Application of algae-bacteria symbiosis system for ammonia nitrogen wastewater treatment.

In industrial processes, the primary sources of ammonia nitrogen emissions are organic matter and nitrogen-containing chemicals. When released directly into the environment, these nitrogen compounds elevate aquatic toxicity and reduce dissolved oxygen levels, significantly affecting aquatic ecosystems. This review introduces both traditional and novel ammonia nitrogen wastewater treatment technologies. Traditional methods include physical, chemical, and biological processes. The focus of this review is on novel ammonia nitrogen wastewater treatment technology based on algae-bacteria symbiosis systems. The review discusses key environmental factors influencing the algae-bacteria symbiosis system, such as temperature, light intensity, carbon dioxide concentration, and bioflocculation. Furthermore, it presents innovative large-scale algae-bacteria symbiosis system designed to achieve high carbon dioxide removal efficiency while effectively treating ammonia nitrogen wastewater with low energy consumption. This review aims to provide valuable insights that support the future development of efficient and commercially viable novel technologies for treating ammonia-nitrogen wastewater.