We introduce high frequency pulsed electrodialysis (hf-pED) to process the acidic filtrate of a Kraft pulp bleaching stage, tested in a pilot trial. Compared with conventional electrodialysis, hf-pED at 2,000 Hz allows a reduction in operational cost by 12%, estimated as 0.54 USD/m³ of acidic filtrate, while simultaneously preventing membrane fouling. The proposed sectorial stream treatment is demonstrated to significantly improve the quality of the final effluent, according to mass balances, making it more suitable for irrigation applications, considering requirements of irrigation norms. Thus, we estimate a reduction of 59, 21, and 20% in the concentration of chloride, sodium, and sulfate, respectively, in the final effluent of a conventional Kraft pulping mill. This strategy is presented as a sustainable and economic solution compared with the desalinization of the whole final effluent.

我们引入高频脉冲电渗析 ( hf-pED ) 来处理牛皮纸浆漂白阶段的酸性滤液，并在试点试验中进行了测试。与传统电渗析相比， 2,000 Hz 的hfpED可将运营成本降低 12%，估计为 0.54 美元/立方米³酸性滤液，同时防止膜污染。根据质量平衡，拟议的部门河流处理被证明可以显着提高最终出水的质量，使其更适合灌溉应用，同时考虑到灌溉规范的要求。因此，我们估计传统牛皮纸制浆厂最终流出物中氯化物、钠和硫酸盐的浓度分别降低了 59%、21% 和 20%。与整个最终废水的脱盐相比，该策略被认为是一种可持续且经济的解决方案。