Dissémination

The Bois de Boulogne experimental filters pass the test of science

For one month, students from AgroParisTech put the performance and environmental impact of the experimental filters installed at the Bois de Boulogne under the microscope. Their verdict, presented at the STEA premises, is unequivocal: the system is effective and environmentally sound.

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The result of a month of fieldwork and in-depth analysis is clear: the experimental filters at the Bois de Boulogne are working. Students from AgroParisTech presented their findings at the STEA premises, delivering a comprehensive assessment of the system across four areas of study:

  • overall evaluation of the filter,
  • bio-physico-chemical impact on the environment,
  • spatio-temporal analysis of the measured parameters,
  • monitoring of biological colonisation.

Their work was also put into perspective with data collected by the previous year's cohort.

 

The conclusion: the filter fully fulfils its treatment role without disrupting the surrounding ecosystem — a result that supports its continued deployment and gives grounds for viewing the future with confidence.

 

The students did, however, identify several areas for improvement to refine monitoring of the system: tracking macro and microplastics, monitoring invasive aquatic species, rewilding the downstream section of the filter to encourage biodiversity, and implementing IBGN monitoring to assess the biological quality of the waterway.