Study On Key Techniques Of Deep Processing Of Flaxseed

Flaxseed meal is the residue after taking the oil by solvent extraction or mechanical pressfrom flaxseed, which contains large amounts of flaxseed gum, flaxseed protein, lignans andother functional ingredients. However, flaxseed meal is mainly used as animal feed or aswaste treatment currently, which not only caused the irrational use of resources and waste,and the potential value of flaxseed is far from being exploited. In this paper, defatted flaxseedmeal was used as raw material, respectively, enzymatic method was used to remove flaxseedgum, response surface methodology was used to extract flaxseed protein, Flaxseed oil andperilla seed oil were microencapsulated by spray drying method using flaxseed gum as wallmaterial.Enzymatic method was used to removal flaxseed gum from flaxseed. The influences ofdifferent enzymes, enzymatic hydrolysis temperature, time, pH, the amounts of enzyme, ratioof material to liquid on the removal of flaxseed gum were studied. On the basis of singlefactor test and orthogonal experiment, it has been found that the optimum condition forenzymatic hydrolysis of removal flaxseed was: pectinase as enzyme preparation, temperaturewas55℃, time was4h, pH was3.5, amounts of the enzyme was100.0u/g and the ratio ofmaterial to liquid was1:6, then could removaled the flaxseed gum9.53g.Based on singer factor test, response surface method was used to study effects ofextraction temperature, extraction pH, extraction time and solid-liquid ratio on extraction rateof flaxseed protein, and a second order quadratic equation for flaxseed protein extraction wasfinally obtained. The results showed that the model was of great difference, and the extractionof flaxseed protein from flaxseed was analyzed and predicted by the model. The optimumextraction of flaxseed protein from flaxseed were solid/liquid ratio(g/mL)1:20, extraction time90min, extraction temperature50℃, extraction pH10.0, the extraction rate of flaxseedprotein from flaxseed was79.26%and purity reached92.34%under the optimal conditions.Flaxseed oil was microencapsulated by spray drying method using flaxseed gum as wallmaterial. Orthogonal array design was employed to optimize the microencapsulationconditions based on microencapsulation efficiency and flaxseed oil content. The optimumspray drying conditions were found to be170℃,70℃,24000r/min and50.41mL/min forinlet air temperature, outlet air temperature, rotation speed of centrifugal atomizer and feeding rate, respectively. The optimum wall/core material ratio for flaxseed oil microencapsules was2:3(m/m). Under these conditions, a microencapsulation efficiency of95.32%and a flaxseedoil content of59.48%were obtained.The microencapsulation of perilla seed oil was prepared with the spray drying methodusing perilla seed oil as core material and flaxseed gum as wall material. The effect factors ofpreparing perilla seed oil microcapsule had been investigated in detail according tomicroencapsulation efficiency and the ratio of oil content. The results showed that the optimalspray drying processing conditions were determined as follows: the wall material and corematerial ratio of2:3(m/m), the air temperature at the exit was80℃, and at theinlet was180℃,liquid feed rate was45.56mL/min, and the rotating speed of centrifugal atomizer was24000r/min. The content of microencapsulation efficiency was92.36%and the ratio of oilcontent was55.45%.