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Municipal Wastewater

Methane Mitigation Matters: Biogas
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Methane is produced when the organic material in municipal wastewater decomposes anaerobically. Varying amounts of methane are emitted during the collection, handling, and treatment of wastewater depending on methods employed. A number of techniques can be employed to reduce or recover and use wastewater methane that can yield substantial energy, economic, environmental, air quality, and public health benefits.

The Municipal Wastewater Technical Group, including experts from government and the private sector, provides international leadership to mitigate global methane emissions through the abatement, recovery, and use of methane from municipal wastewater sources. The technical group works to identify needs, opportunities and priorities for project development globally as well as key barriers and strategies to overcome them. The technical group also facilitates investment and financing opportunities and other cooperative activities and projects that advance the abatement and recovery of methane and its use as an energy source.

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Tools & Resources

Biogas Wastewater Assessment Technology Tool (BioWATT)

Originally developed by the World Bank and enhanced by GMI, the Biogas Wastewater Assessment Technology Tool (BioWATT) (XLS, 1.8 MB) provides a quick and preliminary assessment of wastewater-to-energy projects.

Based on simple inputs provided by the user, BioWATT provides the following:

  • Biogas production estimate for various wastewater-to-energy technologies
  • Electricity generation potential from the produced biogas
  • Greenhouse gas savings associated with biogas-generated electricity
  • Preliminary assessment of the wastewater treatment facility’s electricity demand that can be met through biogas-generated electricity
  • Preliminary design parameters of major components of a wastewater-to-energy project, such as required digester volume, required gas holder volume, and total combined heat and power (CHP) electric power output
  • Impact on a wastewater treatment facility’s operating expenses (OPEX) by investing in energy generation technology


Additional Resources for Municipal Wastewater

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