Fuzzy optimization of the photo-Fenton process on o-toluidine degradation in the aspect wastewater treatment

IF 5.3 Q2 ENGINEERING, ENVIRONMENTAL Cleaner Engineering and Technology Pub Date : 2024-10-01 DOI:10.1016/j.clet.2024.100817
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Abstract

Significant volumes of wastewater, particularly from the textile industry, pose environmental concerns due to the presence of hazardous substances such as ortho-toluidine (OT). The photo-Fenton process can be used to break down and remove this hazardous organic compound. Previous studies on the photo-Fenton process have focused on local optimization of operating variables without considering cost factors. The photo-Fenton process is studied in this paper with UVA irradiation, Fe2+ dosage, and H2O2 concentration considered as variables. The study uses fuzzy optimization in a multi-objective framework for making decisions to determine the optimal values of OT degradation with its corresponding cumulative uncertainty error (YA), and the total operating cost (CT), both of which are essential for assessing the techno-economic feasibility of the process. The Pareto front was generated from the objective functions to establish the boundary limits for YA and CT. The results show an overall satisfaction level of 71.81% for the objective functions, indicating a partially satisficing solution for maximizing OT degradation while minimizing operating cost. The optimum conditions of the variables require 85.70 W m−3 UVA irradiation, 0.5177 mM for Fe2+ dosage, and 7.85 mM for the H2O2 concentration. These conditions yielded an OT degradation value of 83.22% and a total operating cost of 768.61 USD·m−3. Comparison with previous literature showed an OT degradation efficiency that was 16.78% lower. However, this tradeoff in the process efficiency is offset by a total operating cost that is 2.28 times cheaper, emphasizing the cost-effectiveness of the fuzzy optimized solution.
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模糊优化光-芬顿工艺在废水处理中对邻甲苯胺的降解作用
大量废水,尤其是纺织业的废水,因含有邻甲苯胺(OT)等有害物质而引发环境问题。光-芬顿工艺可用于分解和去除这种有害有机化合物。以往对光-芬顿工艺的研究主要集中在操作变量的局部优化,而没有考虑成本因素。本文以 UVA 照射、Fe2+ 用量和 H2O2 浓度为变量,对光-芬顿工艺进行了研究。该研究在多目标框架下使用模糊优化进行决策,以确定 OT 降解的最佳值及其相应的累积不确定性误差(YA)和总运营成本(CT),这两个值对于评估该工艺的技术经济可行性至关重要。根据目标函数生成帕累托前沿,以确定 YA 和 CT 的边界限制。结果表明,目标函数的总体满意度为 71.81%,这表明在最大化 OT 降解的同时最小化运营成本的解决方案部分令人满意。变量的最佳条件需要 85.70 W m-3 的 UVA 照射、0.5177 mM 的 Fe2+ 用量和 7.85 mM 的 H2O2 浓度。在这些条件下,OT 降解值为 83.22%,总运行成本为 768.61 美元-m-3。与以前的文献相比,OT 降解效率低 16.78%。然而,总运营成本降低了 2.28 倍,从而抵消了工艺效率上的折衷,凸显了模糊优化解决方案的成本效益。
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来源期刊
Cleaner Engineering and Technology
Cleaner Engineering and Technology Engineering-Engineering (miscellaneous)
CiteScore
9.80
自引率
0.00%
发文量
218
审稿时长
21 weeks
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