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Reducing pollution from exhaust dye liquor of reactive dyes - Ⅱ

机译：减少活性染料废染液的污染-Ⅱ

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Dyeing with reactive dyes available in India, by exhaust method, causes heavy pollution due to strong colour of the unfixed hydrolysed dyes and a very high IDS due to heavy quantities of salt and alkali used. No satisfactory solution is available to this pollution problem so far; as the EDL contains over 85,000 ppm total dissolved solid (IDS) and permissible limit is only 2100 ppm. The use of multifunctional dyes is an expensive alternative that is not acceptable to most of the process houses, which market their processed goods in the domestic market. Some large exporters have started using multifunctional dyes but they have not been able to meet the eco-norms fully. Chemical flocculation methods are a sensible alternative to reducing water pollution. The scope and limitations of chemical flocculation methods have been fully discussed in this paper.
机译：在印度，通过排气法用活性染料进行染色会导致污染严重，这是由于未固定的水解染料的颜色浓烈，以及由于使用了大量的盐和碱而导致的IDS很高。到目前为止，尚无令人满意的解决方案来解决这一污染问题；因为EDL包含超过85,000 ppm的总溶解固体（IDS），允许的限值仅为2100 ppm。多功能染料的使用是一种昂贵的替代方法，对于大多数在国内市场销售其加工产品的加工厂来说，这是不可接受的。一些大型出口商已经开始使用多功能染料，但他们还不能完全符合生态规范。化学絮凝方法是减少水污染的明智选择。本文已经充分讨论了化学絮凝方法的范围和局限性。

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