The nutritious plant ingredients of hop and rosemary (hop bitter acids as well as carnosol and carnosic acid) were enriched and separated by using aqueous templates for the first time by foam fractionation in pilot plant scale. To evaluate the efficiency, described by the enrichment (ER) and recovery respectively rate of yield (R), and due to lack of experience values of this method in pilot plant scale, investigations were previously made in the laboratory scale. Depending on the process parameters, comparable high enrichment factors in both standards were achieved (ER = 5 - 20). But there were differences in the recovery values. Comparing the maximum amount of solvable substance in the raw material with those in the foam, lower values were achieved in the pilot plant scale, due to the lower solubility behaviour, which was caused by procedural parameters. Comparing the amount of dissolved substance with those in the foam, similar recovery values were achieved even in the pilot plant scale (R = 24 %) as in the laboratory scale (R = 30 %). It remains to be stated, that foam fractionation can be used as an alternative manufacturing technology for the production of herbal extracts in pilot plant and probably also in industrial scale.
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The nutritious plant ingredients of hop and rosemary (hop bitter acids as well as carnosol and carnosic acid) were enriched and separated by using aqueous templates for the first time by foam fractionation in pilot plant scale. To evaluate the efficiency, described by the enrichment (ER) and recovery respectively rate of yield (R), and due to lack of experience values of this method in pilot plant scale, investigations were previously made in the laboratory scale. Depending on the process parame...
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