Fine Bubble Diffuser (EPDM Or Silicon), Fine bubble diffusers produce a plethora of very small airbubbles which rise slowly from the floor of a wastewatertreatment plant or sewage treatment plant aeration tank andprovide substantial and efficient mass transfer of oxygen tothe water. The oxygen, combined with the food source,sewage, allows the bacteria to produce enzymes that helpbreak down the waste so that it can settle in the secondaryclarifiers or be filtered by membranes