Concn. of milk prods. by ultrafiltration, addn. of water - or milk prod. of lower concn. and final concn. by ultrafiltration opt. with drying to solid prod.

摘要

Novel process for concn. of milk prods. by (a) concn. of a liq. milk prod. by ultrafiltration; (b) addn. to the concentrate of water or another milk prod. of lower concn. than the initial milk prod. subjected to the ultrafiltration and (c) concn. again by ultrafiltration. The concn. in stage (c) is pref. effected to a vol. identical with that obtd. in step (a). Stages (b) and (c) may be carried out repeatedly. The initial milk prod. is pref. milk, skimmed milk, milk serum or buttermilk. The concentrate obtd. may be dried and the solid prod. obtd. added to a concentrate identical to that which was dried. Alternatively the dry prod. may be added to milk prod. of higher or lower concn. The concentrate may also be only partially desiccated. Conc. milk prods. are useful in prepn. of yogurts, cheese, spreads, cream cheeses and flans. The process is partic. useful for milk prods. which are normally very difficult to concentrate by ultrafiltration without the expenditure of large amts. of energy and time.