| 摘要 |
FIELD: food industry.SUBSTANCE: invention relates to food industry. Pectin production method envisages washing before hydrolysis-extraction of milled pectin-containing raw material with drinking water for 0.5-1.5 hour with simultaneous mixing at 10-30 rpm and t = 40-60 °C, separation of the obtained mixture into solid and liquid phases, mixing the solid phase with purified water in the ratio of 1:10-1:40. Herewith the drinking water is preliminarily purified on a two-stage reverse osmosis plant. Mixture obtained after washing is heated up to 50-80°C with simultaneous stirring and circulation, hydrolysis-extraction is performed by cavitation treatment in a rotary-oscillatory apparatus with further separation of pulp into solid and liquid phases in a vacuum drum filter. Obtained liquid phase is centrifuged with the relative centrifugal force of F= 2,000-5,000 g followed by microfiltration at P = 0.1-0.3 MPa and V = 0.06-0.16 l/sec, ultrafiltration at P = 0.2-0.6 MPa and V = 0.15-0.30 l/sec, diafiltration at P = 0.2-0.6 MPa and V = 0.1-0.27 l/sec till pectin substances concentration reaches 1-2 %. Herewith ultrafiltration and diafiltration are carried out on tangential filters with ceramic membranes. Then it is thickened in a vacuum-evaporator till dry substances content reaches 3-8 % and spray-dried at the air temperature of 150-200 °C.EFFECT: output of the pectin is 70-84 % of theoretically possible one.1 cl, 4 tbl, 3 ex |
