Investigation of the Possibility for Enzymatic Utlization of Chicken Bones

ABSTRACT

A perspective approach is proposed in which ground chicken bones remaining in the poultry slaughterhouses after extracting the meat from them for human food are treated by minimal amounts of purified alkaline protease (Alcalase). Using this process two principal fractions were obtained- soluble protein hydrolysate (SPH) that can be used as component of microbiological cultivation broth media or as a “protein” nutritive additive in the diet of domestic animals and insoluble mainly inorganic fraction (IF) that can find application as fertilizer containing Ca, Mg, and small amounts of P, C, and N or can be used as additive in the diet of hens and other domestic animals. The yields of SPH and IF regarding the quantity of the starting chicken bones were about 22% and 18%, respectively. The process is perspective since: 1. It is energy saving especially when the SPH fraction is used directly for animal feeding without drying; 2. It is not labour consuming; and 3. A waste product is converted into useful substances without any pollution for the environment.

Keywords:

• protein hydrolysis
• animal wastes
• bio-fertilizer
• horticulture
• feeding additives
• avoiding environment pollution