再造烟叶蒸发器冷凝水中致香物质的回收利用可行性分析

Feasibility Analysis on the Reclamation of Aroma Substances from Evaporator Condensate During Reconstituted Tobacco Production

为考察造纸法再造烟叶生产过程中蒸发器冷凝水中致香物质的回收利用可行性,分别采用溶剂萃取法和反渗透膜浓缩法对其进行了富集,并选用后者富集得到的浓液分别开展了浓缩液和辊压法薄片应用可行性研究。结果表明:(1)虽然蒸发器冷凝水中的主要致香物质含量均较低,但由于其水量较大,故对其进行富集回用仍然具有一定意义。(2)溶剂萃取法可以富集蒸发器冷凝水中至少9种致香物质,但是该方法耗费溶剂,且操作复杂,难以大规模应用;而反渗透膜浓缩法可满足工业化应用要求,其主要致香物质的回收率在31%~58%之间。(3)在造纸法再造烟叶浓缩液和辊压法薄片生产过程中添加一定比例的蒸发器冷凝水反渗透膜浓液后,二者的主要低沸点致香物质含量均随添加比例的增加而增加,说明蒸发器冷凝水中的致香物质经过富集具有一定直接利用可行性。以上研究可为造纸法再造烟叶生产过程中蒸发器冷凝水中致香物质的回收利用提供参考依据。

In order to investigate the feasibility of the reclamation of aroma substances from the evaporator condensate during reconstituted tobacco production,the evaporator condensate was enriched by solvent extraction and reverse osmosis membrane concentration method,respectively.Meanwhile,the liquid obtained by the latter method was selected to carry out the feasibility study on the application of concentrated liquid and rolled tobacco sheet.The results showed that:(1)Although the content of the main aroma substances in the evaporator condensate was relatively low,it was still meaningful to enrich and reuse it due to its large amount of water.(2)The solvent extraction could concentrate at least 9 kinds of flavor substances in evaporator condensate.Nevertheless,it was difficult to apply in large scale owing to consuming solvents and its complex operation;the reverse osmosis membrane concentration method could meet the requirements of industrial application,and the recovery rate of the main substances ranged from 31%to 58%.(3)After adding a certain proportion of concentrated liquid handled by reverse osmosis membrane from evaporator condensate water both in the production of concentrated liquid based on reconstituted tobacco production and in rolled tobacco sheet production,the content of the main low boiling point flavoring substances in both increased with the increase of the proportion.Obviously,this indicated that the concentration of the aroma substances in the evaporator condensate was feasible for direct utilization.In conclusion,the research provided a reference for the reclamation of the flavor substances from the evaporator condensate during reconstituted tobacco production by papermaking process.