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Type: Artigo de periódico
Title: Effects of acid concentration and extrusion variables on some physical characteristics and energy requirements of cassava starch
Author: Chang, Y.K.
El-Dash, A.A.
Abstract: Some physical characteristics of cassava starch extruded using a single-screw extruder, varying acid concentration, feed moisture content and barrel temperature were evaluated using surface response methodology. The combined effects of different concentrations of sulphuric acid and extruder parameters provided unique physical functionality to the extruded cassava starch. Product hardness and torque value was highly significant for three variables. The addition of sulphuric acid (0.06N) during extrusion cooking gave the highest values for expansion and softness of the extruded samples. The highest torque values (60-70 Nm) were for the samples extruded at the lowest moisture content, while the lowest torque values (23.0-26.0 Nm) were for the samples extruded at the highest values of feed moisture and barrel temperature.
Subject: Single-screw extruder
sulphuric acid
cassava starch
Editor: Brazilian Society of Chemical Engineering
Rights: aberto
Identifier DOI: 10.1590/S0104-66322003000200006
Date Issue: 1-Jun-2003
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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