| 摘要 |
PURPOSE:To obtain concentrated tomato juice having favorable, characteristic fragrance and color tone of tomato free from heating smell by separating tomato juice by evaporation, concentrating the prepared primary concentrate through reverse osmosis and rectifying the condensed solution. CONSTITUTION:Tomato juice is heated at preferably 40-90 deg.C, vapor corresponding to 10-15wt.% the tomato juice is separated by evaporation to give primary concentrate and condensed solution of the vapor. Then the primary concentrate is concentrated through reverse osmosis, preferably the primary concentrate is passed through a tubular semipermeable membrane under high pressure by one path type and concentrated through reverse osmosis to give secondary concentrate. Separately, the condensed solution is rectified preferably in 1/10-1/30 to give a concentrated aromatic solution and the concentrated aromatic solution is blended with the secondary concentrate. |
