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Updated: Jan 19, 2026

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment
Published on: May 2, 2025
Wetlands for wastewater treatment
Umesh Ghimire1, Hariteja Nandimandalam1, Edith Martinez-Guerra2
1Department of Civil and Environmental Engineering, Mississippi State University, Starkville, Mississippi.
Wetland treatment technologies effectively remove nutrients and pollutants from wastewater and stormwater. Optimizing wetland design, vegetation, and operation is crucial for improving effluent water quality.
Area of Science:
- Environmental Engineering
- Water Treatment Technologies
- Ecological Engineering
Background:
- Wetlands are increasingly recognized for their role in wastewater and stormwater management.
- Conventional treatment systems face challenges with nutrient and emerging pollutant removal.
- Decentralized and advanced treatment units utilizing natural processes are in demand.
Purpose of the Study:
- To provide an update on current research and practical applications of wetland treatment technologies.
- To highlight the efficacy of wetlands in removing diverse pollutants, including nutrients, metals, industrial chemicals, pharmaceuticals, and pathogens.
- To summarize factors influencing wetland treatment efficiency, such as vegetation, design, and operational parameters.
Main Methods:
- Review of current research and practical demonstrations of wetland systems.
- Analysis of studies focusing on pollutant removal capabilities (nutrients, metals, emerging pollutants, pathogens).
- Evaluation of the impact of vegetation, wetland design, and operational configurations on treatment performance.
Main Results:
- Wetlands demonstrate significant potential as advanced treatment units or decentralized systems for wastewater.
- Effective removal of nutrients, heavy metals, industrial pollutants, pharmaceutical compounds, and pathogens has been observed.
- Vegetation type, wetland design (e.g., flow path, substrate), and operational strategies significantly influence treatment efficiency.
Conclusions:
- Wetland treatment technologies offer a sustainable and effective approach for wastewater and stormwater management.
- Further research and optimized design are essential for maximizing the removal of a wide range of contaminants.
- Implementing well-designed and operated wetland systems is key to achieving high-quality effluent water.
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