Producing process of lysine

Abstract

The invention discloses a producing process of lysine, which belongs to the technical field of lysine preparation. The process comprises the following links of saccharifying, fermenting, separating, ion exchanging, concentrating, crystallizing, drying, product packing and the like, wherein the separating and ion exchanging comprise the following steps of: primary separation and reseparation, filtering and resin ion exchange; the steps are specifically as follows: primarily separating the fermented lysine fermenting liquor in a centrifugal machine; accelerating the sedimentation velocity of particles in the liquor; separating and eluting proteins and different precipitates; and then filtering the primarily separated liquor by using an ultrafiltration membrane; and carrying out resin ion exchanging to obtain a side product and separating out of the sewage. According to the invention, compared with the traditional ceramic membrane filtering technology, the membrane filtering link can be used for saving about 60% of sewage and energy consumption; the defect of parking maintenance caused by membrane crack in the ceramic membrane filtering is avoided; simple process, high purity of the prepared product, wide application field, suitability for producing tryptophan, phenylalanine and other amino acids and the like are obtained.

Description

[technical field] [0001] The present invention relates to microorganism industry, more specifically, the present invention produces the technology of lysine through fermentation, and the present invention relates to a kind of production technology of lysine. [Background technique] [0002] Lysine is one of the eight basic amino acids necessary for the human body. Lysine and threonine are the most important amino acids in animal nutrition, because other amino acids can generally be analogs with X-keto or hydroxyl groups or It is replaced by small optical isomers, but lysine is the only one among the eight amino acids that only L-form components can be effectively used. Since lysine cannot be generated by reductive amination or transamination in the human body, It must be ingested from food, so it is one of the most important essential amino acids. [0003] Lysine is a basic essential amino acid. Since the content of lysine in grain food is very low, and it is easily destroy...

AI Technical Summary

Problems solved by technology

[0009] At present, the domestic market demand for lysine is relatively large, and the above production methods are far from meeting the market demand. The main reasons include the following three aspects: First, due to the improvement of people's living standards and food nutrition needs, and the feed industry The improvement of product technical level and quality requirements has greatly promoted the market demand for lysine; secondly, due to the high investment in lysine production equipment and the huge supporting process, the construction progress of new projects has been limited; thirdly, the price of agricultural and sideline products in the market has risen, In particular, the price of soybeans has doubled, increasing production costs, causing economic pressure and burden on production enterprises, and restricting the growth rate of domestic lysine production

[0010] In the existing production technology, ceramic membrane filtration technology is generally used in the filtration of lysine fermentation liquid. The old process has a lot of sewage and high energy consumption. The ceramic membrane often breaks. Once the membrane breaks, it has to be shut down for maintenance. Production enterprises cause a lot of loss of resources and energy consumption

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