicate solution, and (c) a polyamine or a modified polyamine solution, (iii) simultaneously precipitating the enzymes, the alkali metal silicate or the alkyl siliconate salt, and the polyamine or the modified polyamine from the mixture of the solutions to form a precipitate and a supernatant, and (iv) removing the supernatant and recovering the precipitate to obtain a biocomposite, wherein said biocomposite retains at least 80% of the enzymes from the initial enzyme solution, and the enzymes in the biocomposite retain at least 50% of the catalytic activities in comparison with that of the initial enzyme solution.