Scholarlink

<p>This study evaluated the electrooxidation (EO) pretreatment of corn industry wastewater (nejayote) and its subsequent anaerobic digestion (AD) using Fe-coated granular activated carbon (GAC-Fe) to enhance methane production. The experimental work was structured into three stages: (1) EO pretreatment of nejayote for 1&#xa0;h at current intensities of 0.5, 1.0, and 1.5&#xa0;A, followed by AD; (2) a factorial experimental design to assess the effects of GAC dosage (1, 3, and 5&#xa0;g/L) and Fe content (1%, 2%, and 3%) on AD performance using both untreated and EO-pretreated nejayote; and (3) process optimization based on methane yield and organic matter removal. EO at 1.5&#xa0;A for 1&#xa0;h resulted in the highest cumulative methane production (244 mL), outperforming other pretreatment conditions. In the experimental design phase, EO-pretreated nejayote with 1&#xa0;g/L GAC + 1% Fe yielded 38.2 mL of methane, compared to 25.1 mL from untreated nejayote with 5&#xa0;g/L GAC + 3% Fe, the highest value among the untreated samples. Process optimization revealed maximum methane production with EO-pretreated nejayote at 1&#xa0;g/L GAC (72.2 mL), and with untreated nejayote at 3.9&#xa0;g/L GAC + 1% Fe (61.5 mL), representing increases of 1.5- and 1.9-fold relative to the control, respectively. These results demonstrate that EO pretreatment enhances the hydrolysis of complex organic compounds in nejayote, improving subsequent methane generation and organic matter degradation during anaerobic digestion.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synergistic Effect of Electrooxidation and Fe-coated Activated Carbon for the Anaerobic Digestion of Corn-Industry Wastewater

  • 期刊论文

  • 发表日期：

    2025年6月4日

查看全文
  • M. A. Armenta,
  • Isaac D. Gallardo,
  • Celestino García-Gómez,
  • Pablo Gortares-Moroyoqui,
  • Vianey A. Burboa-Charis,
  • Luis H. Alvarez

摘要

This study evaluated the electrooxidation (EO) pretreatment of corn industry wastewater (nejayote) and its subsequent anaerobic digestion (AD) using Fe-coated granular activated carbon (GAC-Fe) to enhance methane production. The experimental work was structured into three stages: (1) EO pretreatment of nejayote for 1 h at current intensities of 0.5, 1.0, and 1.5 A, followed by AD; (2) a factorial experimental design to assess the effects of GAC dosage (1, 3, and 5 g/L) and Fe content (1%, 2%, and 3%) on AD performance using both untreated and EO-pretreated nejayote; and (3) process optimization based on methane yield and organic matter removal. EO at 1.5 A for 1 h resulted in the highest cumulative methane production (244 mL), outperforming other pretreatment conditions. In the experimental design phase, EO-pretreated nejayote with 1 g/L GAC + 1% Fe yielded 38.2 mL of methane, compared to 25.1 mL from untreated nejayote with 5 g/L GAC + 3% Fe, the highest value among the untreated samples. Process optimization revealed maximum methane production with EO-pretreated nejayote at 1 g/L GAC (72.2 mL), and with untreated nejayote at 3.9 g/L GAC + 1% Fe (61.5 mL), representing increases of 1.5- and 1.9-fold relative to the control, respectively. These results demonstrate that EO pretreatment enhances the hydrolysis of complex organic compounds in nejayote, improving subsequent methane generation and organic matter degradation during anaerobic digestion.

Graphical Abstract