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果糖結晶工藝的優(yōu)
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on the Crystallization of Fructose
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    針對國內結晶果糖生產中存在的問題,對果糖結晶工藝進行改進,,并優(yōu)化工藝參數(shù),。研究發(fā)現(xiàn),向高果糖漿中加入表面活性劑Span 60,,可使結晶果糖的變異系數(shù)降低51.5%,,提高果糖晶體均勻性;在進行結晶前,,用高效糖化酶降解低聚糖,,可將果糖漿粘度降低26.2%。酶解最佳工藝條件為:酶解時間20h,,強效糖化酶用量為600mg/kg,,pH值4.0,酶解溫度55℃,。優(yōu)化的果糖結晶工藝條件為:晶種添加量為2%,,初始過飽和度為1.02~1.08,添加乙醇前的降溫速率為0..4℃/h,;乙醇添加量為0.2,,Span 60用量為100mg/kg。添加乙醇后降溫速率:52~46℃為0.28℃/h,,46~43℃為0.55℃/h,,43~35℃為0.80℃/h,35~25℃為0.90℃/h,。在優(yōu)化條件下,,最終提糖率為56.92%,結晶果糖平均粒徑為

    Abstract:

    221.9μm,。 The improvement of the crystalline technique of fructose was reported. The effect of sucrose ester S-570 and surfactant Span 60 on crystals was studied, and the results show that the CV of crystals can be reduced by 51.5% when adding 100mg/kg Span 60. The optimal glucoamylase is utilized to hydrolyze oligosaccharides in fructose syrup, under the optimal conditions: enzymes/oligosaccharides 600mg/kg and hydrolysis time 20h, pH value 4.0, reaction temperature 55℃, fructose syrup concentration 60%. The optimized cooling-crystallization conditions are as follows, seeds amount 2%, initial supersaturation degree 1.02~1.08, cooling rate before adding ethanol 0.4℃/h, ethanol concentration 0.2, cooling rate after adding ethanol: 0.28℃/h (52~46℃), 0.55℃/h (46~43℃), 0.80℃/h (43~35℃), 0.90℃/h (35~25℃). With the optimized parameters, the final product yield is 56.92%, and the mean size is 221.9μm.

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閆序東,楊瑞金,華霄,張文斌.果糖結晶工藝的優(yōu)[J].農業(yè)機械學報,2009,40(9):155-160. on the Crystallization of Fructose[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(9):155-160.

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