Assessment of methane and nitrous oxide emissions from urban community sewer networks: Field quantification and insights into environmental factors.

ABSTRACT: Sewer networks are essential components of urban infrastructure, yet their contribution to greenhouse gas (GHG) emissions remains poorly understood. In this study, we deployed a new approach of in situ measurements to assess methane (CH₄) and nitrous oxide (N₂O) emissions across an urban sewer network, which spans 4769.43 m and receives about 750 m³ of domestic sewage per day. By monitoring at 248 and 151 sites for concentrations and fluxes respectively, we confirmed local GHG hotspots. Overall, the sewer network's total GHG emissions were estimated to be 763.3 g CO₂eq/h, with CH₄ accounting for 99.4 % of the emissions. The mean emission factor was estimated to be 1.05 kg CO₂eq/(m·yr). N₂O concentrations ab

SUBMITTER: Yang Y 

PROVIDER: S-EPMC11871468 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature