Innovative approaches to sustainable wastewater treatment: a comprehensive exploration of conventional and emerging technologies

Abstract

Access to clean water is under threat due to population growth, climate change, and pollution, emphasizing the need for effective wastewater treatment. Wastewater pollutants pose risks to public health and ecosystems, necessitating proper treatment methods. This paper outlines both conventional and emerging technologies for wastewater treatment. Established techniques, such as activated sludge processing, chlorination, and constructed wetlands, are discussed alongside newer methods, such as advanced oxidation, ultraviolet disinfection, membrane bioreactors, reverse osmosis, artificial intelligence optimization, and nanofiltration, which enhance contaminant removal but may incur high costs and energy demands. Integration of renewable energy sources, such as solar, wind, and biomass, into treatment facilities improves efficiency and reduces emissions. The process efficiency can be possibly enhanced through real-time monitoring and automation, while a sustainable and resource-efficient method involves integrating bio-electrochemical systems with constructed wetlands. There are still challenges in sludge handling, land requirements, and long-term system maintenance. Balancing technological solutions, environmental protection, and economic feasibility is essential for sustainable wastewater management, which can ensure continuous access to clean water in the face of increasing demand for this vital resource.