Anammox is a biological process that converts ammonia into nitrogen gas using anaerobic bacteria. This process occurs in oxygen-depleted environments, such as deep-sea sediments and wastewater treatment facilities. The term "Anammox" stands for "anaerobic ammonium oxidation," highlighting its role in the nitrogen cycle. The Anammox process is significant for reducing nitrogen pollution in aquatic ecosystems. By transforming ammonia, which can be harmful in high concentrations, into nitrogen gas, it helps maintain ecological balance. This process is also being explored for its potential in sustainable wastewater management and reducing greenhouse gas emissions.