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<p>Microalgae are increasingly recognized not only as producers of bio-based compounds but also as promising agents for wastewater remediation. Their ability to assimilate organic and inorganic nutrients, coupled with the potential for metal removal, makes them suitable candidates for sustainable water treatment. In particular, mixotrophic microalgae can utilize both organic and inorganic carbon sources, along with nitrogen and phosphorus, thereby reducing the concentration of pollutants in wastewater. Conventional primary and secondary treatments are often insufficient to eliminate residual nutrients, metals, and toxic compounds, leading to secondary pollution. In this study, the phycoremediation potential of <i>Desmodesmus subspicatus</i> and <i>Tetradesmus obliquus</i>, two freshwater microalgae, was investigated. Both species demonstrated high efficiency in reducing pH, chemical oxygen demand (COD), nitrogen, phosphorus, potassium, calcium, magnesium, sodium, and potassium. The findings highlight the dual benefit of these microalgae in nutrient recovery and metal removal, emphasizing their role as sustainable alternatives to conventional tertiary and quaternary wastewater treatment methods.</p>

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Phycoremediation of Metals from Wastewater using Desmodesmus Subspicatus EU-KWBG-1 and Tetradesmus Obliquus EU-MWBG-1

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Pooja Arora,
  • Rajeshwari Negi,
  • Ashok Yadav,
  • Sunil Kumar,
  • Neelam Yadav,
  • Ajar Nath Yadav,
  • Amrik Singh Ahluwalia

摘要

Microalgae are increasingly recognized not only as producers of bio-based compounds but also as promising agents for wastewater remediation. Their ability to assimilate organic and inorganic nutrients, coupled with the potential for metal removal, makes them suitable candidates for sustainable water treatment. In particular, mixotrophic microalgae can utilize both organic and inorganic carbon sources, along with nitrogen and phosphorus, thereby reducing the concentration of pollutants in wastewater. Conventional primary and secondary treatments are often insufficient to eliminate residual nutrients, metals, and toxic compounds, leading to secondary pollution. In this study, the phycoremediation potential of Desmodesmus subspicatus and Tetradesmus obliquus, two freshwater microalgae, was investigated. Both species demonstrated high efficiency in reducing pH, chemical oxygen demand (COD), nitrogen, phosphorus, potassium, calcium, magnesium, sodium, and potassium. The findings highlight the dual benefit of these microalgae in nutrient recovery and metal removal, emphasizing their role as sustainable alternatives to conventional tertiary and quaternary wastewater treatment methods.