With net-zero targets on the horizon, water utilities are increasingly focused on addressing their role in climate change. While advances in renewable energy and energy recovery are helping reduce indirect (Scope 2) emissions, direct (Scope 1) emissions — such as nitrous oxide (N₂O) and methane (CH₄) — are becoming an increasingly significant challenge.

This recently completed Water Research Australia project, State of Knowledge of Scope 1 Emissions from Sewage Treatment Plants, provides a comprehensive review of Scope 1 emissions from wastewater treatment processes.

In the report, researchers from the University of Queensland delved into:

  • The sources and pathways and influencing factors of N₂O, CH₄, and CO₂ emissions;
  • The current guidelines for reporting Scope 1 emissions;
  • The results of existing full-scale monitoring and quantification studies; and
  • Strategies to mitigate Scope 1 emissions.

By identifying key gaps and future research needs, this report informs water utilities on the next steps to address Scope 1 emissions and progress toward net-zero emissions in wastewater treatment.

This report is exclusively available to WaterRA members. Log in to our Member Portal now to download your copy!