Seage treatment is a critical process in managing wastewater and protecting the environment. Among the various methods employed in sewage treatment, the use of algae has gained significant attention due to its numerous benefits. Algae are photosynthetic organisms that can thrive in various environments, making them suitable candidates for wastewater treatment. This article explores the types of algae used in sewage treatment, their mechanisms, advantages, and challenges, as well as future prospects in this field.