Even with a former comedy writer serving in the United States Senate, I would have expected someone to mine the humor potential in this energy project.
Washington D.C.’s water department is working on an enriched water (also known as wastewater) plant that uses thermal hydrolysis to generate, among other things, energy. It’s the first effort of its kind in North America, and it will start operations this summer, with the goal of achieving full operation in January 2015. Cambi, a company in Norway, developed the technology that is the heart of the new water treatment plant. Here’s a time-lapse video of construction.
Thermal hydrolysis will take the solids generated in regular wastewater treatment and cook them so that microbes can digest them more effectively. The resulting methane gas will power a turbine on site. That turbine will generate steam that provides the heat to cook the solids. A different take on the circle of life, but a cycle nonetheless.
The power generated in the effort will be consumed by other plant operations, but it certainly helps reduce the resource demands for water treatment. An additional benefit of this process is that the biosolids produced by thermal hydrolysis are class A (the current output is class B). Class A biosolids can be used for a lot more agricultural purposes as they are cleaner. Producing Class A solids will reduce the transportation costs for the plant’s biosolids, further reducing the energy costs of the operation.
But, seriously, nobody has mined the comic vein of Washington producing something out of excrement? Maybe that will change once operations start, but I’m just a little disappointed.