The Floating Treatment Wetland System (FTWS) emerges as a crucial solution to counteract the pollution of urban water bodies and wetlands caused by human activities and contaminants. Lakes like Nagdaha in Dhapakhel, Lalitpur, face contamination from nearby settlements, agricultural lands, and grazing areas, leading to eutrophication and degradation of water quality. Implemented by Small Earth Nepal in collaboration with international organizations, the FTWS utilizes phytoremediation plants that float on synthetic buoyant mats. These plants, such as Tradescantia pallida and Canna indica, absorb pollutants through their roots, supported by pollutant-degrading microbes, effectively reducing nitrate, ammonia, and biological oxygen demand in water bodies.
Research assistant Ayashwori Byanju highlights the success of microcosm and field prototype studies in Nepal, demonstrating a substantial reduction in pollutants within two months. The FTWS technology not only provides a sustainable method to remediate water pollution but also offers a platform for local governments and communities to monitor and understand its efficacy. Dr. Dhiraj Pradhnanga, UNESCO Chair in Mountain Water Sustainability, emphasizes the positive impact of FTWS on improving the quality of contaminated lake water, managing invasive plants, and enhancing aquatic ecosystems. This eco-technological approach shows promise in addressing water pollution issues and ensuring safe drinking water for urban communities facing similar challenges.
In conclusion, the Floating Treatment Wetland System emerges as a nature-based solution with the potential to significantly improve water quality in polluted urban lakes. Through the implementation of phytoremediation plants and collaboration with local stakeholders, this technology offers a sustainable and effective means of mitigating the adverse effects of water pollution, providing a valuable resource for communities and governments dealing with similar challenges.
