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Evaluating Biogas Utilization From A Proposed Anaerobic Biodigester For The South Park Community
The Duwamish Valley Sustainability Association (DVSA), in partnership with Catherine De Almeida, PLA, ASLA, and supported by University of Washington students, have developed a feasibility assessment exploring the use of biogas generated from a proposed large-scale anaerobic biodigester in South Park, Seattle. This biodigester would convert community-generated food waste into biogas and probiotic plant food. This biogas could be an energy substitute for a number of different uses such as heating, electricity generation, electric vehicle charging, and a replacement for natural gas, known as renewable natural gas (RNG). Following extensive community workshops held in Fall 2024 and Winter 2025, the project team identified a primary interest in using biogas to power a local transportation shuttle. This report explores the technical feasibility, energy capacity, environmental benefits, and regulatory landscape of such a biogas-powered transit solution. The findings demonstrate strong potential for a community-scale biodigester to generate enough biogas to support transportation, enhance energy resilience, and contribute to environmental and climate justice goals. This team believes the biodigester project, with its potential to provide energy to support, expand, and increase access to local infrastructure, can foster environmental justice, economic opportunity, and infrastructure resilience. This report integrates community priorities expressed through community workshops with technical research and regulatory and environmental analysis. Economic modeling is being completed by ECONorthwest as part of a parallel feasibility study. This report emphasizes the potential of biogas to contribute to a circular economy while reducing greenhouse gas emissions and improving neighborhood mobility. This document provides an in-depth look at the biogas system’s capacity, technology requirements, policy landscape, and use case feasibility.
Project Final Report and Conclusions (English)Project Final Report and Conclusions (Spanish)