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Decolourisation of waste water

机译：废水脱色

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摘要

Water is a main ingredient for wet processing with its requirement going as high as 150 litres/kg of the textile material to be processed. The amount of a composite mill's effluent discharged varies up to 10 million litres/day depending on the quality and type of textile and its manufacturing processes. Wastewater generated at various stages of textile dyeing differs in its composition, strength as well as volume. Its high pollution load arises mostly from the spent dye baths that are mainly composed of unexhausted, hydrolysed and surface deposited dyes as well as various unexhausted chemicals and auxiliaries which have been washed away from the dyed material. These effluents are characterised by their intense colour, high COD, salinity and the variable pH.
机译：水是湿法加工的主要成分，对水的需求量高达150升/千克。复合工厂的废水排放量每天最多可达1000万升，具体取决于纺织品的质量和类型及其制造工艺。在纺织品染色的各个阶段产生的废水，其组成，强度和体积都不同。它的高污染负荷主要来自用过的染色浴，该染色浴主要由未耗尽，水解和表面沉积的染料以及已从染色材料上冲走的各种未耗尽化学药品和助剂组成。这些废水的特征在于其强烈的颜色，高的COD，盐度和可变的pH。

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