活性染料染色废水的回用研究

A research on the wastewater recycling in the reactive dye dyeing process

采用中温型活性染料对棉织物进行染色加工,其染色废水被分类脱色降解处理而得到回用水I和回用水II。然后分别以回用水I和回用水II为染色介质进行染色,重点考察了其染色织物的K/S曲线和总色差DE与氯化钠浓度的关系,并将其与自来水染色试样进行了比较。结果表明,回用水Ⅰ的无机盐含量远高于回用水II;在相同的工艺条件下,以回用水I为介质的染色工艺比以自来水介质的染色工艺可以节省氯化钠的用量,与回用水I相比,回用水II作为染色介质更易于回用在染色工程中。

This paper uses the middle temperature reactive dye to finish cotton fabric, and the wastewater from dyeing process is classified to receive decolorization and degradation, then the recycled water I and II is obtained. Using I and II as dyeing medium, the K/S curve of the fabric and the relationship between the total color deviation DE and the concentration of sodium chloride is particularly studied, and the results are compared with those using tap water as dyeing medium. It is found that the content of inorganic salts in the recycled water I is much higher than that in the recycled water II; under the same dyeing conditions, the dyeing technology using the recycled water I can save the applied amount of sodium chloride than that using tap water as dyeing medium; and compared to the recycled water I, the recycled water II is much more easy to be used in the dyeing process.