Innovation at wastewater plant propels St. Cloud to renewable energy leader

June 16, 2022

(…) Future initiatives underway at the facility include the use of renewable hydrogen and carbon-capturing. The facility plans to produce clean hydrogen fuel and pure oxygen on-site, by running water through an electrolyzer that uses renewable electricity to separate the H2O molecule into hydrogen and oxygen.

The facility could then use the hydrogen to power its generators or as a heat source. The oxygen would be used for wastewater treatment, saving energy by using less electricity to pump pure oxygen into the aerators compared with ambient air that only contains about 20% oxygen. The aerators are large open-air storage tanks where oxygen is added to waste from St. Cloud and the surrounding cities to spur the biodegradation of organic materials.

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