干法超微粉碎荸荠皮

Ultra-fine pulverization on eleocharis tuberose peel by dry-processing

为使废弃荸荠皮得到充分利用,采用振动磨对其进行干法超微粉碎处理。考察了原料水分含量、粉碎温度和粉碎时间等因素对超微粉粒径和总黄酮含量的影响。结果表明,干法超微粉碎能在20min内将荸荠皮粗粉的平均粒径从351.747μm降至20μm以下,粒径分布变得均匀。粉碎20min后随着"团聚"现象产生,颗粒的平均粒径开始逐渐增大。原料水分含量越高,超微粉平均粒径越大。在-20、-10、0、10℃下粉碎30min得到的超微粉总黄酮含量分别为1.469%、1.385%、1.361%和1.205%。粉碎时间越长,荸荠皮黄酮类物质损失越大。

Eleocharis tuberose peel was treated by ultra-fine pulverization with dry-processing via vibrating mill aiming to make full use of it.The impact of material moisture,smash temperature and smash time on powder size and flavonoids content were investigated.The results showed that the average powder size of eleocharis tuberose peel was able to decrease from 351.747μm to 20μm below by dry-processing ultra-fine pulverization in 20minutes,and at the same time,the powder size appeared to uniform.Reunion emerged after 20minutes of smash,and the average size of the ultra-fine began to increase.High moisture rate of the material led to larger-size of the powder.Flavonids content of the ultra-fine witch processed under-20,-10,0,10℃ were 1.469%,1.385%,1.361% and 1.205%.Longer smash time would lead to more flavonoids loss.