Method for producing collagen, glutin or collagen by degreasing and deliming of fish scale

Abstract

The invention provides a method for defatting and deashing fish scales for preparing collagen or gelatin or collagen protein. The technical key points are as follows: the pollution-free high-quality fish scales are taken as raw materials, hot water of 40-50 DEG C is used for cleaning, the surface viscous substances and other impurities of the fish scales are removed; then 5-6 times of the weight of the fish scales of 1 percent-3 percent of NaOH hot alkaline solution (or 2 percent-5 percent of sodium carbonate hot alkaline solution) is used for stirring and soaking for 2-3 hours at 40 DEG C-50 DEG C, the filtration is carried out, the hot water of 40 DEG C-50 DEG C is further used for flushing, lipid substances are removed, the drying is carried out till the water content is less than 15 percent for storage and standby; after that, 5-6 times of the weight of the fish scales of water is added in a reaction kettle, 1 percent-2 percent of the weight of the fish scales of concentrated hydrochloric acid is added, the heating and cooking are carried out for 5-10 hours under the pressure of 0.1MPa-0.14MPa till the fish scales are softened to be transparent, and the filtration and the water flushing are finally carried out; the method has the advantages that the method can reduce the using amount of acid and alkali, shorten the production cycle, reduce the emission of wastes to the environment and improve the utilization rate of the fish scales. The method is an environment-friendly and resource-saving production technology.

Description

Technical field [0001] The invention belongs to the technical field of freshwater fish processing, and specifically is a degreasing and deliming method for extracting collagen from fish scales. Background technique [0002] As the prior art, the skin and bones of cows and pigs are commonly used as raw materials to process collagen and gelatin. However, due to the trend of global economic integration, mad cow disease (BSE) and foot-and-mouth disease are spreading around the world. The safety of gelatin or collagen processed from mammal bones and skins has been seriously challenged, especially as medicine, edible gelatin or The safety of collagen is even more worrying. The technology of using fish scales as raw materials to prepare safer gelatin or collagen has attracted great attention all over the world. [0003] Fish scales contain about 40% of protein, about 50% of calcium phosphate is the main ash and a small amount of fat. The presence of fat and ash makes the transparency of...

AI Technical Summary

Problems solved by technology

The deashing and degreasing methods in the prior art need to consume a large amount of acid and alkali, increase production costs, cause environmental pollution, and take a long time

For example (Wang Caili, Fish scale glue making and its comprehensive utilization, Qilu Fishery, 2002, 19(3): 40-41) soak it in hydrochloric acid for 2-3 weeks, take it out and wash it, and then lime it (2-4g / L lime milk ) for 15 to 20 days, the improved technology (Hao Jiaxi, etc., Chinese patent ZL200510044916.8, a fish scale collagen production process), although the production cycle has been shortened, the hydrochloric acid consumption is still very large, and 0.55 tons to 0.90 tons of hydrochloric acid, a large amount of waste hydrochloric acid is discharged into the water body, causing pollution to the environment