As measures against global warming move forward, there is a growing need for sewage treatment plants to reduce CO2 emissions and electricity consumption. As far as sewage treatment plants are concerned, the aeration in reaction tanks in which biological treatment takes place consumes 40 to 50% of total electricity consumption. In order to cut down this consumption dramatically, SHI has developed “Air Revo” to replace conventional air diffusers. “Air Revo” is a set of ultra-fine bubble aeration panels that is efficient in transferring oxygen. The results of performance tests show that the introduction of Air Revo into biological reaction tanks can reduce electricity consumption of air blowers dramatically.