Title : Synergistic integration of photobioreactors and constructed wetlands for reclaimed water production
Abstract:
The transition toward a circular water economy demands innovative solutions capable of transforming a wide range of impaired water sources, from industrial effluents to agricultural runoff and stormwater, into reliable, reusable resources. This keynote explores the transformative potential of a hybrid nature-based solution (NbS) that synergistically integrates photobioreactors (PBRs) and constructed wetlands (CWs) for advanced water reclamation. It will examine how this system operates as an engineered ecological cascade. A microalgae-bacteria consortium within the photobioreactor performs high-efficiency first stage treatment, removing pollutants like organic matter, emerging pollutants of concern, and nutrients while generating valuable microalgae biomass. The constructed wetland subsequently acts as a robust polishing stage, leveraging phytoremediation, microbial processes, and substrate filtration to remove residual contaminants and stabilize water quality to reusable standards. Drawing on applied research, including case studies, this talk will demonstrate how this integrated approach can achieve high removal efficiencies for key pollutants while facilitating nutrient recovery. The discussion will extend to its applicability across diverse sectors, such as dairy processing, textile manufacturing, and urban wastewater and stormwater management, highlighting its versatility in addressing varied water quality challenges. Therefore, this keynote positions the photobioreactor-wetland synergy not merely as a treatment technology, but as a scalable, low-energy paradigm for reclaimed water production. It will conclude by outlining its role in closing the water loop, supporting sustainable industrial practices, and contributing to water security within a circular economy framework.
