The PrO2 Series wastewater treatment system from Aqua Bio Technologies uses nanotechnology to inject concentrated streams of oxygen-rich microbubbles into targeted waste streams, enabling bacteria to consume up to 95 percent of organic waste and reducing aeration costs by 75 percent. About the size of a household refrigerator, the system can be remotely monitored, adjusted in real time and sized from small retention ponds to large industrial use. 877/881-9141; www.aquabio.co.