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首页> 外文期刊>Journal of the Society of Leather Technologists and Chemists >AN INTEGRATED ECO-FRIENDLY TANNING METHOD FOR THE MANUFACTURE OF UPPER LEATHERS FROM GOATSKINS
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AN INTEGRATED ECO-FRIENDLY TANNING METHOD FOR THE MANUFACTURE OF UPPER LEATHERS FROM GOATSKINS

机译：一种从山羊皮制造上层皮革的综合生态友好型鞣制方法

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摘要

Present leather-making processes cause difficulties, with regard to their perceived environmental impact. P-re-tanning and tanning processes contribute more than 90% of the total pollution load from leather processing. Conventional process methods subject the skin to wide variations in pH. Such pH changes, lead to salt formation which results in a net increase in COD, TDS, chlorides, sulphates and chromium levels in tannery wastewaters. In this study, a three-step process sequence has been explored to limit the pH range in leather processing to between 4.0-8.0. A sequence of operations, viz. enzyme unhairing, NaOH based fibre opening and pickle-less chrome tanning produces leathers matching the functional performance of conventionally processed leathers but leading to substantial environmental benefits in the reduction of COD and total solids by 43 and 70%, respectively. Water consumption for processing is reduced to 17.81 / Kg raw hide. The process sequence explored appears to be economically viable.
机译：就其对环境的感知而言，当前的皮革制造工艺会造成困难。 P复鞣和鞣制过程占皮革加工总污染负荷的90％以上。常规的处理方法使皮肤的pH值变化很大。 pH值的这种变化会导致形成盐分，从而导致制革废水中的COD，TDS，氯化物，硫酸盐和铬含量净增加。在这项研究中，已经探索了一个三步的工艺顺序，以将皮革加工的pH范围限制在4.0-8.0之间。一系列操作，即。脱毛酶，基于NaOH的纤维开孔和无泡铬鞣制皮革可以生产出与常规加工皮革相匹配的功能，但在将COD和总固体含量分别减少43％和70％方面带来了可观的环境效益。加工用水减少到17.81 / Kg生皮。探索的过程顺序似乎在经济上可行。

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