Document Type
Article
Publication Date
9-2023
Keywords
titanate nanofibers; photocatalysis; poultry; litter liquid digestate
Abstract
Titanate nanofibers (TNFs) were synthesized using a hydrothermal method and were employed for the first time in this study to photocatalytically degrade organic pollutants found in flocculated liquid digestate of poultry litter. The photocatalytic performance of TNFs, with a bandgap of 3.16 eV, was tested based on degradation of organic pollutants and removal of color. Five combinations of pollutant concentration and pH were examined (0.2 to 1.3 g·L−1 at pH 4 to 10). Central composite design (CCD) and response surface methodology (RSM) were applied in order to optimize the removal rates of volatile fatty acids (VFA) and chemical oxygen demand (COD), and the decolorization rate. There were no significant differences between the regression models generated by the CCD/RSM and the experimental data. It was found that the optimal values for pH, dosage, VFA removal rate, COD removal rate and decolorization rate were 6.752, 0.767 g·L−1, 72.9%, 59.1% and 66.8%, respectively. These findings indicates that photocatalytic TNFs have potential for the posttreatment of anaerobic digestion effluent, as well as other types of wastewater.
Citation
Xiao, Y., Tian, Y., Zhan, Y., & Zhu, J. (2023). Degredation of Organic Pollutants in Flocculated Liquid Digestate Using Photocatalytic Titanate Nanofibers: Mechanism and Response Surface Optimization. Frontiers Of Agricultural Science And Engineering, 10 (3), 492-502. https://doi.org/10.15302/J-FASE-2023503
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This work is licensed under a Creative Commons Attribution 4.0 International License.
Included in
Bioresource and Agricultural Engineering Commons, Materials Science and Engineering Commons
Comments
Supplementary materials
The online version of this article at https://doi.org/10.15302/J-FASE-2023503 contains supplementary materials (Figs. S1–S4; Table S1).