Powered By Oats

The University of Iowa is, at least partially:

One afternoon about 10 years ago, the Quaker Oats processing facility in Cedar Rapids contacted administrators at the University of Iowa. The oatmeal, granola, and cereal manufacturer generates thousands of tons of oat hulls each year, and it wanted to know if the university was interested in purchasing the waste product—significantly cheaper than coal—to use as a fuel in its campus power plant.
After spending $1 million on two years of testing and other preliminary work, U of I started processing oat hulls in 2003, combining them with coal and burning the mix as fuel. The deal with Quaker Oats has saved the school up to a half-million dollars each year, depending on the market price of coal. The institution plans to quadruple the amount of biomass it uses as a fuel by 2020, with a goal of making it 40 percent of the fuel mix.
"One of the big themes is, let's get our energy local," says Ferman Milster, principal engineer for renewables at the university's Office of Sustainability. He estimates that the university's goal of upping its local biomass purchases could return about $6 million annually to the local economy.
This change in U of I's energy infrastructure was made easier by the school's district energy system—a centralized boiler that delivers heating and cooling services to the campus. Now common on college campuses, these utilities are still found in some municipalities, often dating to the early 20th century, when towns were built around a dense urban core. It's far less common today to see towns installing the same infrastructure. Recently, however, the small town of West Union, Iowa, decided to give it a try, investing in a district energy system that will tap geothermal energy to lower heating and cooling costs for downtown businesses. The $2.5 million project is a collaborative effort, funded by grants from EPA, state government, and the U.S. Energy Department.

I've been by that Quaker Oats factory in Cedar Rapids.  It is massive.