The leather industry has been looking for alternatives to minimize its environmental impacts, including studies to reduce the pollution load of liquid effluents from the leather process. Although studies reducing the supply of chemicals have already indicated optimized offers of fatliquoring and retanning agents, the effect of the scale-up of these optimized conditions on effluents and the quality of the leather remains unknown. This study aims to reduce the pollution load of post-tanning effluents by reducing leather chemicals supply. Tests were performed on pilot and industrial scales, reducing the offer of retanners and fatliquors in two levels: 19% and 26%. The effluents were tested for pH, conductivity, dissolved solids, sulfate, biochemical oxygen demand, and chemical oxygen demand. The leather was tested for organoleptic properties and physical-mechanical tests. The reduction of chemicals allowed the depletion of the raw wastewater pollution load. The leather obtained showed a quality within the established standards. Besides, post-tanning formulation costs were reduced by 24%.

皮革行业一直在寻找替代方案以尽量减少其对环境的影响，包括研究以减少皮革加工过程中液体流出物的污染负荷。尽管减少化学品供应的研究已经表明加脂剂和复鞣剂的优化供应，但这些优化条件的放大对废水和皮革质量的影响仍然未知。本研究旨在通过减少皮革化学品的供应来减少鞣后废水的污染负荷。以中试和工业规模进行了测试，将复鞣剂和加脂剂的供应量减少了两个级别：19% 和 26%。测试流出物的 pH 值、电导率、溶解固体、硫酸盐、生化需氧量和化学需氧量。测试皮革的感官特性和物理机械测试。化学品的减少允许消耗原始废水污染负荷。获得的皮革显示出符合既定标准的质量。此外，鞣后配方成本降低了 24%。