Wastewater–the stuff that goes down the toilet when you flush–is often treated and used for everything from creating artificial snow to watering golf courses. But this is perhaps the most palatable option for reusing the stuff that we’ve heard in a while: Hydrogen fueling company Air Products just opened a fueling station that turns methane gas from a local wastewater treatment plant into hydrogen gas that can be used to fill fuel cell vehicles–a first in the hydrogen fuel cell industry.

The Orange County, CA station uses methane gas from the Orange County Sanitation District’s municipal wastewater plant. The methane is funneled into a purification system, where it is fed to a fuel cell and turned into hydrogen. Electricity and heat from the fuel cell is used at the wastewater facility, while excess hydrogen is used at Air Products’ filling station. The station can produce enough hydrogen to fuel up to 50 vehicles each day.

“This is the epitome of sustainability, by taking human waste and

transforming it into electricity which we need, and transportation fuel

that we need, as well as thermal product heat that could serve the

process of transforming the feed waste into productive products,” said

Professor Scott Samuelsen, director of National Fuel Cell Research Center at the

University of California, Irvine, in a statement.

Samuelsen is correct–it doesn’t get more sustainable than this. Scaling Air Products’ wastewater fueling technology, however, may be a challenge. Because for now, automakers are largely focused on electric vehicle technology. There just aren’t enough hydrogen cars to support a network of hydrogen filling stations.

That may change when the fuel cell vehicle market really starts around 2014, when the cars start rolling off production lines. In 2015, the real test begins: GM plans to build a hydrogen fueling infrastructure for Hawaii. And if Air Products’ wastewater fueling station is successful, GM might want to consider adapting the technology in the future.

[Image: Air Products]