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HIGH-KERATIN-CONTENT SLAUGHTERHOUSE BY-PRODUCTS PROCESSING FOR PETFOOD OR COSMETICS RAW MATERIALS
Abstract
In this study we examined such a high-keratin-content slaughterhouse by-product as pig bristles and poultry feathers. Our first and most important aim in this research to make a decision about the using direction of a final products. Only after our decision we can determine the most optimal treating and processing method for these slaughterhouse by-products. In our model experiment we can produce different products for example raw materials for cosmetics and petfood products. But the requirements of two main using way are very different. The most important requirements of high-keratin-content slaughterhouse by-products processing for feed flours are the high digestible protein content and the another requirements for cosmetic products is the high-keratin-content. Production of the cosmetics raw materials are more profitable, but involves more risks, because there are more district requirements for the raw materials and production. Therefore our first aim to make feed flours for petfood as a final products. However during the feed flour production we have to breakdown the keratin into digestible protein with a long-time-interval, high-temperature, high-pressure hydrolysis treatment. The bristle- and feather flours are the final product of this treatment have a valuable amino acid content. The high-keratin-content feed flours that are made from pig bristle and poultry feather could be complete the amino acid content of the another different petfood raw materials such as the meat flour, the fish flour and blood flour in the dry petfood ingredients.
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