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May 25, 2026Current Opinion in Environmental Science & Health0 citationsOpen Access

Constructed Wetlands for Greywater Treatment

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CMCarlo MorandiHSHeidrun Steinmetz

Key Points

  • The aim is to evaluate the effectiveness of constructed wetlands in treating greywater for safe reuse.
  • Utilized multi-stage hybrid constructed wetlands (CWs) for treatment
  • Focused on bathroom-only greywater to optimize filter area
  • Assessed total nitrogen (TN) removal through alternating redox zones
  • Achieved >70% total TN removal with multi-stage CWs
  • Reduced filter area requirement to < 0.5 m² per person
  • Demonstrated post-disinfection necessary to meet strict reuse standards

Abstract

• Stream-specific pretreatment is required to reduce TSS and prevent clogging • Multi-stage hybrid CWs outperform single-stage vertical and horizontal flow designs • Treating bathroom-only greywater reduces the filter area to 70% total TN removal through alternating redox zones • Meeting stringent unrestricted reuse standards requires post-disinfection

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Cite This Study

Morandi et al. (2026) studied this question.

synapsesocial.com/papers/6a13e71a0e02ee3982d31c5chttps://doi.org/10.1016/j.coesh.2026.100737
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