Hydrolysis of whey lactose by immobilized β-galactosidase in a bioreactor with a spirally wound membrane.

The β-galactosidase was covalently immobilized onto a modified polypropylene membrane, using glutaraldehyde. The optimal conditions for hydrolysis of lactose (4.7%) by immobilized β-galactosidase in a batch process were determined 13.

Immobilization of β-galactosidase on modified polypropilene membranes.

A new immobilized system: β-galactosidase-modified polypropylene membrane was created. It was obtained 13 different carriers by chemical modification of polypropylene membranes by two stages. The first stage is treatment with K(2)Cr(2)O(7) to receive carboxylic groups on membrane surface.