PROCESS FOR PRODUCING LACTOSE-FREE DAIRY PRODUCTS (I)

摘要

A process for producing lactose-free dairy products, comprising the following steps: (a) Hydrolyzing starting milk while adding lactase; (b) Subjecting the hydrolyzation product of step (a) to nanofiltration for producing a first permeate P1 and a first retentate R1, said open-pore nanofiltration membrane having a pore diameter in the range of about 100 to about 1,000 Dalton; (c) Subjecting said first permeate P1 to reverse osmosis for producing a second permeate P2 and a second retentate R2; and (d) Mixing said first retentate R1 with such an amount of each of the second permeate P2 and the second retentate R2 that a standardized dairy product is obtained, the content of proteins and minerals of which corresponds to the one of the starting milk.