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<p>Brewery wastewater contains high organic content, and it must be properly treated before being disposed of into the environment. In this study, a novel composite photocatalyst consisting of calcined chicken bone waste doped with TiO<sub>2</sub>/MnO and SDS was synthesized by a two-step process. Experiments were performed to treat real-time brewery wastewater collected from the industry and to produce hydrogen using the synthesized composite photocatalyst in a 1 L glass reactor equipped with visible light. Further, process optimization was performed for the variable’s initial pH, photocatalyst concentration, and reaction time using the central composite design. The collected brewery wastewater has 4758 ± 287&#xa0;mg/L of COD and 950 ± 78&#xa0;mg/L of BOD levels with a pH of 5.8 ± 0.3. Preliminary experiments showed that calcined chicken bone waste doped with TiO<sub>2</sub>/MnO and SDS resulted in about 61.48 ± 2.56% of COD removal and about 28 ± 1&#xa0;mmol of hydrogen production. At optimum conditions (initial pH 8.1, photocatalyst concentration 2.23 g/L, time 180 min), the COD removal percentage and hydrogen production were 90.54 ± 1.62% and 57 ± 2 mmol, respectively. Recycle studies reveal that the synthesized composite photocatalyst is effective and stable for five cycles. Thus, the photocatalyst synthesized in this study will simultaneously produce hydrogen and degrade organic contaminants from brewery wastewater.</p>

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Photocatalytic activity of calcined chicken bone waste doped with TiO2/MnO/SDS towards brewery wastewater treatment and hydrogen production—a circular economy-based approach

  • 期刊论文

  • 发表日期：

    2025年2月14日

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  • Thamaraiselvan Arumugam,
  • Balaji Dhandapani,
  • J. Iyyappan

摘要

Brewery wastewater contains high organic content, and it must be properly treated before being disposed of into the environment. In this study, a novel composite photocatalyst consisting of calcined chicken bone waste doped with TiO2/MnO and SDS was synthesized by a two-step process. Experiments were performed to treat real-time brewery wastewater collected from the industry and to produce hydrogen using the synthesized composite photocatalyst in a 1 L glass reactor equipped with visible light. Further, process optimization was performed for the variable’s initial pH, photocatalyst concentration, and reaction time using the central composite design. The collected brewery wastewater has 4758 ± 287 mg/L of COD and 950 ± 78 mg/L of BOD levels with a pH of 5.8 ± 0.3. Preliminary experiments showed that calcined chicken bone waste doped with TiO2/MnO and SDS resulted in about 61.48 ± 2.56% of COD removal and about 28 ± 1 mmol of hydrogen production. At optimum conditions (initial pH 8.1, photocatalyst concentration 2.23 g/L, time 180 min), the COD removal percentage and hydrogen production were 90.54 ± 1.62% and 57 ± 2 mmol, respectively. Recycle studies reveal that the synthesized composite photocatalyst is effective and stable for five cycles. Thus, the photocatalyst synthesized in this study will simultaneously produce hydrogen and degrade organic contaminants from brewery wastewater.