Technological breakthrough of the agrarian-and-food innovations in dairy case for example of universal agricultural raw materials. Nanofiltration

Abstract

Aim. Consideration nanofiltration as a process of membrane technology – directed and controlled filtration of whey through special semipermeable partitions (membrane filters) with a pore size of 1-5 nm, carried out at a pressure of 0.7-4.0 MPa with the release of particles with a molecular weight of 0.5-1.0 kDa. Discussion. Nanofiltration allows you to separate the whey as a system by the size of the components – microparticles and macromolecules. In this case, from pre – separated, processed by microfiltration and ultrafiltration of whey to nanoconcentrate (retentate) pass almost all the compounds of whey, and in nanofiltrate (permeate) - only monovalent ions of mineral salts and partially some organic acids. Nanofiltration, in the logistics of molecular sieve separation of whey, takes over from ultrafiltration and is a harbinger of reverse osmosis. The theoretical foundations of the nanofiltration process are developed at a fairly good level. The basic element of the process is the membranes. Based on the conducted research, we can recommend the nanofiltration process for industrial processing of salted whey into milk sugar (lactose) and for concentrating whey and its ultrafiltrates before electrodialysis or ion exchange desalination. Nanofiltration is already widely used in the production of high-quality lactose (milk sugar). Considerable interest nanofiltration cottage cheese (acid) whey with the purpose of concentration, demineralization and sensory nanoconcrete for the enrichment of ice cream. Conclusion. Nanofiltration can be quite reasonably used for processing, within the framework of the Technological Breakthrough, universal agricultural raw materials – for example, whey and its ultrafiltrates – for the purpose of concentration, directed demineralization, lowering the level of organic acids and controlling sensorics. The resulting nanoconcentrate (retentate) can be used to scale functional products.