Denim is a cotton fabric specifically used to manufacture jeans. Denim processing generates complex effluents with high levels of pumice stone, color and chemical oxygen demand (COD). There is therefore a need for advanced treatment methods to limit pollution of natural waters. Here, we hypothesized that Fenton oxidation, a method using Fe²⁺ and H₂O₂, could replace the traditional step of activated sludge treatment. We studied a daily composite sample at laboratory scale for preliminary settling, chemical settling and Fenton oxidation. We found that pumice stone can be effectively controlled by preliminary settling with partial COD removal and limited color removal. Chemical treatment improved COD removal, but color reduction still remained partial. Fenton oxidation decreased color below visual detection after 5 min and COD decreased to 110 mg/L after 30 min. These findings surpassed the performances of activated sludge treatment.

中文翻译：

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Fenton氧化无需生物处理即可有效去除牛仔布棉废水中的颜色和有机物

牛仔布是专门用于制造牛仔裤的棉织物。牛仔布加工会产生复杂的废水，其中的浮石，颜色和化学需氧量（COD）含量高。因此，需要先进的处理方法以限制天然水的污染。在这里，我们假设Fenton氧化，一种使用Fe ²⁺和H ₂ O _2的方法，可以代替传统的活性污泥处理步骤。我们研究了实验室规模的日常复合样品的初步沉降，化学沉降和Fenton氧化。我们发现浮石可以通过部分COD去除和有限的颜色去除的初步沉降得到有效控制。化学处理改善了COD的去除，但是颜色的减少仍然保持部分。5分钟后，Fenton氧化作用使颜色降低至视觉检测以下，而30分钟后，COD降至110 mg / L。这些发现超过了活性污泥处理的性能。