FIELD: dairy industry.
SUBSTANCE: disclosed is a method of producing industrial water, which involves reverse osmosis treatment of nanofiltration permeate of milk raw material using membranes with NaCl retention of 98% and more at pressure of 2.0-5.5 MPa, temperature of 10-25 °C and a concentration factor of 1-10. Method enables to purify nanofiltration permeates of various milk raw materials.
EFFECT: obtained filtrate has dry substances content of not more than 0,03 g/100 g and specific conductivity of not more than 300 mcS/cm and can be used in equipment washing, except for final washing, as well as in membrane filtration processes involving the use of diafiltration water.
1 cl, 3 ex
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