WSU develops renewable gas from sewage
Analysis based on 6 articles · First reported Apr 21, 2026 · Last updated Apr 26, 2026
This technological breakthrough by Washington State University could significantly impact the waste management and renewable energy sectors by providing a more efficient and cost-effective way to produce Renewable natural gas. It offers a sustainable alternative to fossil fuels, potentially reducing operational costs for wastewater treatment plants and contributing to a circular bioeconomy.
Researchers at Washington State University, led by Birgitte Kiær Ahring, have developed a new method for treating sewage sludge that significantly increases the production of Renewable natural gas and reduces treatment costs by nearly 50%. The process involves a pretreatment step with high temperature, pressure, and oxygen, followed by anaerobic digestion using a novel bacterial strain to convert carbon dioxide into methane. This innovation, funded by the United States — United States Department of Energy, has been patented and is being scaled up with an industrial partner, offering a sustainable solution for waste management and energy needs.
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