Process of Fish gelatin production and its applications
People from different religions and cultures widely accept gelatin products made from fish. The skin of fish is the primary waste product and is not good for an eco-friendly environment. So this potential pollutant of the environment has its positive use in the form of gelatin. The fish skin consists of collagen in large quantities. By-products of both warm and cold water fish help in the production of this gelatin. Scientists have been working to find a way to enhance the physicochemical properties of fish gelatin since the patent holder Grossman and Bergman came up with the original characterization and extraction in detail.
The process of obtaining gelatin from fish begins with cleaning fish skin in cold water and cutting them into small sizes. Then the skin goes through treatment of dilute alkali solution till it reaches a neutralized stage after washing all the excess acid with plenty of water. This same process follows after the application of citric acid. The next step involves extracting neutralized citric acid fish skin with hot water to enable the partially degraded collagen materials to solubilize. With the help of a cellulose frame filter, the filtration process takes place to remove the impurities. Finally, to obtain the gelatin powder, the neutralized solution goes through a sequential process of evaporation, filtration, sterilization, and chilling.
The addition of gelatin is very common to low-fat dairy products like ice cream, yogurt, and buttermilk. The reason is to give a sensation of consuming melted fats in the mouth. The use of gelatin in creams and whipped creams does not only help in stabilizing their consistency but also in providing a smooth and creamy mouth feel. The use of gelatin in producing hard capsules and soft gels lowers the manufacturing cost and complexities. Gelling gelatin provides resistance and hardness to the tablets. It protects sensitive and delicate ingredients from microbial growth and other types of contamination. Gelatin also has wide use in the cosmetic and photography industry.