Studies On The Processing Technology Of The Walnut Milk

The optimum processing technology of walnut milk with xinjing walnut was studied.The nutritional components of walnut were determined ,the optimal conditions, including peeling , extraction of walnut oil by aqueous enzymatic, the milling,dilution times of walnut milk, the usage of emulsifying agents and stabilizing agents, formula of walnut milk and jujube-walnut milk, the usage of homolysis, the sterilization condition of walnut milk were studied.The indexes which were protein,soluble solid content, microorganism indexes were determined, and sensory evaluation were tested.The flavor material of walnut milk were tested through using HPLC and CS-MS.The results were as follows: The optimal conditions for peeling : the mixed solution of 4%Na2CO3 and 10%Ca(OH)2 for 3 min at 100℃. For milling: liquid-material ratio 8:1, temperature 60℃,, time 3hrs, the dosage of NaHCO3 0.6%, the yield of soluble proteins is as high as 39.01%.For extraction oil: complex enzyme which are the combination of pectinase, cellulase and neutral protease,the ratio of solid and liquid 1:5(g/g), enzymolysis pH 7.5, enzyme amount 1.5%, digestion temperature 45℃,enzymolysis time 2h. The extracti on rate of walnut oil can reached up to 54.2% .The optimal conditions for dilute times of walnut milk was above 35 , soluble protein content was above 0.5%.The optimal conditions for emulsifye agents and stabilize agents : the ratio of monoglyceride to sucrose ester 7:3(g/g),sodium alginate 0.2%,xanthan gum 0.15%,pectin esterase 0.15%.The optimal conditions formula of non-fat walnut milk for the ratio of material to water 1:20, sugar 8%,citric acid 0.1%,walnut essence 0.1%,baked walnut 10%.The optimal formula of jujube walnut milk: the walnut to water 1:15,the jujube to water 1:10, sugar 10%, ethyl maltol 0.04%.The optimal conditions of homolysis: pressure 20MPa, 60℃, 2 times.For sterilization 75℃,15minutes.According to GC-MS combination with information from computer database, 17 kinds of compounds from the walnut milk. 21 kinds of compounds from the walnut milk with roasting.the 26 kinds of compounds from the jujubes walnut milk were determined...