Abstract: A process for producing dairy products with a defined lactose content is suggested, comprising the following steps: (a) Ultrafiltration of a starting milk for producing a first permeate P1 and a first retentate R1; (b) Reverse osmosis of the first permeate P1 for producing a second permeate P2 and a second retentate R2; (c) Decalcification of the second retentate R2; (d) Ultrafiltration of the decalcified product of step (c) for producing a third permeate P3 (lactose concentrate) and a third retentate R3 (mineral concentrate); (e) Mixing the first retentate R1 with such an amount of the third permeate P3 and the third retentate R3 each so that a standardized dairy product with a defined concentration of lactose and salts is obtained.

Abstract: Provided is a process for producing milk products free or at least substantially free of lactose (lactose content less than 0.1% b.w.) which includes a combination of a specific heat treatment, filtration, recombination of permeates and retentates thus obtained and optionally hydrolyzation of lactose by lactase.

Abstract: A process for producing lactose-free dairy products is suggested, comprising the following steps: (a) Hydrolysis of a starting milk while adding lactase; (b) Nanofiltration of the hydrolysis product for producing a first permeate P1 and a first retentate R1; (c) Reverse osmosis or nanofiltration of the first permeate P1 for producing a second permeate P2 and a second retentate R2; (d) Mixing the first retentate R1 with such an amount of the second permeate P2 and the retentate R2 that a standardized dairy product is obtained, the content of proteins and minerals of which correspond to the one of the starting milk.

Abstract: A process for producing dairy products with a defined lactose content is suggested, comprising the following steps: (a) Ultrafiltration of a starting milk for producing a first permeate P1 and a first retentate R1; (b) Reverse osmosis of the first permeate P1 for producing a second permeate P2 and a second retentate R2; (c) Decalcification of the second retentate R2; (d) Ultrafiltration of the decalcified product of step (c) for producing a third permeate P3 (lactose concentrate) and a third retentate R3 (mineral concentrate); (e) Mixing the first retentate R1 with such an amount of the third permeate P3 and the third retentate R3 each so that a standardized dairy product with a defined concentration of lactose and salts is obtained.

Abstract: A process for producing dairy products with a defined lactose content is suggested, comprising the following steps: (a) Ultrafiltration of a starting milk for producing a first permeate P1 and a first retentate R1; (b) Nanofiltration of the first permeate P1 for producing a second perorate P2 and a second retentate R2; (c) Hydrolysis of the second retentate R2 while adding lactase; (d) Mixing the first retentate R1 with such an amount of the second permeate P2 and the hydrolysis product of step (c) each that a standardized dairy product is obtained, the content of proteins and minerals of which corresponds to the one of the starting milk.