制糖脱钙树脂再生工艺的响应面法优化

脱色树脂再生废液中色素能促进制糖脱钙树脂的再生。在单因素和响应面实验基础上,本文探讨了含美拉德色素的Na Cl再生剂对制糖脱钙树脂的再生工艺。选择树脂高径比、再生温度和流速3个因素,应用Box-Behnken中心组合法进行3因素3水平实验设计,以再生率为响应值进行响应面分析。结果表明:优化的再生温度为73℃,高径比8.7∶1和流速2 BV/h,此时制糖脱钙树脂的再生率可高达93.89%±0.65%,与RSA预测值94.68%之间的RSD为0.60%;周期性实验结果表明,树脂循环使用8个周期后吸附和再生能力分别保留在84%和89%以上。 

Optimization of the regeneration process of decalcification resins in sugar industry by response surface method

Pigments in the regeneration wastewater of decolorization resins can promote the regeneration of sugar decalcification resins.On the basis of single factor and response surface experiments, the regeneration process of decalcifying resins in sugar industry was researched using regenerant containing Maillard pigments and Na Cl. Three factors, like the ratio of height to diameter for resin bed, regeneration temperature and flow rate, were selected in the singular factor experiment, and the BoxBehnken method was chosen to carry out the response surface experiment using three levels of the three factors. Response surface analysis (RSA) was performed using the regeneration rate as the response value. Results showed that the optimized parameters were as follows-regeneration temperature of 73 ℃, the ratio of height to diameter at 8.7 ∶ 1 and the flow rate of2 BV/h. The regenerated rate of decalcifying resins was 93.89% ± 0.65%.The relative standard difference (RSD) between the predictive value of 94.68% from the RSA and the experimental value was 0.60%.The results of periodical experiments showed that, the adsorption capacity and the regeneration capacity of resins were greater than 84% and 89% respectively after 8adsorption-elution cycles.