Lime treatment of keratinous materials for the generation of highly digestible animal feed: 1. Chicken feathers
Lime treatment of keratinous materials for the generation of highly digestible animal feed: 1. Chicken feathers
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DOI：
10.1016/j.biortech.2005.05.021
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发表时间：
2006-07-01
影响因子：
11.4
通讯作者：
Holtzapple, Mark T.
中科院分区：
文献类型：
--
作者：
Coward-Kelly, Guillermo;Chang, Vincent S.;Holtzapple, Mark T.
用石灰（氢氧化钙）处理鸡毛角蛋白，得到一种富含氨基酸和多肽的液体产品，可作为动物饲料的补充。研究了不同处理条件对可溶性角蛋白性能的影响。在高温下（150摄氏度），80%的羽毛角蛋白在25分钟内被溶解，而在中等温度下（100摄氏度）需要相对较长的反应时间（300分钟）。在150℃下水解3小时后，95%的羽毛角蛋白被消化。在推荐的条件下(100℃，300 min, 0.1 g Ca（OH)(2)/g干羽），石灰处理后，约54%的钙可通过碳化回收。在瘤胃液中，可溶性角蛋白的氨产量与大豆和棉籽粕相似，远低于尿素，说明饲喂可溶性角蛋白不会产生氨毒性。(c) 2005 Elsevier Ltd版权所有。
Chicken feather keratin was treated with lime (calcium hydroxide) to obtain a liquid product rich in amino acids and polypeptides that can be used as an animal feed supplement. The effect of treatment conditions and the properties of the soluble keratin were studied. At high temperatures (150 degrees C), 80% of feather keratin was solubilized within 25 min, whereas a relatively longer reaction time (300 min) is needed at moderate temperatures (100 degrees C). After 3 h of hydrolysis at 150 degrees C, 95% of feather keratin was digested. For the recommended conditions (100 degrees C, 300 min, and 0.1 g Ca(OH)(2)/g dry feather), after lime treatment, about 54% of calcium can be recovered by carbonating. In rumen fluid, ammonia production from soluble keratin was similar to that of soybean and cottonseed meals and was greatly less than that of urea, indicating that no ammonia toxicity will result from cattle being fed soluble keratin. (c) 2005 Elsevier Ltd. All rights reserved.