喷雾干燥毕业论文

The 21st century, mankind is faced with a more severe population growth, lack of important resources and environmental pollution pressures and challenges, and open up new resources, the path of sustainable development is the development of agricultural industrialization in China the only way. Insects as the largest on earth has not been fully utilized the resources of the treasure-house and has drawn greater attention. Insect protein resource development and industrialization, will enter the high-tech, high-yield characterized by multi-level, comprehensive utilization stage. Insect-rich protein, unsaturated fatty acids, trace elements, is a senior human nutrition source. Tenebrio molitor protein contains 18 kinds of amino acids, and essential to the human body contains eight kinds of amino acids, amino acid content accounted for 40% of the total, the ratio closer to the model of the human amino acid requirements, but also contains a variety of minerals, vitamins and trace elements, known as the "treasure house of animal nutrition." Tenebrio study abroad to improve the human immune system protein, anti-fatigue, anti-aging, reducing blood lipids and promote cholesterol metabolism. In this paper, supercritical CO2 extraction technology of oil extraction Preparation of Tenebrio molitor Tenebrio molitor powder skim the optimum conditions were studied in order to get the Tenebrio molitor protein powder as raw material, the use of base formulation and enzyme formulations for proteins of Tenebrio molitor Extraction of the extraction process of these two comparative studies. Tenebrio first preparation of crude protein to Defatted powder, supercritical CO2 extraction technology to skim handling of Tenebrio molitor, Tenebrio molitor in the oil extraction rate as an index, a three-factor three-level orthogonal experimental design to determine Tenebrio supercritical CO2 extraction of oil The optimum conditions are as follows: extraction temperature 45 ℃, the pressure of 25MPa, the time 180min. Tenebrio oil extraction rate of . Alkaline extraction with high extraction rate, the characteristics of low-cost, single-factor experiments and orthogonal test results show that the best conditions for alkali formulation as follows: alkali concentration of mol / L, at 70 ℃, liquid-solid ratio 12:1 Tenebrio protein extraction conditions for 90min, in the extraction conditions, Tenebrio molitor protein extraction rate can reach , purity. Enzymatic extraction with mild reaction conditions and substrate specificity of the characteristics of a good. Tenebrio different protease extract the role of protein have different approaches to protein extraction rate and the quality of protein extract as an index to compare the protease protein of Tenebrio molitor extract the effect of protease and that the complex compound extracted flavourzyme efficient and the final protein good quality extract. To enhance the utilization of raw materials and Tenebrio molitor protein extraction rate, selection of these two enzymes for the enzyme extraction. Using two separate enzyme extraction, step-by-step for the extraction and re-extract the results of cooperation in comparison to the rate of protein extraction as an index for the reference degree of hydrolysis, the use of single factor experiments and orthogonal experiment to determine the Tenebrio protease extracted the most good process for the composite and complex protease flavourzyme to conduct two-enzyme complex extraction: 6% the amount of enzyme protease complex and composite plus flavourzyme than 1:3, liquid-solid ratio 9:1, extraction time 8 hours, pH6. 5 temperature of 55 ℃. Optimum conditions in the extraction of Tenebrio molitor protein, extraction rate can reach , purity. Tenebrio body contains a variety of pigments and polyphenols, of which polyphenols easily in response to Maillard reaction, in the course of enzyme to produce more or less bitter peptide, and in order to maintain its optimum pH value range, the need to join the acid, alkali, resulting in a lot of salt, and the protein extract of Tenebrio molitor darker color, to be refined to deal with Tenebrio molitor protein. 3% by adding activated carbon for decolorization, debittering available color clear extract protein taste good. Through the cation-anion exchange resin can remove of the salt, and finally through the spray-drying the protein to be light yellow powder. Alkali formulation obtained toxicology protein product safety evaluation results show that: protein products derived from the reference base is the basic security of the non-toxic (LD50 in mice is greater than its 120g/Kg), therefore, can be used as high-protein and other animals resources. In short, this paper two methods of protein extraction studies, the initial establishment of the Tenebrio molitor protein extraction methods and the best technology, the development of Tenebrio molitor for the future of protein resources to provide a theoretical basis. Tenebrio molitor; protein; supercritical fluid extraction; alkali; Enzyme; extraction process; amino acid