Fine bubble disc diffusion aeration system, used to transport air and oxygen into wastewater or industrial wastewater. Microorganisms in water require oxygen to decompose pollutants. The fine bubble diffuser generates a large number of very small bubbles, which slowly rise from the bottom of the aeration tank in wastewater treatment plants or sewage treatment plants, and effectively transfer a large amount of oxygen to the water. Oxygen combines with food sources and wastewater, causing bacteria to produce enzymes that help decompose waste, allowing it to settle or be filtered by membranes in the secondary clarification tank.