Grand Challenges in Application of Microalgae for Nutrient Recovery

Microalgae-based wastewater treatment systems have emerged as a promising solution for the treatment of wastewater due to their potential to provide a sustainable and cost-effective solution. Studies have demonstrated that these systems can achieve high removal efficiencies for nutrients and organic pollutants, with microalgae capable of removing up to 99% of nitrogen and 100% of phosphorus from wastewater. However, there are several grand challenges associated with the implementation and scalability of these systems. These challenges include the need for more efficient microalgae cultivation and harvesting methods, effective wastewater pre-treatment and post-treatment methods, strategies to minimize the impact of microalgae-based treatment on natural water bodies, and the integration of these systems with existing infrastructure. Addressing these challenges will require continued research and development efforts, as well as collaborations among stakeholders from various sectors. By overcoming these challenges, microalgae-based wastewater treatment systems can play an important role in addressing the growing need for sustainable and cost-effective wastewater treatment solutions, while providing additional benefits such as the production of biofuels and other value-added products. This paper highlights the main grand challenges associated with microalgae-based wastewater treatment and provides an overview of the current status of research in addressing these challenges. The paper also presents some suggestions for future research to overcome these challenges and promote the implementation and scalability of microalgae-based wastewater treatment systems