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Related Experiment Video

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Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
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Different leachate phytotreatment systems using sunflowers.

Francesco Garbo1, Maria Cristina Lavagnolo1, Mario Malagoli2

  • 1DII, Department of Industrial Engineering, University of Padova, via Marzolo 9, 35131 Padova, Italy.

Waste Management (New York, N.Y.)
|November 6, 2016
PubMed
Summary
This summary is machine-generated.

Sunflowers can treat landfill leachate, reducing contaminants like COD and phosphorus. This phytotreatment method offers a sustainable approach to wastewater management and potential biodiesel production.

Keywords:
Horizontal sub-superficial flowLandfill leachatePhytotreatmentSunflowersVertical flow

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Area of Science:

  • Environmental Science
  • Agricultural Engineering
  • Biotechnology

Background:

  • Increasing water scarcity and the need for renewable fuels drive interest in energy crops for wastewater treatment.
  • Landfill leachate poses environmental challenges, necessitating effective and sustainable treatment solutions.
  • Sunflowers are a viable energy crop due to their potential for biodiesel production.

Purpose of the Study:

  • To assess the feasibility of using sunflowers for landfill leachate phytotreatment.
  • To evaluate different irrigation systems (vertical flow, horizontal subsurface flow) for leachate treatment.
  • To determine the impact of leachate as a fertilizer on sunflower growth and contaminant removal.

Main Methods:

  • Phytotreatment experiments were conducted in 130L tanks under controlled climatic conditions.
  • Two irrigation systems, vertical flow and horizontal subsurface flow, were tested with and without effluent recirculation.
  • Sunflower plants were irrigated with landfill leachate at increasing nitrogen concentrations (up to 372 mgN/L).

Main Results:

  • Landfill leachate was successfully used as a fertilizer without inhibiting sunflower biomass development.
  • Effective removal efficiencies were observed: Chemical Oxygen Demand (COD) >50% and Phosphorus >60%.
  • Horizontal flow systems generally outperformed vertical flow systems in contaminant removal, with no benefit from recirculation.

Conclusions:

  • Sunflower phytotreatment is a feasible method for managing landfill leachate, offering significant contaminant removal.
  • The study highlights the potential for integrating wastewater treatment with renewable energy crop cultivation.
  • Evapo-transpiration in vertical flow systems contributed significantly to volume reduction, up to 80%.