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Multi-Objective Optimization of Supercritical Water Oxidation for Radioactive Organic Anion Exchange Resin Wastewater Using GPR–NSGA-II

Shranjeno v:
izdano v:Processes vol. 13, no. 12 (2025), p. 3759-3780
Glavni avtor: Jin Yabin
Drugi avtorji: Xu, Tiantian, Zhang, Le, Zhang, Qian, Zhou, Liang, Shen, Zhe, Wan Zhenjie
Izdano:
MDPI AG
Teme:
Supercritical water oxidation
Organic wastes
Sensitivity analysis
Chemical oxygen demand
Nitrogen
Radioactive wastes
Optimization
Anion exchanging
Genetic transformation
Waste disposal
Multiple objective analysis
Liquids
Oxidants
Energy consumption
Industrial plant emissions
Efficiency
Corrosion
Wastewater treatment
Nuclear reactors
Nuclear power plants
Oxidizing agents
Experiments
Algorithms
Correlation analysis
Resins
Process parameters
Emissions
Parameter sensitivity
Effluents
Sorting algorithms
Optimization models
Machine learning
Nuclear energy
Cluster analysis
Genetic algorithms
Oxidation
Temperature
Synergistic effect
Gaussian process
Fluidized bed reactors
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Resumen:Radioactive organic anion exchange resins present a significant challenge in nuclear power plant waste disposal due to their volatility, instability, and biotoxicity. Based on experimental degradation data from the supercritical water oxidation (SCWO) of organic anion exchange resin waste liquids from the nuclear industry, this study conducted correlation analysis, cluster analysis, and Sobol sensitivity analysis of key process parameters. The results indicate that temperature is the primary factor influencing chemical oxygen demand (COD) and total nitrogen (TN) removal, while oxidant dosage exhibits a notable synergistic effect on nitrogen transformation. A Gaussian Process Regression–Non-Dominated Sorting Genetic Algorithm II (GPR–NSGA-II) multi-objective optimization model was developed to balance COD/TN removal rate and treatment cost. The optimal operating conditions were identified as a temperature of 472.2 °C, an oxidant stoichiometric ratio (OR) of 136%, an initial COD concentration of 73,124 mg·L−1, and a residence time of 3.8 min. Under these conditions, COD and TN removal efficiencies reached 99.63% and 32.92%, respectively, with a treatment cost of 128.16 USD·t−1. The proposed GPR–NSGA-II optimization strategy provides a methodological foundation for process design and economic assessment of SCWO in treating radioactive organic resin waste liquids and can be extended to other studies involving high-concentration, refractory organic wastewater treatment.
ISSN:2227-9717
DOI:10.3390/pr13123759
Fuente:Materials Science Database