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氧化镁和碱性蛋白酶两步法处理废铬革屑 总被引:8,自引:5,他引:8
采用两步法处理铬鞣革屑。首先用氧化镁处理提取明胶,然后再在碱性条件下通过蛋白酶水解作用提取水解蛋白质。研究了各种因素,如反应液pH值、温度及反应时间等对明胶和水解蛋白质质量及其回收率的影响,并分别测定了明胶和水解蛋白质的水分含量、灰分含量、铬含量、总固体含量及回收率,明胶的黏度和密度。研究结果表明Cr2O3在明胶和水解蛋白质中含量在1-10×10-6之间;明胶黏度可达16.2813CP,颜色为淡黄色,符合国家明胶QB581-1981标准中的一级标准;水解蛋白质可作饲料;蛋白质总回收率为80%左右。 相似文献
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一种改性胶原蛋白复鞣剂的研制及应用 总被引:8,自引:2,他引:6
探讨了用铬-铝络合物改性铬革屑水解液及其产品在鞣制或复鞣中的应用。通过实验研究,选择适宜的水解铬革屑的方法和改性条件,发现改性产品在应用中具有较好的鞣制复鞣填充作用,可促进对铬的吸收,坯革丰满、柔软、有弹性,粒纹清晰细致;对染料吸收性好、着色均匀;并可提高成革的收缩温度,降低废液中的含铬量。 相似文献
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Hydrolysis of tannery wastes to protein meal for animal feedstuffs: A process and product evaluation
Enzo Montoneri Giovanni Rizzi Arnaldo Rizzi Archimede Mordenti Adriano Bauli Massimo Riolfatti Laura Pellegrini 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1994,59(1):91-99
Hydrolysis of protein solid wastes from tanneries to yield protein meal for animal nutrition has been performed in a pilot assembly designed to process 400 kg h?1 of disposal material under optimum energy consumption and product yield conditions. Evaluation of the significance of amino acid degradation caused by the process, in relation to the product cost and quality in animal nutrition, was the purpose. A nutrition bioassay was carried out to study the incidence of dietary substitution of the above protein meal for soybean meal on growth performance by early weaned piglets. The results show that degradation of serine, proline, arginine and threonine occurs during collagen hydrolysis, and that only the threonine concentration in the product falls below the dietary requirement. However, integration of protein meal diets with the necessary amino acid content may be accomplished cheaply. Compared with other vegetable and animal commercial protein meals, the cost of the product obtained from tanned hides appears competitive. Processing of other tannery disposal material is not recommended, due to the low protein content of the starting material. 相似文献
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废铬革屑还原铬鞣液制备新方法的研究 总被引:3,自引:1,他引:2
本文介绍了废铬革屑还原铬鞣液的优越性,并用该技术制得了废铬革屑还原铬鞣液,应用结果表明,废铬革屑还原铬鞣液制性能良好,产品价格低廉。 相似文献
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用铬革屑制备助鞣剂的研究 总被引:9,自引:1,他引:8
本文对从铬革屑中提取胶原产物制备助鞣剂的方法进行的探讨。结果表明,用石灰处理铬革屑从中提出胶原产物,用乙醛酸对胶原产物进行改性,可得到一种强阴离子弱阳离子型可生物降解的铬鞣助剂。采用该助鞣剂在软化后处理裸友,可进行无盐浸酸铬鞣,可使铬鞣废液中的铬降至0.130gCr2O3/l,使革的收缩温度与丰满满度明显增加。 相似文献
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皮革固体废弃物制备铬鞣剂 总被引:2,自引:1,他引:2
利用紫外-可见分光度法(UV-VIS)和红外光谱,对蓝皮屑和葡萄糖分别还原红矾制备铬鞣液进行了研究。研究发现,不同还原剂反应速率相差较大。在紫外区256nm和352nm处有两个吸收谱带,短波吸收峰强度高于长波吸收峰强度;短波吸收峰消失,红矾转化率只达到85%左右,而长波吸收峰消失,红矾反应基本完全。并发现两种铬鞣剂的组成和结构差别较大。 相似文献