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2009•Guangdong nongye kexueOpen access

Study on Extrusion Technology for Increase of Soluble Dietary Fiber Content in Sweet Potato Residues

Ying Li

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Abstract

The soluble dietary fiber(SDF) was made by using the residues of sweet potato as raw material.The insoluble dietary fiber was converted to SDF by treatment with twin-screw extruder.The optimal processing parameters were established as follows: water content of material 18.75%;extrusion temperature 159.7 ℃;speed of screw 91 r/min.Under above-mentioned conditions,the SDF content in the treated material was 9.64%,which was 6.3 percent higher than that in the untreated material.

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What this paper is about

The soluble dietary fiber(SDF) was made by using the residues of sweet potato as raw material.The insoluble dietary fiber was converted to SDF by treatment with twin-screw extruder.The optimal processing parameters were established as follows: water content of material 18.75%;extrusion temperature 159.7 ℃;speed of screw 91 r/min.Under above-mentioned conditions,the SDF content in the treated material was 9.64%,which was 6.3 percent higher than that in the untreated material.

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Available abstract

The soluble dietary fiber(SDF) was made by using the residues of sweet potato as raw material.The insoluble dietary fiber was converted to SDF by treatment with twin-screw extruder.The optimal processing parameters were established as follows: water content of material 18.75%;extrusion temperature 159.7 ℃;speed of screw 91 r/min.Under above-mentioned conditions,the SDF content in the treated material was 9.64%,which was 6.3 percent higher than that in the untreated material.

Key concepts: Extrusion, Plastics extrusion, Raw material, Extrusion cooking, Food science, Fiber, Water content, Dietary fiber

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