响应面法优化DSA电极反应脱色混合汁的工艺条件

Optimization of electrolytic decolourization of the mixed juice with the electrode of DSA by response surface methodology

以糖厂混合汁为原料,以脱色率为评价指标,在单因素实验的基础上,根据Box-Benhnken的中心组合实验设计原理,采用对主要因素电解电压、电解时间、电解液初始pH值的3因素3水平的响应面分析法,对电解脱色混合汁的条件进行优化。结果表明,电解脱色混合汁的最佳工艺条件为电压16 V,电解时间38 min,初始pH6.9,电极间距1 cm时,混合汁脱色率为48%。

Base on single factor experiment which the mixed juice from the sugar refinery was raw material and ratio of electrolytic decolourization was evaluation indexes.The factors affected decolourization at different stages were declared by response surface methodology with three factors and three levels according to Box-Benhnken theory for center united experiments.The results showed that the optimal conditions for electrolytic decolourization were： voltage 16 V,electrolysis time 38 min,pH6.9,polar distance 1 cm.Under these conditions,the ratio of electrolytic decolourization for the mixed juice was 48%.