A former dairy farmer has partnered with local wastewater haulers to build a plant in Wisconsin which will convert wastewater from five local cheese factories into solid fertiliser and methane gas. The methane will be burned to generate 3.2 megawatts of electricity; enough to power 3,000 homes.
The facility is primarily concerned with wastewater treatment. While the untreated rinse water can be used as a fertiliser, it runs off into rivers and lakes when the ground is frozen during the winter months, causing pollution. Using a process of anaerobic digestion, GreenWhey will process the wastewater for the cheese factories, produce fertiliser for the farms and supply renewable energy to homes. A win, win, win project!