Abstract
The Indian dairy industry is highly diversified in terms of milk production, collection, processing and waste disposal. Membrane processing allows dairy sector to manufacture high quality nutritive dairy products at lower costs with minimum water use and product losses. Compared to prevailing traditional methods of milk concentration, reverse osmosis (RO) is still evolving, finding newer applications in dairy processing because of its potential benefits. A brief overview of RO, membranes, process variables, fouling, merits and demerits along with potential suppliers and membrane utilizing dairy plants in India are systematically presented in this review. Different applications of RO in dairy industry including concentration of liquid dairy streams, further utilization of RO retentate in formulation of ice-cream, dahi, traditional Indian dairy products, cheese and dried powders is also included. RO can play a prominent role in Indian dairy sector for simplifying the process automation, product diversification and efficient waste utilization.
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