The article discusses the significance of utilizing microalgae and bioreactors to enhance biogas production efficiency and wastewater treatment processes. Researchers are exploring advanced technologies to reduce costs and improve overall efficiency in biogas generation and wastewater treatment. Microalgae are highlighted for their effectiveness in treating wastewater, producing biofuels like biogas, and capturing and utilizing atmospheric CO2. The study emphasizes the environmental benefits of microalgae-based treatments, which require less energy than traditional methods and contribute to reducing global warming potential. By combining microalgae with cutting-edge technologies like algal-based membrane bioreactors, researchers aim to maximize energy recovery and produce biofuels, biochemicals, and biofertilizers sustainably. Despite the potential of microalgae for biogas and hydrogen production, challenges such as high costs, energy consumption, and operational complexities hinder commercialization efforts. The article underscores the importance of leveraging microalgae and bioreactors to address wastewater treatment challenges and promote clean energy solutions.