Processing process and post processing method of phytase

LIMA Fish Feed Machine,Chicken Feed Machine

1. Phytase processing technology
Phytase is an enzyme preparation obtained by using bioengineering technology to obtain genetically engineered bacteria and using a special fermentation process. This production technology was introduced from abroad in the 1980s, and the product was only produced in the mid-1990s. At prnt, do tic production enterprises only More than ten. The processing technology is: fermentation broth-flow metering-computer-controlled steam carrier micro-grinding-lifting-high-humidity material mixing-stepless conveying-drying-cooling-finished product mixing-automatic metering-packaging seam A24 phytase is a beverage additive, It can effectively decompose phytic acid in feed to release inorganic phosphorus, improve the utilization rate of phytate phosphorus in beverages, reduce phosphorus discharge and protect the environment. In addition, it can improve the utilization rate of mineral eleme and protein digestibility of animals. Because the role of phytase in livestock and poultry breeding is very obvious. Enzyme preparations are added to almost all full-price beverages in the United States, Finland, Sweden and other countries. In 1999, my country’s beverage output reached 68.71 million tons, ranking second in the world, of which 5,552 tons of full-price blended beverages were added. According to the current ratio of 0.1% of phytase in the full-price material, 3,000 tons of phytase can only add 300 tons of phytase. The utilization rate of 10,000 tons of full-price compound feed in the full-price feed is only 5.4%, so the market prospect is very impressive. For the phytase processing equipment with an hourly output of 400kg, the main workshop covers an area of ??20¡Á10 (M2), and the equipment cost is about 3.1 million yuan, and the total installed capacity is about 130kw; the sales price of phytase is 9,000 yuan/ton, and the annual profit is 324 10,000 yuan, the equipment investment payback period is 0.95 years.
2. Post-processing of phytase
In recent years, phytase has been widely used in feed. In the production technology of phytase, the do tic phytase production and fermentation enzyme activity has reached the international advanced level, and some even far exceed foreign countries; as a post-processing technology, do tic phytase manufacturers have also achieved remarkable results. improve.
At prnt, the post-processing methods of phytase in China mainly include adsorption drying, spray drying, granulation and coating. Adsorption drying is the earliest production method of phytase in China. At that time, the do tic phytase industry had just started, and the fermentation enzyme activity was still at a relatively low level. The production of low enzyme activity products by adsorption drying was the most economical production method, and it was also the main production of current low enzyme activity products. Way. Adsorption drying is to mix the fermentation broth and corncob flour in a certain proportion, and use a two-step air drying method. The first step uses hot air at 130¡ãC for 10 seconds drying; the second step uses 60¡ãC-80¡ãC air for 10 seconds drying. This not only ensures the rapid dehydration of phytase, but also ensures that the loss of enzyme activity is low. Adsorption of dry products is greatly affected by fermentation enzyme activity and carrier. Quality control must be done to ensure the moisture, particle size and color of the carrier. The products produced by the adsorption drying method have low cost, but the molecules of phytase are in direct contact with the outside world, and the storage time in the feed is not as long as that of the pelleted and coated phytase. Places with better temperature and humidity environment for feed prrvation. Spray drying is currently the main production of high enzymatic products in ChinaWay. For example, 2500U / g, 5000 u / g of the product, the production method is to mix the fermentation liquid and the carrier in a certain proportion of paste paste, through the nozzle, dispersed into small droplets at a certain pressure. Th droplets are instantly dehydrated in the hot air air flow to form a granular product. Because it is an instant dehydration, the enzymatic loss is less. At the same time, by adjusting the ratio of the fermentation liquid and the carrier, the phytase product of different concentrated ratios can be produced. The product produced by spray drying, should belong to the second generation of products in China. It has the advantages of aesthetically pleasing appearance, good flow, and high enzyme activity. In the feed, a larger formulation space can be produced. The disadvantage is that during the production process, the particle size is not easy to control, and there is a certain dust during use. At the same time, similar to the adsorbed product is similar, the phytase molecules are directly in contact with the outside, and there is a certain problem in the feed of other ingredie in the feed. With the promotion of do tic phytase technology, do tic enterprises have successfully produced pelletases and coated dosage forms. The advent of micellers and coated phytases marked with the post-processing process of do tic phytase reached the international advanced level. The micelle-type phytase is mixed with a substantially proportion of the treated fermentation liquid and the carrier to obtain a product after drying. It is equivalent to enclosing the phytase molecules in a plurality of cells, isolating the contact of the molecule and the outside, more advantageous for the prrvation of phytase. Since the product particle size distribution and number of particles are guaranteed, the phytase is also easier to distribute even in the feed. There is no longer a problem with dust during use. The key to micelle-type phytase technology is the selection and drying method of the carrier. The selection of the carrier first requires the particles that require a certain hardness, and the particles can quickly disintegrate, release the phytase molecules in water, and functions. Second, the selected carrier must guarantee stability in the feed. After ensuring mixing feed, it will not interact with the feed, affecting the stability of phytase. Finally, because the carrier has an effect on the enzyme activity, the determination of the carrier needs to pass a lot of calculations and tests to obtain the correct results. The evaluation index of the quality of the micelle type phytase, including the number of particles and particle size distribution of unit weight. The number of particles of the unit weight indicates the distribution capability of the pellet in the feed. If the number of particles is small, it is difficult to ensure that the distribution is uniform after adding feed. The more particles, the greater the opportunity of various partial distribution in the feed, can ensure that the phytase is evenly distributed in the feed, in order to ensure the animal’s feeding effect. The particle size distribution shows the uniformity of the product particle size. The more the particle size is concentrated, the more uniform particle size of the product is mixed, and when mixed into the feed, it can better ensure the distribution of phytase in the feed. The coating is a coated product after molding, forming a solid and soluble film on the surface, isolating the phytase particles with the outside air and moisture. More beneficial to the stability of phytase, high temperature resistance levels also have a certain increase, wide range of use. The coating agent is divided into two categories of water soluble and lipid. It is best to use a water-soluble coating agent to ensure rapid dissolution in the digestive tract, and the phytase is released. Such as lipolytic coating age, ratioSuch as various types of fat or stearate, on the one hand, the effect of fatty enzyme can be released in a large amount; on the other hand, fat or stearate is easily oxidized in the feed, affecting the residence of the phytase.The coating process must form a strong film on the surface, with moisture-proof, isolated air, this is to make specific requireme for the time and process of the coating.For the evaluation of the quality of the coated phytase product, the number of units of weight particles and particle size distribution are similar to particulate phytase, whether the microscope mirror is required.

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