Abstract
The total power consumption of sewage treatment plants in Japan consists of 0.7% of that of Japan as a whole. Therefore, from a greenhouse effect prevention point of view, it is important to reduce the energy consumption of blowers in sewage treatment plants to reduce CO_2 emission. The Ultra Fine Bubble Diffuser is made of a special membrane punched with many small holes, which enables the generation of ultra-fine bubbles. This enables the Diffuser to have a very high oxygen transfer efficiency, leading to the reduction of required air for the activated sludge process and the reduction of power consumption of the blower. In this paper, the structure and features of the Ultra Fine Bubble Diffuser, along with a case study of an actual application, are introduced.
