Advantages of ultrafiltration membrane separation equipment for the preparation of phytase

　　Phytic acid, or inositol hexaphosphate, acts as a repository of phosphoric acid and is widely present in plants. Since minerals are bound to protein-phytic acid-mineral complexes, the nutritional titer of minerals in some plant foods and some plant protein isolates is reduced. China is a big country, in recent years the breeding industry booming, with people's understanding of phytase continues to deepen, in the pig and poultry feed formula to add phytase will become a development trend.

　　Phytase is a general term for a class of enzymes that catalyze phytic acid and phytate hydrolysis into inositol and phosphoric acid, including phytase and acid phosphatase, phytase can only decompose phytic acid into inositol phosphate, can not completely decompose phytic acid into inositol and phosphoric acid, acid phosphatase can completely decompose inositol phosphate into inositol and phosphoric acid, reduce the content of phosphorus in animal feces, and reduce environmental pollution. A large amount of phosphorus is excreted in animal feces, resulting in pollution of soil and water sources, which will cause eutrophication of water quality, and the amount of phosphorus excreted in feces can be reduced by 60% after the use of phytase.

　　Phytase is added to the feed as a feed enzyme and can effectively decompose the phytic acid in the feed. On the one hand, it greatly improves the nutritional value of feed, on the other hand, it can make effective use of the phosphorus source in phytic acid, reduce the amount of high-priced inorganic phosphorus added in the feed, reduce feed costs, and greatly reduce the phosphorus pollution in livestock manure emissions and have obvious weight gain effects on pigs and poultry.

　　In the 1990s, the first generation of phytase produced by microbial fermentation method was successively developed at home and abroad, and significant economic benefits have been achieved in China: the aquaculture industry has reduced the use of dibasic calcium phosphate by 800,000-1.2 million tons per year, and the phosphorus emitted by the aquaculture industry can be reduced by more than 30%, and the nitrogen can be reduced by more than 10%.

　　After the completion of the phytase fermentation liquid, the fermentation liquid contains a large amount of water, in order to separate and extract the phytase and the bacterium from the fermentation liquid and concentrate, the modern membrane separation technology is used to filter the fermentation liquid, concentrate the bacteria and phytase in the fermentation liquid, remove the water, the concentration of the concentrate of the bacteria and phytase is greatly improved, and then enter the spray drying tower to dry and make a product.

　　Compared with the previous process, the membrane filtration technology used in the new process can be carried out at room temperature and can effectively intercept phytase, which is beneficial to the heat-sensitive product phytase and can improve the product yield; At the same time, after the fermentation broth is filtered through the membrane, the concentration is greatly improved, reducing the operating costs of subsequent spray dryers.

　　In the membrane concentration experiment of phytase fermentation liquid, the ultrafiltration membrane separation equipment has good interception of phytase, the stability of membrane flux, and the recovery of membrane. After the concentration of phytase fermentation broth, the concentration is increased by 4-5 times, which creates favorable conditions for the next step of spray drying process, which can effectively protect the activity of phytase from being destroyed, and also greatly reduce production and operating costs, improve product quality and yield.

　　Ultrafiltration membrane separation equipment can be used to concentrate other enzyme substances, such as cellulase, glycosylase and other enzyme preparations. Delamele Membrane Separation is committed to the promotion of membrane separation and desalination concentration technology and the development of process equipment. Through years of efforts, has a wealth of engineering experience, to provide customers with a series of services from the process design of small test, pilot, industrial equipment to equipment production, installation and commissioning, etc., and successfully applied to metallurgy, environmental protection, pharmaceutical, chemical, food and other fields, has won a good reputation from customers and the industry.

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