A Study Of A New Process For Preparing Cu(Ⅱ)-compound Amino Acid From Feather By Microwave

China is the world's largest agricultural waste output country, however, only small portion is well utilized. Most waste is disposed or discharge into the environment, resulting in "pollution sources" instead of "useful resources", and also imposes great impact on the ecological environment. Animal feathers, hoof angle contain abundant protein, its hydrolysate contain great amount of free amino acids. If these abandoned protein resources can be used for the production of amino acid fertilizer, the cost of production will be greatly reduced and also alleviate the pollution load to the environment.Currently, the major methods for synthesizing amino acid compound from feathers hydrolysis are: basic hydrolysis, enzymatic hydrolysis, high temperature and high pressure hydrolysis and acid hydrolysis, which is most widely used. However, these methods have their disadvantages, such as the low yield of compound amino acid, long time for extraction processes, the secondary pollution from the extraction processes. In this study, a keratin hydrolysis process using microwave was tested from a new perspective. The experimental data showed that the hydrolysis reaction time can be shorten by microwave extraction. Sulfuric acid and potassium hydroxide were used as the hydrolysis media. The optimum conditions of the acid hydrolysis were: solid-liquid ratio of 1:10, sulfuric acid concentration of 3 mol / L, hydrolysis time of 3 h, the required microwave power of 360 W; the best conditions of alkaline hydrolysis: the solid-liquid ratio of 1:10, potassium hydroxide concentration of 6 mol/L, hydrolysis time of 4 h, the required microwave power of 360 W. The composite amino acids were finally synthesized by neutralizing the two product after filter. Compared with the traditional method, such processes reduce the wastewater from acid hydrolysis, maximizing the use of the resources and reducing secondary pollution.Mineral-amino acid chelates, as the third generation of feed additives, play an important role in animal nutrition and fertilizer plants. It can enhance the producing ability of animal husbandry, and also conducive to animal health immunization and protection of ecological environment. Though it has wide applications, the practical applications are limited due to the high cost. Using amino acid compounds as raw materials for amino acid chelates, it can reduce the cost of production and also recycle the animal organic waste. In this study, using Cu(II)-compound amino acid for an example, we focused on the main factors affecting the production processes of chelates, the results showing that the best conditions were: the materials ratio of 1:2, the pH of 6, the reaction temperature of 60°C and the reaction time of 80 min.In order to achieve the maximum use of resources, the residues in the extraction of amino acid was fermented in the solid-state to produce microbial fertilizer. The biological activity of the residues was also conducted by cutting of mung bean experiment and the results showed that they could significantly increase the adventitious root growth of mung bean, the length and biomass, even without other nutrition additions.