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Nitrogen Removal from Landfill Leachate by Microalgae.

Sérgio F L Pereira1,2, Ana L Gonçalves3, Francisca C Moreira4

  • 1Laboratório de Engenharia de Processos, Ambiente e Energia (LEPABE), Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, 4200-465 Porto, Portugal. ega11026@fe.up.pt.

International Journal of Molecular Sciences
|November 22, 2016
PubMed
Summary

Phycoremediation using Chlorella vulgaris effectively removes nitrogen and phosphorus from landfill leachate. This microalgae shows potential for treating challenging wastewater, offering a sustainable bioremediation solution.

Keywords:
Chlorella vulgarisbiomass productionlandfill leachatemicroalgaenutrient removal kineticswastewater treatment

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Area of Science:

  • Environmental Science
  • Biotechnology
  • Wastewater Treatment

Background:

  • Landfill leachates are complex industrial wastewaters with high ammoniacal-nitrogen and variable composition.
  • Conventional treatment methods struggle with leachate variability, posing environmental challenges.
  • Phycoremediation offers a promising, sustainable alternative for treating landfill leachates.

Purpose of the Study:

  • To evaluate Chlorella vulgaris for biomass production and nutrient removal from landfill leachate.
  • To assess the impact of varying phosphorus loads on microalgal growth and nutrient uptake.
  • To determine the effectiveness of phycoremediation for landfill leachate treatment.

Main Methods:

  • Cultivation of Chlorella vulgaris in different landfill leachate compositions.
  • Evaluation of nitrogen (N-NH₄⁺) and phosphorus removal efficiencies.
  • Assessment of microalgal biomass production under varying nutrient ratios (N:P of 12:1, 23:1, 35:1).

Main Results:

  • Chlorella vulgaris demonstrated growth across all tested leachate compositions.
  • Optimal microalgal growth occurred in leachates with lower ammoniacal-nitrogen concentrations.
  • Significant removal of ammoniacal-nitrogen and phosphorus was observed, enhanced by phosphorus addition.

Conclusions:

  • Chlorella vulgaris is a viable candidate for phycoremediation of landfill leachates.
  • The study highlights the potential for effective nutrient removal and biomass generation.
  • Further research can optimize this bioremediation technology for industrial application.