Curdlan paste preparation and preparation method thereof

Abstract

The invention relates to the technical field of microbial polysaccharide preparation, in particular to a curdlan paste preparation and a preparation method thereof. The curdlan paste preparation comprises the following components in percentage by weight: 20-50% of an anhydrous paste carrier, 0.2-1% of a cooling agent, 0.1-2% of a pH regulator, 1-20% of a water activity regulator, 0.02-3.5% of a redox potential regulator, 0.1-1% of a functional protective agent, 0-0.05% of a food preservative and the balance of curdlan blocks; the curdlan paste preparation is prepared by chopping curdlan blocksand the additives into uniform paste and packaging the paste in vacuum. The preparation method is simple in process and low in production cost; and the gel self-cooling process is put forward for thefirst time so that the possibility of functional loss caused by friction temperature rise between the gel and the rotary cutter can be greatly reduced, the technical problem of preservation of the curdlan paste preparation at normal temperature is solved, and the final product has relatively strong market competitiveness.

Description

technical field [0001] The invention relates to the technical field of microbial polysaccharide preparation, in particular to a Kederan polysaccharide paste preparation and a preparation method thereof. Background technique [0002] Curdlan gum is an exopolysaccharide produced by microorganisms such as Agrobacterium under nitrogen-limited conditions. It is a water-insoluble glucan composed of 300-500 glucose residues with β-1,3-glycosidic bonds. Heat-gelling properties, also known as thermogelling polysaccharides. Curdlan gum is widely used in the food processing industry due to its functions of gelling, water and oil retention, thickening, heat resistance, freezing resistance, texture improvement, and film formation. [0003] At present, the products of major manufacturers in Japan and China are all solid powders. Although powder preparations have been produced on a large scale and have certain applications in the food processing industry, there are still many problems in ...

AI Technical Summary

Problems solved by technology

If you want to realize the large-scale extraction process, you need hundreds of tons of large tanks for alkali-dissolving and acid precipitation, and the cost is huge;

[0006] 2) The use of a large amount of acid and alkali has a large storage and use safety risk, and also brings high cost pressure to the subsequent sewage treatment;

[0007] 3) Ethanol is generally used in the solvent washing process. CN200410041271.8 discloses a microbial polysaccharide-thermogel extraction process. The amount of ethanol used is 1-3 times the volume of the centrifuged sediment of the fermentation broth. CN201810017114.5 discloses a In the method of fermenting curdlan gum, the amount of ethanol used is twice that of the sediment. The use of large amounts of ethanol has safety risks and the production cost is also high;

[0008] 4) The polymer molecules of curdlan gum are damaged to some extent in the process of alkali-dissolving and acid-precipitating, which ultimately has a certain negative impact on the gel strength of the product. In addition, the yield of curdlan gum after this series of complicated processes is also reduced. certain loss

[0011] Throughout the food and microbial fermentation industry, food or additives that exist in liquid or paste form abound, such as various sauces, moon cake fillings, yeast paste, etc. Xanthan gum, gellan gum, and curdlan gum are all solid powders, but considering the high cost, complexity, and convenience of the post-extraction process of curdlan gum, it is necessary to develop a method that can be used at room temperature (25°C) , the same below) stable storage of Kederan polysaccharide paste preparations has important technical value and practical significance, eliminating alkali dissolution, acid precipitation, ethanol elution, spray drying and other processes, which can greatly reduce production costs, production safety risks and Environmental protection pressure, making products with great market competitiveness

At present, there is no technical research and literature reports related to Curdran polysaccharide paste preparations in the world, and there is no commercialized Curdran polysaccharide paste preparations stored at room temperature

Images