The invention relates to a method for producing highly digestible, partly hydrolyzed keratinaceous material, preferably from feathers, hair, wool, hooves or nails, comprising the steps of (1) hydrolyzing keratinaceous material in the presence of water, in a hydrolyzer with heat and at a pressure between about 2 bar and about 100 bar to obtain a partly hydrolyzed keratinaceous material; (2) pre-drying the partly hydrolyzed keratinaceous material of step (1) to obtain a semi-dried partly hydrolyzed keratinaceous material having a solids content of about 50 wt % or higher, preferably between 60-85 wt %; and (3) concurrently drying and grinding the semi-dried partly hydrolyzed keratinaceous material of step (2) in an air turbulence mill, at about atmospheric pressure to obtain dried partly hydrolyzed keratinaceous material; wherein preferably steps (2) and (3) are carried out such that the drop in pepsin and/or ileal digestibility caused by steps (2) and (3) is less than 10%, and/or the pepsin and ileal digestibility of the dried partly hydrolyzed keratinaceous material is higher than respectively 75% and 80%; wherein the resultant dried partly hydrolyzed keratinaceous material comprises at least partly insoluble material, and wherein the average particle size of the dried partly hydrolyzed keratinaceous material (d50) leaving the air turbulence mill is between 20 m and 0.7 mm and the d90 is below 1 mm as measured with laser diffraction using a dry powder Beckman Coulter particle size analyzer.

The invention relates to a method for producing highly digestible, partly hydrolyzed keratinaceous material, preferably from feathers, hair, wool, hooves or nails, comprising the steps of (1) hydrolyzing keratinaceous material in the presence of water, in a hydrolyzer with heat and at a pressure between about 2 bar and about 100 bar to obtain a partly hydrolyzed keratinaceous material; (2) pre-drying the partly hydrolyzed keratinaceous material of step (1) to obtain a semi-dried partly hydrolyzed keratinaceous material having a solids content of about 50 wt % or higher, preferably between 60-85 wt %; and (3) concurrently drying and grinding the semi-dried partly hydrolyzed keratinaceous material of step (2) in an air turbulence mill, at about atmospheric pressure to obtain dried partly hydrolyzed keratinaceous material; wherein preferably steps (2) and (3) are carried out such that the drop in pepsin and/or ileal digestibility caused by steps (2) and (3) is less than 10%, and/or the pepsin and ileal digestibility of the dried partly hydrolyzed keratinaceous material is higher than respectively 75% and 80%; wherein the resultant dried partly hydrolyzed keratinaceous material comprises at least partly insoluble material, and wherein the average particle size of the dried partly hydrolyzed keratinaceous material (d50) leaving the air turbulence mill is between 20 m and 0.7 mm and the d90 is below 1 mm as measured with laser diffraction using a dry powder Beckman Coulter particle size analyzer.

The present disclosure relates to pharmaceutical field, providing a hydrolyzed chicken sternal cartilage extract, method for producing the same and use thereof. The hydrolyzed chicken sternal cartilage extract has a type II collagen content of 50% and a chondroitin sulfate content of 20%. In China, a huge amount of livestock and poultry are consumed, and the total consumption almost reaches of the worldwide livestock and poultry consumption. Chicken sternal cartilage is one of the main by-products in broiler chicken processing. In the present disclosure, a hydrolyzed chicken sternal cartilage extract rich in type II collagen and chondroitin sulfate is obtained by using biological enzymatic hydrolysis technique. Experiments results show that the hydrolyzed chicken sternal cartilage extract produced by the present disclosure has a good anti-inflammatory effect and can be used to prepare medications for treating osteoarthritis.

The present disclosure relates to pharmaceutical field, providing a hydrolyzed chicken sternal cartilage extract, method for producing the same and use thereof. The hydrolyzed chicken sternal cartilage extract has a type II collagen content of 50% and a chondroitin sulfate content of 20%. In China, a huge amount of livestock and poultry are consumed, and the total consumption almost reaches of the worldwide livestock and poultry consumption. Chicken sternal cartilage is one of the main by-products in broiler chicken processing. In the present disclosure, a hydrolyzed chicken sternal cartilage extract rich in type II collagen and chondroitin sulfate is obtained by using biological enzymatic hydrolysis technique. Experiments results show that the hydrolyzed chicken sternal cartilage extract produced by the present disclosure has a good anti-inflammatory effect and can be used to prepare medications for treating osteoarthritis.

The invention discloses a liquefaction device of hard bone, comprising: outer cavity having upper end detachably sealed with upper cover, and lower end openable/closable sealed with lower sealing cover, first liquefaction cavity coaxially slidably disposed in outer cavity, stainless steel cage disposed coaxially in first liquefaction cavity, second liquefaction cavity fixed to outer sidewall of outer cavity such that lower end portion of outer cavity is located in second liquefaction cavity. The invention also provides a method for co-production of bone collagen polypeptide and ultrafine bone powder based on liquefaction device, including: selecting hard bones, crushing; performing first-stage and second-stage liquefaction to obtain liquid phase and solid phase; centrifuging, concentrating, drying liquid phase to obtain bone collagen polypeptide; drying, coarsely and superfine pulverizing solid phase to obtain ultrafine bone powder. The invention has effects of simplifying process, improving production efficiency, and reducing production and equipment investments.

The invention discloses a liquefaction device of hard bone, comprising: outer cavity having upper end detachably sealed with upper cover, and lower end openable/closable sealed with lower sealing cover, first liquefaction cavity coaxially slidably disposed in outer cavity, stainless steel cage disposed coaxially in first liquefaction cavity, second liquefaction cavity fixed to outer sidewall of outer cavity such that lower end portion of outer cavity is located in second liquefaction cavity. The invention also provides a method for co-production of bone collagen polypeptide and ultrafine bone powder based on liquefaction device, including: selecting hard bones, crushing; performing first-stage and second-stage liquefaction to obtain liquid phase and solid phase; centrifuging, concentrating, drying liquid phase to obtain bone collagen polypeptide; drying, coarsely and superfine pulverizing solid phase to obtain ultrafine bone powder. The invention has effects of simplifying process, improving production efficiency, and reducing production and equipment investments.

A method for recycling protein waste and producing an edible product for animal consumption comprises grinding animal carcasses or parts thereof and thereafter acidifying the waste. The acidified waste may then be emulsified, followed by a heat shock and then fed to animals. Alternatively, a second emulsification may be employed prior to being used for animal consumption. The emulsified products may be provided to animals as a liquid, or dried to a paste prior to use.

The present invention relates to a foodstuff comprising feather hydrolysate for use in improving performance during exercise and/or improving recovery after exercise in a dog. It also relates to a method of improving the performance in a dog during exercise and/or improving recovery after exercise, the method comprising administering to a dog a foodstuff which comprises feather hydrolysate.

A method for recycling protein waste and producing an edible product for animal consumption comprises grinding animal carcasses or parts thereof and thereafter acidifying the waste. The acidified waste may then be emulsified, followed by a heat shock and then fed to animals. Alternatively, a second emulsification may be employed prior to being used for animal consumption. The emulsified products may be provided to animals as a liquid, or dried to a paste prior to use.

A method for recycling protein waste and producing an edible product for animal consumption comprises grinding animal carcasses or parts thereof and thereafter acidifying the waste. The acidified waste may then be emulsified, followed by a heat shock and then fed to animals. Alternatively, a second emulsification may be employed prior to being used for animal consumption. The emulsified products may be provided to animals as a liquid, or dried to a paste prior to use.