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Due to the growing interest in global warming, energyintensive wastewater treatment plants (WWTPs) have been required to reduce their power consumption and CO2 emission. Since 30-40% of the total power consumption in the whole WWTPs is derived from the aeration process, efficient diffusers called ultra fine bubble diffusers have been introduced. The ultra fine bubble diffuser is intended to achieve high oxygen transfer efficiency by generating fine bubbles from a membrane with fine perforation slits. This paper illustrates the availability of new ultra fine bubble membrane tube diffuser which corresponds with the various maintenance needs, by examining its oxygen transfer efficiency, mixing ability and pressure loss in the actual WWTP.
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