Establishment Of Database About Membrane Fouling Of Water Extract Of Chinese Herbs And Correlation Analysis

Beginning with the application process of inorganic membrane,according to the key technical issue for membrane fouling of inorganic ceramic membrane separation technology in Chinese medicine industry,116 typical and representative water extract of Chinese herbs are selected as research objects,through collecting ten thousands of experimental data about four common polymer material,physical-chemical parameters and membrane process parameters pre-and post membrane separation,establishing basic database on membrane fouling of water extract of Chinese herbs,analyzing the correlation between four common polymer material and physical-chemical parameters and membrane fouling through data of database,mining the key factor of membrane fouling,and providing scientific basis for the research of key technologies to control membrane fouling.The paper is divided into the following five sections:1.Study on the distribution of resistance and membrane fouling in the process of membrane separation of water extract of Chinese herbsStudy on relevance between distribution of resistance and degree of membrane fouling and membrane flux.We find:Surface deposited resistance,blockage resistance and degree of membrane fouling are positively correlated,while have a negative correlation between membrane itself resistance,concentration polarization resistance and degree of membrane fouling.Membrane flux is inversely related to degree of membrane fouling.Blockage resistance and surface deposited resistance are the main resistance,surface deposited resistance is the most influential resistance on membrane fouling.2.Study on common polymer material of water extract of Chinese herbs pre-and post membrane separationTo find variation of common polymer material of water extract of Chinese herbs pre-and post membrane separation by qualitative and quantitative analysis.The results show that there are significant positive correlation between original solution and filtrate and retention solution in starch content,protein content,tannin content and solid content.Pectin content of original solution is significantly related with the content of retention solution,while not related with the content of filtrate.The removal rate of pectin is high,mainly concentrated in 75～100%,and the removal rate of solid,is relatively low,mainly concentrated in 25～50%,the removal rate of starch,protein,tannin have wide ranges.3.Study physical-chemical parameters of water extract of Chinese herbs pre-and post membrane separationInvestigated pH,turbidity,viscosity,conductivity of water extract of Chinese herbs pre-and post membrane separation by various detection means for physical and chemical,To look for the variation of physical-chemical parameters.Results are as follows:①pH of water extract of Chinese herbs all show weak acid except for qing huo zhi mai tablet,pH of different water extract of Chinese herbs show some differences,pH changed little pre-and post membrane separation.②There is great difference in turbidity between different water extract of Chinese herbs. The turbidity of filtrate become smaller,change rate of the turbidity is over 90%.The turbidity of original solution is significantly related with the turbidity of retention solution,while no obviously related with the turbidity of filtrate and change rate of turbidity.The turbidity of retention solution is increased.③After micro-filtration by inorganic ceramic membrane,decreasing the viscosity of filtrate, increasing the viscosity of retention solution,the viscosity of filtrate is more similar,but the viscosity of retention solution showed a greater difference.For all water extract of Chinese herbs,the viscosity of original solution is significantly highly positively related with the viscosity of retention solution,significantly moderately related with the viscosity of filtrate and change rate of viscosity.④Conductivity of water extract of Chinese herbs all showed slightly downtrend, conductivity has a little change after membrane separation.There are significant high positive correlation between original solution and filtrate and retention solution in conductivity, correlation coefficients is greater than 0.9,the conductivity of different parts of medicinal herbs vary greatly.4.Establish basic database on membrane fouling of water extract of Chinese herbsWater extract of Chinese herbs,complex system,are selected as research objects,collecting ten thousands of experimental data about common polymer,physical-chemical parameters, membrane process parameters pre-and post membrane separation,with a powerful tool Microsoft SQL2000 database built basic database of membrane fouling of water extract of Chinese herbs by inorganic ceramic membrane separation technology,and develop information management system about membrane fouling by PowerBuilder9.0,it can be realized data to add, delete,enquiries,sort,and statistics,management functions.5.Relevance Research between membrane process parameters and physical-chemical parameters and composition of common polymer.By correlation and cluster analysis,study on the relation of common polymer chemical composition,physical-chemical parameters and membrane process parameters of water extract of the Chinese herbs,to identify the key influencing factor of environmental on membrane fouling,as well as the relevance of resistance distribution and degree of membrane fouling of water extract of Chinese herbs.The results show that viscosity has a positive correlation with surface deposited resistance,blockage resistance and degree of membrane fouling,viscosity is the key influential factor on membrane fouling.In this paper,we preliminary studied the relation of four common polymer material, physical-chemical parameters and membrane process parameters pre-and post membrane separation,the innovation is:(1) establishing basic database on membrane fouling of water extract of Chinese herbs.(2) analyzing variation of four common polymer material,physical -chemical parameters pre-and post membrane separation.(3) using correlation and cluster analysis techniques,mining the correlation between common polymer material, physical-chemical parameters and membrane process parameters,exploring membrane fouling mechanism of refining water extract of Chinese herbs.