| 摘要 |
The disclosure relates to a method and an apparatus for recovering and recycling aroma substances in a process for the production of products based on berries and/or fruits, for example jams, cordial etc., in which the berries and/or fruits are cooked in water at reduced pressure for driving off released gases and penetrating the cooking mass. Gases driven off from the cooking mass are cooled for the formation of a first aroma-poor gas phase and a first aroma-rich concentrated liquid phase which is separated from the first aroma-poor gas phase and is recycled to the cooking mass. The separated first aroma-poor gas phase is once again cooled for the formation of a second aroma-poor gas phase and a second aroma-rich condensed liquid phase which is separated from the second aroma-poor gas phase and is recycled to the cooking mass. As a result of this cooling of the driven-off gases in two stages and recycling of both of the thus formed, condensed liquid phases to the cooking mass, a pratically complete recovery, recycling and re-use of otherwise lost aroma substances has become possible. |
