Source: Waste360, 12/2/25
Greater Peoria Sanitary District (GPSD) treats 20 to 25 million gallons of wastewater each day and uses some of the resulting biogas to heat its boilers while flaring the rest. But now the Illinois utility has other plans for some of the excess and is banking on monetary and environmental returns. That biogas will be converted to renewable natural gas (RNG), injected into the natural gas pipeline, and sold as transportation fuel—a slow but steady growing trend among water utilities looking to reduce their emissions while capitalizing on their waste byproduct. And they have the ideal feedstock. Their gas is high in methane and low in nitrogen, meaning its energy-rich and requires relatively minimal treatment steps.