Journal of Advanced Research in Science and Technology
Volume 6, Numéro 2, Pages 1078-1089
2019-07-30
Valorization Of Date Waste: Comparative Study Between The Dry Variety Of Dates Mech-degla And The Must Of Fermentation
Authors : Bouchachia Souad .
Abstract
The fruit of the date palm (Phoenix dactylifera) is one of the most abundant fruits in the Middle East and North Africa. Waste such as date pits represents an average of 10% of the date fruits. The aim of the study is to valorize dates of low market value Mech-Degla..The approach consists first, to better know this raw material, and therefore to analyze it, which will make it possible to detect the possible qualities of these dates. The physico-chemical characterization of date waste reveals the following results: The pulp of the date has a weight percentage of 82.79% in the whole fruit, a humidity of 14.4 ± 0.35, a slightly acidic pH of 5.62, acidity at 0.24% (fresh material), a reducing sugar content of 24.23% (FM) and 2% (FM) ashes. The fermentation must prepared from these dates is characterized by a decrease in pH to 3.4, a reduction in the content of reducing sugars (4.88%), and ashes (0.3%). Acidity increased by 1.1%, the biomass is 3g/l (dry matter) at the end of the fermentation. The bacterial strains isolated from the must are represented by Y (Saccharomyces), SNC (Penicillium), S (Leuconostoc), U (Pediococcus), X (Leuconostoc), Z (Pediococcus). Use of waste the date in the production processes is likely.
Keywords
Date waste, Fermentation, Mech-Degla, Must, Valorization.
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