Evaluation of the quality of the date syrups enriched by cheese whey during the period of storage

Abstract

This study was carried out to the valuing of the date variety H’mira (very rich’s in sugars and in nourishing elements) and the cheese whey for production of novel syrups. Four samples syrups were manufactured: control represent date syrup obtained after hot extraction at a concentration 20 %, syrups (A) represent control with 10 % of cheese whey, syrup (B) with 20 % and syrup (C) with 30 % of cheese whey. These syrups were stored during 3 weeks at 4 °C. The biochemical, microbiological and sensory evaluations for all syrups were evaluated every week of storage. The biochemical characterization of syrups showed that it’s richness in total sugars, proteins contents, ash and dry mater. The syrup of date enriched with 10 % of liquid acid cheese whey present a good biochemical quality (higher level of sugars, proteins and ash) and important sensorial properties (color, odor and flavor). This syrup can be used for beverage or as medium to fermentation for production a new products. Keyword: Date, Syrup, H’mira, Cheese whey, Quality, Storage.