The study of using single-screw extruder for full-fat soybean ur processing
| Autor: | Chen Li Whang, 陳立煌 |
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| Rok vydání: | 1995 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 83 The full-fat soybean grits was used as the raw material to study the effects of process parameters on extrudates residencee distributions and chemical properies by using single- screw extruder. The process parameters were barrel temperature, screw speed and feed rate. The experiment was a 3×3×3 factorial design. Results indicated that: 1.barrel temperature, screw speed and feed rate were influ-l in mean residence time. Mean residence time was signific-ntly affected by the feed rate. Decreasing the feed rate raisedean residence time. 2. The feed rate had the greatest effect on the vessel dis-ersion number (D/μL), total color differences (△E) and ureasectivity (pH change). Increasing the feed rate raised the vesselispersion number and urease activity, but decreased the totalolor differences. 3. Dreaseing the screw speed and feed rate resulted an inc-in the mean residence time. Due to the results of proteinolubility and protein digestibility, the feed efficiency of theull-fat soybean would raise. 4. The optimum operation conditions of the full-fat soybeansing single -screw extruder were that barrel temperature were70℃ 170℃ 90℃, screw speed was 80.0rpm and feed rate was 12.5r hour. The mean residence time was 137.8 seconds. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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