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目的探究陶瓷膜微滤决明子Cassia Semen水提液影响膜通量(J)和膜污染阻力(R_f)的因素。方法以决明子水提液为研究对象,在单因素试验的基础上,采用正交设计,以R_f和J的综合加权评分为评价指标,优化无机陶瓷膜微滤过程的最佳工艺参数;并对膜微滤过程中4个主要工艺参数与R_f和J的相关性进行分析。结果最佳膜微滤工艺条件:无机陶瓷膜孔径为0.2μm、料液质量浓度50.0 g/L、跨膜压差0.1 MPa、膜面流速3.32 m/s;微滤膜孔径对R_f和J的影响具有显著性。结论工艺条件对决明子水提液膜微滤过程中的J和R_f具有重要的影响;4种工艺参数对膜微滤过程R_f与J的影响主次顺序为膜孔径>跨膜压差>料液质量浓度>膜面流速。
Objective To investigate the factors influencing membrane flux (J) and membrane fouling resistance (R_f) of ceramic membrane microfiltration Cassia Semen aqueous extract. Methods The aqueous extract of Cassia seed was taken as the research object. On the basis of single factor experiment, orthogonal design was used to evaluate the optimum technological parameters of microfiltration process of inorganic ceramic membrane with comprehensive weighted score of R_f and J as evaluation index. Four main process parameters of membrane microfiltration process were analyzed with the correlation between Rf and J. Results The optimal conditions of membrane microfiltration were as follows: the pore size of inorganic ceramic membrane was 0.2μm, the mass concentration of feedstock was 50.0 g / L, the transmembrane pressure was 0.1 MPa and the membrane velocity was 3.32 m / s. The impact is significant. Conclusion The technological conditions have an important influence on the J and R_f in the microfiltration process of aqueous extract of Cassia seed. The effects of four technological parameters on the membrane microfiltration process R_f and J are the order of the membrane pore diameter, the transmembrane pressure difference, Mass concentration> membrane velocity.