A Thermomechanical Preprocessing for Pectin Isolation from Orange Peel with Optimisation by Response Surface Methodology
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Sid-Ahmed Rezzoug
The instantaneous controlled pressure drop process (or D.I.C process: ``Détente Instantanée Contrôlée") was used as a pre-treatment prior to pectin acid extraction from orange peel. This process involves subjecting the orange peel for a short time to steam pressure varying from 100 to 700 kPa, followed by an instantaneous decompression to vacuum at 5 kPa. Effects of processing pressure, moisture content of peels before the thermomechanical treatment and processing time were examined with response surface methodology. The optimal conditions were determined and the response surfaces were plotted from the mathematical models. The Fisher test and p-value indicated that both processing pressure and moisture content of peels before the pre-treatment had a highly significant effect on the pectin yield. The quadratic effect of processing pressure as well as the interaction effects of the initial moisture content and processing time also had a significant effect on the response. Moreover, the kinetics of pectin extraction showed that after few minutes of hydrolysis, the yields of pectin were systematically higher than that of the control sample and this is important from industrial point of view because the hydrolysis of pectin is generally performed in 10-15 minutes.
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Artikel in diesem Heft
- Shorter Communication
- Isolation and Physico-chemical Characterization of Mung Bean Starches
- Comparative Study on Storage of Fruits and Vegetables in Evaporative Cool Chamber and in Ambient
- Use of Natural Coagulants of Plant Origin in Production of Soycurd (Tofu)
- Stabilization of Moisture Sorption in Spray-Dried Bioactive Compounds by Using Novel Fibre Carriers to Crystallize the Powders
- Article
- Modelling and Simulation Heat Transfer in Wheat Stored in a Simulated Sealed Pit
- Heat Transfer Coefficient in Helical Heat Exchangers under Turbulent Flow Conditions
- Experimental Studies on Parboiling of Paddy by Ohmic-Heating
- Evaluation of Technological Characteristics of Some Varieties of Sorghum (Sorghum Bicolor) Cultivated in the Soudanosahelian Zone of Cameroon
- Control of Main Stored-Grain Insects with New Formulations of Entomopathogenic Fungi in Diatomaceous Earth Dusts
- A Thermomechanical Preprocessing for Pectin Isolation from Orange Peel with Optimisation by Response Surface Methodology
- Rheological Properties of Chocolate Drink from Cupuassu
- Recovery of Polyphenolics from Apple Juice Utilizing Adsorbent Polymer Technology
- Response to an Article
- Effect of Conditioning on the Production of Inulinase by Kluyveromyces marxianus var. bulgaricus through Fed-Batch Fermentation
