Traditional Molasses Preparation and Optimization Study in Algeria
This study focuses on optimizing the preparation of date syrup, known as molasses, using traditional methods in Algeria. The objective is to maximize bioactive substances, total soluble solids, and % reduction of DPPH, while minimizing the formation of HMF compounds. The process involves washing, cleaning, cutting, immersion, concentration, filtration, and thermal treatment of Mech-Degla dates. Additionally, the study includes the characterization of problematic varietal biodiversity and alterations in date syrup production.
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Global Academic View Conference on Technology and Science Paris 20-21 December 2022 Traditional Dates Molasses Preparation, Characterization and Optimization Adiba BENAHMED DJILALI1, Abdelouahb BENSEDDIK2 , Mohammed Said METAHERI1, katila ALIOUAT1, Said Tayeb BEN MOUHEND and Yacine BOUREMA1 1Faculty of Biological and Agricultural Sciences, Mouloud Mammeri University of Tizi-Ouzou, 15000, Algeria. Corresponding author email: adiba.benahmed@yahoo.fr; Phone : 00213775877909
Problematic Varietal biodiversity of dates in Algeria Amoung dates with dry texture namely common dates characterized by their richness in sugars, fibers and metals. The production of common dates in Algeria reachd 2.87 million Quintals (Ministry of Agriculture). , GAVCTS December 20-21 2022 Paris 1
Problematic Alterations (physico-chimique, microbial and attaks of animals and insects). GAVCTS December 20-21 2022 Paris 2
Problematic Date syrup is know as Rob or Molasses is produced by traditional method in algeria. It is obtained by cooking dates in hot water. This syrup is caracterized by soluble solids rate of around 70 Brix and reddish black color. , GAVCTS December 20-21 2022 Paris 3
Objectives To maximize the rate of bioactive substances, TSS and the % reduction of DPPH and to minimize the HMF compounds formed during the fabrication of date syrup. GAVCTS December 20-21 2022 Paris 4
Preparation of date syrup Washing and cleaning Mech-Degla dates Cutting and immersion in water GAVCTS December 20-21 2022 Paris 5
Concentration at 100 C Filtration Thermal treatment Date syrup GAVCTS December 20-21 2022 Paris 6
Methods & analysis Optimization of conditions of syrup dates three production Table : coded levels of centered composite design of experiments GAVCTS December 20-21 2022 Paris 7
Characteristics of syrups date Physico-chemical syrups (Total Solubles Brix) characterization of Determination of the level of HMF by the spectral method by measuring the OD at 284 nm and 336nm of syrups Antioxydante activity Modelling GAVCTS December 20-21 2022 Paris 8
Results of regression coefficients of models TSS ( Brix) HMF(mg/Kg) (%) Inhibition of DPPH P P P Regression Coefficients a0 a1 a2 a3 a11 a22 a33 a12 a23 a13 R2 Valeurs Valeurs Valeurs 100.279 -0.31169 -0.31169 -1.21322 -0.0178856 0.000292676 -0.0133425 0.00429894 -0.00165895 0.0428571 383.572 -4.59674 -1.37698 -2.92653 0.00896958 0.000578892 0.00574748 0.0122751 0.00433256 0.0194048 146.695 0.688906 -0.769715 -0.591027 -0.00626779 0.00199157 0.00588764 0.00159061 -0.000966435 0.00087963 0.8486 0.3147 0.1212 0.6770 0.9358 0.3710 0.7841 0.8560 0.1956 0.3088 0.1698 0.3274 0.7115 0.7786 0.4121 0.1906 0.4121 0.2911 0.9545 0.5226 0.8238 0.5634 0.0545 0.1347 0.6876 0.6755 0.9110 47.9542(%) 53.498 (%) 53.4982 (%) GAVCTS December 20-21 2022 Paris 9
Results of the optimal conditions of fabrication of date syrups Heat treatment time Heat treatment temperature Concentration time t=240.527 min T=100.159 C t=90.27min GAVCTS December 20-21 2022 Paris 10
Results of the predicted responses of syrups date Contours of Estimated Response Surface Concentration time=60,0 Contours of Estimated Response Surface Concentration time=60,0 Contours of Estimated Response Surface Concentration time=60,0 260 DPPH 83,0 85,4 87,8 90,2 92,6 95,0 97,4 99,8 102,2 104,6 107,0 260 HMF 104,6 260 TSS 47,0 -1,0 102,2 -7,0 -1,0 5,0 11,0 17,0 23,0 29,0 35,0 41,0 47,0 53,0 41,0 30,0 35,0 40,0 45,0 50,0 55,0 60,0 65,0 70,0 75,0 80,0 99,8 70,0 35,0 97,4 29,0 230 230 230 95,0 23,0 65,0 Treatment time Treatment time 17,0 Treatment time 92,6 200 200 200 5,0 11,0 60,0 90,2 170 170 170 87,8 90,2 5,0 55,0 140 50,0 140 50,0 140 92,6 45,0 95,0 -1,0 11,0 40,0 97,4 110 110 110 64 74 84 94 104 64 74 84 94 104 64 74 84 94 104 Treatment temperature Treatment temperature Treatment temperature TSS Level of HMF % Inhibition of DPPH TSS=88.115 Brix t=62.8453 (mg/Kg) % Inhibition =100% GAVCTS December 20-21 2022 Paris 11
Results of the desirability Desirability Plot Concentration time=60,0 Desirability 0,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0 Overall Desirability d= 94.46% 1 0,8 Desirability 0,6 0,4 0,2 230260 0 110140170200 Treatment time 64 74 84 94 104 Treatment temperature GAVCTS December 20-21 2022 Paris 12
Prspectives It is interesting to used this syrup as actif ingredient in confectionary and the fabriction of light pharmaceutical industry drinks and in Encourage innovative processes in order to preserve and to transforme dates exes production such as (Traetment of dates by SWEL DRYING DIC) young investors to apply GAVCTS December 20-21 2022 Paris 13
Thank you for your attention ADIBA BENAHMMED DJILALI Email :adiba.benahmed@yahoo.fr
