Department of Chemical Engineering, University of Vigo, Isaac Newton Building, Campus Lagoas-Marcosende, 36310 Vigo, Spain; Faculty of Engineering, "Vasile Alecsandri" University of Bacau, Calea Marasesti 157, 600115 Bacau, Romania.
Department of Chemical Engineering, University of Vigo, Isaac Newton Building, Campus Lagoas-Marcosende, 36310 Vigo, Spain.
Sci Total Environ. 2018 Sep 1;635:397-404. doi: 10.1016/j.scitotenv.2018.04.139. Epub 2018 Apr 24.
In this work, an eco-friendly solution for the remediation of wastewater generated in the lignin recovery process from eco-industrial paper mill has been proposed in their way towards a more circular economy strategy. Thus, the application of the electro-Fenton process for the degradation of the non-recovered lignin and other organic compounds form a scarcely studied acid black liquor waste (ABLW) was successfully performed. This treatment was able to operate in a range of COD loads (0.5-19.5mgO·L) showing high degradation values of the ABLW determined by the abatement of color, total phenolic content and COD. Then, the optimization of the working conditions for the design of a sustainable treatment system with optimum efficiency was carried out using a response surface methodology. The experiment carried out in the calculated optimal conditions for the electro-Fenton degradation process (current intensity 132.5mA, catalyst dosage of 0.10mM, and temperature 40°C) showed a COD removal of 74.82% and current efficiency 77.79%, close to the theoretical value predicted by the model 73.12% and 77.06%, respectively. In addition, the identification of the final products permitted to confirm the mineralization efficiency.
在这项工作中，提出了一种环保的解决方案，用于处理生态工业造纸厂从木质素回收过程中产生的废水，以实现更循环的经济策略。因此，成功地应用电芬顿工艺来降解未回收的木质素和其他有机化合物，这些物质来自研究较少的酸性黑液废物（ABLW）。这种处理方法能够在 COD 负荷范围（0.5-19.5mgO·L）内运行，通过降低 ABLW 的颜色、总酚含量和 COD，显示出高的降解值。然后，使用响应面法对工作条件进行优化，以设计具有最佳效率的可持续处理系统。在电芬顿降解过程的计算最佳条件下进行的实验（电流强度 132.5mA，催化剂用量 0.10mM，温度 40°C）显示 COD 去除率为 74.82%，电流效率为 77.79%，接近模型预测的 73.12%和 77.06%的理论值。此外，最终产物的鉴定证实了其矿化效率。
