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| Influence factors of degossypolization effect of cottonseed meal |
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| DOI： |
| KeyWord:cottonseed meal gossypol degossypollization effect solid-liquid ratio |
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| Abstract: |
| In order to reduce the content of free gossypol in cottonseed meal, the effects of solvent extraction degossypolization parameters, degossypolization methods (extruding pretreatment method, solvent extraction method), raw material origin and storage time on the degossypolization effect of cottonseed meal were studied in laboratory and workshop. The results showed that in industrial production, the degossypolization effect of cottonseed meal was better under the conditions of 25%-28% powder and 3.5%-4.5% moisture content of cottonseed flake, 85%-90% volume fraction of methanol, 55 ℃ degossypolization temperature, and ratio of material mass to solvent volume of fresh methanol 1∶ (0.5-0.6). The degossypolization effect of solvent extraction method was better than that of extruding pretreatment method. For the origin of cottonseed, the removal degree of gossypol was decreased in the order of North Xinjiang > South Xinjiang > Hebei, which was opposite to the crude fat acid value of cottonseed. The longer the storage time of cottonseed, the more difficult it was to remove gossypol. Therefore, cottonseed meal with lower free gossypol content can be obtained by selecting fresh cottonseed raw materials with low crude fat acid value and strictly controlling the process parameters of solvent extraction degossypolization. |
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