Constructed wetlands (CWs) have been employed as an alternative to traditional wastewater treatment technology for over 50 years. CW is an effective solution for treating urban storm runoff and industrial wastewater, with the microorganisms therein acting as the primary force behind the bioremediation process by degrading the pollutants and nutrient transformation. Recent advancements in CW models such as bioelectrochemical-constructed wetland systems (BES-CWs), Microbial fuel cells –constructed wetlands (MFC-CWs), are gaining momentum. The presence of electro-active bacteria (EAB) and electrode bio-carrier enhances pollutant degradation via extracellular electron transfer. Artificial aeration, matrix improvement, several wetland systems in series, step-feeding and effluent recycling, coupling with BES, and other modern CW layout and operational procedures, for example, have all modern CW's layout and operational procedures to boost the effectiveness of emerging contaminants changes and their elimination. For instance, BES-CWs have been developed to address antibiotics such as sulfamethoxazole (SMX), sulfadiazine (SDZ), ciprofloxacin (CIP),, and tetracycline, proving to be effective and environmentally friendly in preventing antibiotics from entering the aquatic ecosystem. So, there is a critical need for designing different types of constructed wetlands with advanced models as they work in natural environments and have greater efficiency as compared to traditional methods. This chapter focuses on BES combined with CWs, known by several names such as MFC-CWs, electro-wetland, Microbial electrolytic cells associated with CWs (MEC-CWs), etc. Integrating BES into CWs reduces electron acceptor availability and enhances operational controllability by balancing redox activity and electron flow in the aerobic and anaerobic zones of the CW bed matrix. Benefits of CW-MFC include high treatment efficiency, electricity generation, and the elimination of intractable pollutant.

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Recent Advanced Models of Constructed Wetlands Applied for Water Purification Across the Globe

  • Tamanna Deswal,
  • Shivani Narwal,
  • Hritik Kadian,
  • Rajesh Dhankhar

摘要

Constructed wetlands (CWs) have been employed as an alternative to traditional wastewater treatment technology for over 50 years. CW is an effective solution for treating urban storm runoff and industrial wastewater, with the microorganisms therein acting as the primary force behind the bioremediation process by degrading the pollutants and nutrient transformation. Recent advancements in CW models such as bioelectrochemical-constructed wetland systems (BES-CWs), Microbial fuel cells –constructed wetlands (MFC-CWs), are gaining momentum. The presence of electro-active bacteria (EAB) and electrode bio-carrier enhances pollutant degradation via extracellular electron transfer. Artificial aeration, matrix improvement, several wetland systems in series, step-feeding and effluent recycling, coupling with BES, and other modern CW layout and operational procedures, for example, have all modern CW's layout and operational procedures to boost the effectiveness of emerging contaminants changes and their elimination. For instance, BES-CWs have been developed to address antibiotics such as sulfamethoxazole (SMX), sulfadiazine (SDZ), ciprofloxacin (CIP),, and tetracycline, proving to be effective and environmentally friendly in preventing antibiotics from entering the aquatic ecosystem. So, there is a critical need for designing different types of constructed wetlands with advanced models as they work in natural environments and have greater efficiency as compared to traditional methods. This chapter focuses on BES combined with CWs, known by several names such as MFC-CWs, electro-wetland, Microbial electrolytic cells associated with CWs (MEC-CWs), etc. Integrating BES into CWs reduces electron acceptor availability and enhances operational controllability by balancing redox activity and electron flow in the aerobic and anaerobic zones of the CW bed matrix. Benefits of CW-MFC include high treatment efficiency, electricity generation, and the elimination of intractable pollutant.