The fine bubble disc diffuser was developed specifically for releasing 1–3mm fine bubbles in the wastewater treatment plant. All materials were selected for their ability to withstand the effects of chemical and bio-chemical agents, and 0–100°C wastewater tanks. The diffuser can be placed in an evenly distributed grid system at the bottom of an entire aeration tank. Air can then easily pass through the orifice and integrated non-return valve into the wastewater