Novel overlapping constructed wetlands with water drops reoxygenation and lightweight fillers for decentralized wastewater treatment
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View abstract on PubMed
Summary
This summary is machine-generated.Novel overlapping horizontal subsurface flow constructed wetlands (CWs) with mixed lightweight fillers significantly improve total nitrogen (TN) removal (88-91%) and reduce land use for rural wastewater treatment.
Area Of Science
- Environmental Engineering
- Water Treatment Technologies
- Wastewater Management
Background
- Constructed wetlands (CWs) are vital for decentralized rural wastewater treatment.
- Existing CWs face challenges with nutrient removal efficiency and land requirements.
Purpose Of The Study
- To develop and evaluate a novel overlapping horizontal subsurface flow constructed wetland (OLCW).
- To assess the impact of mixed lightweight fillers on OLCW performance for nutrient removal.
Main Methods
- Construction of a novel OLCW system.
- Utilizing mixed lightweight fillers in the OLCW.
- Evaluating total nitrogen (TN) removal efficiency under varying hydraulic loading rates.
Main Results
- Mixed lightweight filler OLCWs (M-OLCWs) achieved significantly higher TN removal (88-91%) compared to single filler OLCWs (48-62%).
- The second stage of M-OLCWs showed excellent TN removal (73-75%) due to reoxygenation from water drops.
- Lightweight fillers supported higher abundance and diversity of nitrogen-related microorganisms.
Conclusions
- M-OLCWs offer enhanced pollutant treatment efficiency and reduced land footprint.
- Water drop reoxygenation is a key factor in the improved performance of M-OLCWs.
- This technology presents a sustainable solution for rural decentralized wastewater treatment.
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