Analyzing the variation of greenhouse gas emissions from typical municipal wastewater treatment plants in Beijing during 2007-2021
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View abstract on PubMed
Summary
This summary is machine-generated.Greenhouse gas (GHG) emissions from wastewater treatment plants (WWTPs) increased with higher treatment demands but decreased after energy reforms. Energy recovery and clean energy use offer significant mitigation potential.
Area Of Science
- Environmental Science
- Climate Change Mitigation
- Wastewater Engineering
Background
- The dual carbon goals and stricter effluent standards necessitate reducing greenhouse gas (GHG) emissions from wastewater treatment plants (WWTPs).
- Understanding the factors influencing GHG emissions is crucial for developing effective mitigation strategies.
Purpose Of The Study
- To evaluate the impact of season, elevated standards, operating parameters, and clean energy use on GHG emissions from WWTPs in Beijing.
- To assess the potential for GHG emission reduction through various strategies by 2050.
Main Methods
- Analysis of 180 monthly monitoring data from 8 typical WWTPs in Beijing.
- Comparison of GHG emissions across different years (2007, 2017, 2021) reflecting changes in treatment demand and energy structure.
- Scenario analysis to project future mitigation potential.
Main Results
- Total GHG emissions increased by 89% from 2007 to 2017 due to increased treatment demand and chemical oxygen demand removal.
- Following energy structure reform, total GHG emissions decreased by 17% by 2021.
- Energy recovery and clean energy utilization show mitigation potential of 64% and 48% by 2050, respectively.
Conclusions
- Stricter effluent standards can inadvertently increase GHG emissions in WWTPs.
- Process optimization, temperature control, and targeted policies are key to reducing WWTP GHG emissions.
- Implementing energy recovery and clean energy sources are vital for achieving climate goals in the wastewater sector.
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