Study on the Effect of Hollow Fiber Membrane Filtration and Ceramic Membrane Filtration on the Quality of Coffee Beverages
To compare the effect of hollow fiber membrane and ceramic membrane filtration treatment on the quality of coffee beverages,a comparative analysis of filtered coffee beverages was carried out on the physicochemical property,sensory evaluation and volatile compound analysis.The results showed that after membrane filtration,the turbidity of coffee beverages decreased and the degree of clarification has increased.The filtration effect of the hollow fiber membrane was better than that of the ceramic membrane,but the filtration flux of the ceramic membrane was higher than that of the hollow fiber membrane.The reduction ratio of caffeine after ceramic membrane filtration was higher than that of hollow fiber membrane filtration,and there was a significant difference between the two treatments.Judging from the sensory evaluation results,the coffee beverage filtered by the hollow fiber membrane had a fuller aroma and a more harmonious and mellow taste.GC-MS was employed to detect the volatile compounds in coffee beverages after membrane filtration.A total of 8 volatile compounds were screened out by statistical analysis,and their contents were significantly different in coffee beverages treated with different membrane filtration.Taking the detected volatile components as independent variables,the two membrane-treated coffee samples could be better distinguished.In actual production and application,it is necessary to comprehensively consider factors such as raw material quality,product attributes,and production costs to select the most suitable filtration method.
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