Wastewater treatment and recycling using Spirulina algae have become increasingly popular in recent years due to its potential to address a range of environmental and nutritional challenges (3). The primary objective of this approach is to use wastewater as a nutrient source for Spirulina algae cultivation and then harvest the algae as a feed for both Plants and animals. In this Research, we will discuss in detail the various objectives of wastewater treatment recycling using Spirulina algae and how it can help promote sustainable development(3). One of the primary objectives of using Spirulina algae to treat wastewater is to promote environmental sustainability(1). Wastewater treatment is crucial to reducing the environmental impact of untreated wastewater, which can harm aquatic life and pollute water bodies. By using Spirulina algae as a means of treating wastewater, we can reduce the level of harmful pollutants in the water and promote a healthier ecosystem(2). Spirulina algae can absorb and metabolize a range of contaminants, including nitrogen and phosphorus, which are often found in wastewater. As a result, using Spirulina algae for wastewater treatment can help reduce the level of pollutants released into the environment, ultimately promoting a more sustainable and healthier ecosystem. Another significant objective of using Spirulina algae to treat wastewater is to promote nutritional benefits. Spirulina is a highly nutritious food source that is rich in protein, vitamins, and minerals.(4) By cultivating Spirulina using wastewater and then using the harvested algae as a food source, we can provide a sustainable and nutritious food source that can benefit both human health and the environment. Spirulina has been shown to have numerous health benefits, including reducing inflammation, boosting the immune system, and improving digestive health. Additionally, Spirulina is an excellent source of protein, making it an ideal food source for vegetarians and vegans. Moreover, the use of Spirulina algae for wastewater treatment and recycling can help promote economic development.(5) Spirulina cultivation can be a profitable business opportunity, particularly in areas where water and other resources are scarce. (6)Additionally, the use of Spirulina algae for wastewater treatment can help reduce the costs associated with traditional wastewater treatment methods. As a result, using Spirulina algae for wastewater treatment and recycling can create new economic opportunities while also promoting sustainable development.