| Creature feeding microcapsule oil powders were prepared with refined food waste oil and dextrin.The technology included the optimization of refined Food waste oil and the analysis of oil samples, the powders' elementary physical and chemical characters were studied, meanwhile the safety was studied by acute peros animal toxicity experiment.The results were showed as following:In the degumming technology of food waste oil,the influence of different inorganic acid on the degumming oil yield was: phosphoric acid+ethanedioic acid+citric acid (w:w:w=1:1:1) >phosphoric acid>citric acid>ethanedioic acid; The optimal conditions were: phosphoric acid0.10%(v:v), reaction temperature55℃, reaction time 35min,water addition 2%;with these parameters, degumming oil yield was 90.22%, the gum was beige, transparent and easy to separate.In the alkali refining technology of Food waste oil, the effect of demulsification by NaCl was better than by Na3PO4, Na2HPO4 and NaH2PO4; according to Box-Benhnken designing and the results of mon-factor experiment, a regression mathematical model was established with the parameters of excess alkali quantity X1, temperature of alkali refining X2 and alkali concentration X3, which had influence on the alkali refining oil yield(Y) .The results were:Y=-79.39800-19.12750X1+1.66900X2+12.13088X3+143.10 000X12-0.01734X22-0.38400X32+1.651500X1X2-1.75000X1X3+0.027750X2X3Analysis showed that the optimal parameters were: excess alkali quantity 0.33%, temperature of alkali refining 74.81℃, alkali concentration 17.58°Be.The theory value of Y was 87.98%, this mathematical model had significant regression (P<0.0001), lack-of-fit tests did not result in a significant F-value, determination coefficients (R2) was 0.9692, Radj was 0.9193 .The results showed that this model had significant in practical and linear relationship between independent and response value.By L9(34) Orthogonal Design Test, the optimal parameters of decoloring technique were: temperature 65℃, activated clay quantity 4.0%(w:w), reaction time 35min, stirring speed 50 r/min. Three validation tests showed that the decolorization efficiency was 84.98%, oil yield was 84.58% and the effect of decolorization was significant. In the deodorization technology of food waste oil, selecting the parameters of the vacuum degree X1, reaction temperature X2 and deodorization time X3, a three factor, 3 levels Box-Behnken experiment design was used to optimize the experiment conditions, which took general comment of deodorization Y as response value. The results were:Y=-30.17000-6.60000X1+0.29238X2-0.28875X3-2.00000X12-6.25000E-4X22-0.0 57500X32+0.022500X1X2+0.27500X1X3+0.00300X2X3Analysis showed that the optimal parameters were: 0.53KPa, deodorization temperature 256℃, reaction time 5.6h. In these conditions, the general comment of deodorization Y was 4.77, and the noise to predictive value was 1.35%, the effect of deodorization was significant.Many indexs of refined food waste oil, had reached the hygienic standard for edible oil, its' AV and carbonyl value were greatly reduced, but the POV changed little, deodorized oil's I.V was similar with the value of the hygienic standard for edible oil. Water and vapor content,specific gravity and refractive index of the refined oil 4 were 0.20%, 0.9171, and1.4698 respectively.The conductivity can be greatly reduced after refining,but it's higher than the value of edible oil ,and there was a certain gap between them in color.Chromatography displayed that Food waste oil had seriously tailing phenomenon while Rf is (3.9cm, but when Rf is (0.2cm, all the other oil samples had tailing phenomenon except 100% Jinglongyu com oil and refined oil 4.Crude food waste oil contained many organics of Aldehyde and Ketone, which would be produced during degumming and decolorizing, and make the PC% fluctuate. The PC% would be reduced as the degree deepen of refining, which removed the water, phospholipids, Aldehyde, Ketone and pigment, relatively, improved the percent of triglyceride.The contents of MUFA,PUFA and SEA in Crude food waste oil were 49.08%,33.979% and 16.941% respectively ,free radicals were quite active due to high temperature, fatty acids' structure were easy to change into TEAS, as a result, the percentage of TEAS with the total fatty acids is 6.195%.There was no Acrylamide in the Crude food waste oil and refined oil 4.The high content of Fe,Zn in the Crude food waste oil would make the oil oxidation easy,but the microelement's content could be reduced effectively after refining.Compared with JinlongYu edible corn oil, the exceed standard of content of Zn,Cu was relatively serious.The results of acute peros toxicity experiment showed that: for two kinds of sexmouse, TMD of edible vegetable oil, Crude food waste oil and refined oil 4 were more than 20 mL/KgBW. According to LD50, they were all asepsis. When preparing waste oil microcapsule powders, emulsionize homogenous pressure for emulsification was 40 MPa; the optimal parameters of spray drying were: inlet temperature 190℃, outlet temperature 92℃, feeding rate 24.5ml/min and atomizing pressure 0.10MPa. Production had good solubility and dissolubility, longer shelf-life, but it was easier to been oxidized when storage temperature higher. It was indicated by Water Soluble Microcapsule Feed Oil's production and product property to study that the breeding result and digestive energy of butterfat powder A and powder B were high, especially of powder A. On the one hand, it was because that apparent digestive energy and energy utilization efficiency of the powders were high; on the other hand, the powder A was added with oligosaccharide, which was used as probiotics in animal production. It could elevate digestive energy and organism's immunity when added butterfat powder A to diets.
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